Colostrum properties – is it worth it for adults 2026

The Polish market for bovine colostrum supplements in 2026 already counts over 80 registered brands. The global segment of bovine colostrum reached a value of 2.5 billion USD in 2024, with a projected CAGR growth of 4.7% until 2030 (Grand View Research, 2024). Consumers are attracted by the promise of immune support, gut health, and post-workout recovery.

The question of "is colostrum worth it" is being asked by more and more people who train, struggle with recurring infections, or have gastrointestinal issues. The answer requires understanding what each component actually does: immunoglobulins IgG, IgA, and IgM, lactoferrin, growth factors IGF-1 and EGF, proline-rich polypeptides (PRP), lysozyme, and lactoperoxidase.

In this article, we analyze scientific evidence from 2000 to 2024. We utilize Davison's meta-analysis from the British Journal of Nutrition (2021), Ulfman's review from Frontiers in Nutrition (2018), and Lonnerdal's classic work from the American Journal of Clinical Nutrition (2003) on lactoferrin. We show where colostrum works, where effects are overestimated, and how to realistically choose a dose of 5-20 g per day.

KEY INFORMATION
– Bovine colostrum contains 10-100 times more immunoglobulins than milk, mainly IgG (40-80 g/L), IgA, and IgM (Ulfman, Front Nutr, 2018).
– Lactoferrin (1-5 g/L in colostrum) binds iron and inhibits the growth of pathogens, including Candida albicans and E. coli (Lonnerdal, Am J Clin Nutr, 2003).
– Davison's meta-analysis showed a reduction in the incidence of URTI in athletes by up to 50% with a dose of 3-20 g per day (Davison, Br J Nutr, 2021).
– The standard clinical dose is 5-20 g/day for 8-12 weeks; lower doses mainly act locally in the intestines.
– HTST pasteurization plus lyophilization preserves 70-90% of IgG activity, while UHT sterilization destroys most immunoglobulins.
– Studies have limitations: most RCTs involve athletes and children. There is a lack of long-term RCTs in sedentary adults.

What is colostrum and how does it differ from milk?

Bovine colostrum is the secretion from a cow's mammary gland during the first 24-72 hours after giving birth. It contains 40-80 g/L of immunoglobulins compared to 0.5-1 g/L in mature milk, which is a concentration 10-100 times higher (Ulfman, Front Nutr, 2018). It is a biological "starter pack" for immunity that the mother passes on to the calf.

In cattle, the placenta does not transfer antibodies from the mother to the fetus. The calf is born with an almost zero level of immunoglobulins in its blood. The first hours after birth are critical. Without drinking colostrum, the calf would be defenseless against environmental bacteria. Hence the huge concentration of IgG in colostrum.

In humans, the situation is different. The placenta actively transports IgG from the mother to the child during the third trimester. Nevertheless, human colostrum also contains elevated levels of IgA and growth factors. The difference is that human newborns receive a "ready-made" set of antibodies through the blood, while calf newborns receive them solely through the gastrointestinal tract.

Where is commercial colostrum sourced from?

Supplement manufacturers obtain colostrum within the first 6-16 hours after the cow gives birth. The highest concentration of IgG occurs in the first dose of colostrum that the calf receives. Ethical farms follow the "calf first" principle: the calf receives the first portion, and only the surplus goes to supplements. Scandinavian and New Zealand dairy programs certify this practice.

Freeze-drying is the preferred drying technique. It preserves protein structure better than spray drying. After freeze-drying, the powder typically contains 30-50% proteins, including 15-25% immunoglobulins, 1-3% lactoferrin, and measurable amounts of IGF-1, EGF, and PRP (Elfstrand, Int Dairy J, 2002).

Goat and sheep colostrum: alternatives?

Goat colostrum has a lower concentration of IgG (20-40 g/L) than bovine colostrum but a higher proportion of IgA. Smaller protein molecules in goat milk are better tolerated by individuals with mild sensitivity to cow's milk proteins. Sheep colostrum is even rarer on the market and mainly used in niche products.

In practice, 95% of clinical studies concern bovine colostrum. If you are looking for a product with the best scientific documentation, choose bovine colostrum. Goat colostrum can be more expensive and less studied, although the theoretical benefits for sensitive individuals are real.

Bovine colostrum is colostrum from the first 72 hours after the cow gives birth, containing 40-80 g/L of immunoglobulins, 1-5 g/L of lactoferrin, and growth factors IGF-1 and EGF (Ulfman, Front Nutr, 2018). The concentration of bioactive proteins exceeds that of mature milk by up to 100 times.

What are the key bioactive components of colostrum?

The composition of colostrum differs from mature milk not only quantitatively but also qualitatively. Colostrum is dominated by immunoglobulins IgG (80% of total antibodies), lactoferrin, lysozyme, lactoperoxidase, growth factors IGF-1, IGF-2, EGF, TGF-beta, and proline-rich polypeptides (Ulfman, Front Nutr, 2018). Each of these fractions plays a distinct role.

Immunoglobulins IgG, IgA, IgM

IgG is the dominant fraction of antibodies in bovine colostrum, accounting for about 80-85% of all immunoglobulins. The concentration is 40-80 g/L in raw first dose, dropping sharply to 5-10 g/L after 72 hours (Ulfman, Front Nutr, 2018). Bovine IgG recognizes conserved epitopes of bacteria, including E. coli, Salmonella, and some rotaviruses.

IgA constitutes 8-15% of immunoglobulins in colostrum. The secretory form SIgA is crucial for the mucous membranes of the intestines and respiratory tract. It is the first line of defense for mucous membranes. Colostrum supplementation may influence the level of one's own SIgA in saliva, although data is mixed.

IgM constitutes 1-7% of antibodies. It serves as the first "alarm" in response to a new pathogen. IgM molecules have a pentameric structure and can bind several antigens simultaneously. This makes them extremely effective in agglutinating bacteria in the early hours of infection.

Lactoferrin – a bioactive iron chelator

Lactoferrin constitutes 1-5 g/L of bovine colostrum, which is about 30-100 times more than in mature milk. It is a glycoprotein that binds two iron ions Fe(III). Lonnerdal's classic work described how lactoferrin maintains the microbiological balance of infants' gastrointestinal tracts by sequestering iron (Lonnerdal, Am J Clin Nutr, 2003).

The mechanism is clever. Most pathogenic bacteria need iron to grow. Lactoferrin grabs free iron from the environment and makes it unavailable to microbes. Bifidobacteria and Lactobacillus have different pathways for iron uptake, so they do not suffer. The net effect is selective inhibition of pathogens.

The second mechanism is the direct antibacterial activity of lactoferricin fragment. This is a peptide released during the digestion of lactoferrin in the stomach. It shows activity against E. coli, Klebsiella, Pseudomonas, and some yeast-like fungi, including Candida albicans (PMC, 2016).

Growth factors IGF-1, IGF-2, EGF, TGF-beta

The growth factors in colostrum are primarily IGF-1 (200-2000 ng/g), IGF-2, epidermal growth factor EGF, and transforming growth factor beta (TGF-beta). Most of these proteins are digested in the stomach, but local action on the intestinal mucosa remains significant (Playford, Clin Sci, 2000).

EGF and TGF-beta support the regeneration of enterocytes, which are the cells lining the intestines. After damage, for example caused by NSAIDs or physical exertion, these factors accelerate the closure of intercellular "gaps." This is the fundamental mechanism for sealing the intestinal barrier.

IGF-1 raises the most controversy. This hormone is associated with growth processes, and some studies suggest a link between persistently elevated IGF-1 and the risk of certain cancers. However, it is important to note: IGF-1 from colostrum is digested in the gastrointestinal tract by over 90%. The amount that enters the bloodstream is negligible compared to the body's own production (Mero, Nutrition, 2002).

Proline-rich polypeptides (PRP)

Proline-rich polypeptides (PRP), also known as colostrinin, are a small peptide fraction from colostrum with a mass of 1-6 kDa. In vitro and animal studies show that PRP modulate cytokine activity, inhibiting excessive production of IL-6 and TNF-alpha. They have an "immunomodulatory" profile, not simply an "immune-boosting" one.

Polish studies on PRP conducted since the 1970s at the Institute of Immunology and Experimental Therapy PAN in Wrocław have described potential applications in Alzheimer's disease. The results are promising but require confirmation in large RCTs. Most current evidence comes from small pilot studies.

Lysozyme and lactoperoxidase

Lysozyme is an enzyme that breaks down peptidoglycan in the cell wall of Gram-positive bacteria. In colostrum, the concentration is 0.1-0.3 g/L. This is about 10 times more than in mature milk. Together with lactoferrin and lactoperoxidase, it forms a synergistic system of "innate chemical defense."

Lactoperoxidase, in the presence of thiocyanate and hydrogen peroxide, generates hypothiocyanates, which are oxidizing compounds that destroy bacteria. This protective system works in the gastrointestinal tract and on mucous membrane surfaces. Activity is preserved after freeze-drying but is lost during thermal processing above 75 degrees Celsius.

How does colostrum affect the immune system?

The mechanism of action of colostrum on immunity is multi-level. The main effects are passive immunization in the intestines through IgG, iron sequestration by lactoferrin, support for mucous membranes through SIgA modulation, and immunomodulation through PRP (Ulfman, Front Nutr, 2018). Only a small part of the evidence concerns systemic action.

Passive immunization in the gastrointestinal tract

IgG from colostrum is not absorbed into the bloodstream in adults. The gastrointestinal barrier of an adult person retains molecules of this size. This is a key difference compared to calf newborns, whose intestines "open up" to immunoglobulins in the first hours of life.

The action remains local. Bovine IgG binds to bacteria and viruses in the intestinal lumen, neutralizing them before they penetrate through the mucosa. This is an effective strategy, especially in gastrointestinal infections. Studies on travelers have shown a reduction in symptoms of traveler's diarrhea after prophylactic administration of hyperimmunized colostrum.

Support for SIgA on mucous membranes

Secretory IgA (SIgA) is the "defender" of mucous membranes in the intestines, respiratory tract, and urinary tract. Some studies have shown an increase in SIgA concentration in saliva after colostrum supplementation, but the results are inconsistent. Some meta-analyses did not show a statistically significant effect (Davison, Br J Nutr, 2021).

The mechanism of potential SIgA increase may be related to PRP modulating B lymphocytes in the mucous membranes of the gastrointestinal tract. These lymphocytes then migrate to other mucous membranes, including the respiratory tract. The hypothesis is attractive but requires further mechanistic studies.

Cytokine and inflammatory state modulation

Colostrum is not an "immune stimulant" in the simple sense. It acts more as an immunomodulator. PRP inhibit excessive production of pro-inflammatory cytokines IL-6 and TNF-alpha in situations of hyperreaction, but do not suppress a healthy response to pathogens. This is a key difference compared to immunosuppressive drugs.

In practice, this means that colostrum may be helpful for individuals with subclinical inflammatory activation (athletes during intense training, individuals with oxidative stress), but it does not replace therapy in active autoimmune diseases.

The immunological action of bovine colostrum in adults is mainly local. IgG neutralizes pathogens in the intestinal lumen, lactoferrin sequesters iron and inhibits the growth of E. coli, Klebsiella, and Candida (Lonnerdal, Am J Clin Nutr, 2003). Systemic action is limited by the digestive barrier.

What do clinical studies really show?

Research on colostrum has a long history, but methodological quality varies. The most highly regarded are Davison's meta-analyses from 2021, which included eight RCTs on athletes, and Ulfman's review from 2018 in Frontiers in Nutrition (Davison, Br J Nutr, 2021). Together, they included over 600 participants in various dosing protocols.

Davison 2021: 50% reduction in URTI in athletes

Glen Davison from the University of Kent conducted a meta-analysis of eight randomized studies on colostrum in endurance athletes. The total number of participants was 423. Doses ranged from 3-20 g per day for 4-12 weeks. The main outcome was a reduction in the incidence of upper respiratory tract infections by up to 50% in the colostrum groups (Davison, Br J Nutr, 2021).

The effect was strongest during periods of intense training (preparation for competitions). This is a time of increased physiological stress, when the "open window of immune function" increases susceptibility to URTI. Colostrum likely compensates for this risk by supporting the intestinal barrier and mucous membranes.

Limitation of the meta-analysis: different dosing protocols complicate comparisons. Some studies used 3 g, while others used 20 g. A clear dose-effect relationship was not established. Extrapolation to sedentary individuals is problematic because the athlete population has a specific immunological profile.

Ulfman 2018: comprehensive review in Frontiers in Nutrition

Henk Ulfman published a comprehensive review of the immunomodulatory properties of bovine colostrum in Frontiers in Nutrition in 2018 (Ulfman, Front Nutr, 2018). The work synthesizes data from studies on gastrointestinal infections, food allergies, diarrhea in children, and athletes.

The strongest evidence concerns the prevention of diarrhea in children in developing countries and the reduction of URTI incidence in athletes. Weaker but promising evidence relates to applications in non-specific inflammatory bowel diseases (IBD), irritable bowel syndrome (IBS), and food allergies. There is a lack of large RCTs with adequate statistical power.

Playford 2000: intestinal regeneration through EGF

Robert Playford's classic work from Imperial College London described the mechanisms of action of colostrum on the intestinal mucosa (Playford, Clin Sci, 2000). The main finding: colostrum, like human colostrum, contains trophic factors (EGF, TGF-beta) that accelerate the regeneration of enterocytes after damage.

The practical application of this study is NSAID-gastropathies. Standard doses of ibuprofen or aspirin increase intestinal permeability in the lactulose/rhamnose test. Colostrum at a dose of 10-20 g per day partially mitigated this effect in small pilot studies. This provides mechanistic evidence for "gut protection" applications.

How does colostrum affect athletes and recovery?

Endurance sports generate intestinal stress. Intense effort redistributes blood from the intestines to the muscles, causing temporary hypoxia of enterocytes. This increases intestinal permeability, known as exercise-induced "leaky gut." Davison showed that 20 g of colostrum over 14 days reduced this increase in permeability by 80% (Davison, Eur J Appl Physiol, 2016).

The intestinal barrier after exertion

The lactulose/rhamnose test is the standard for assessing intestinal permeability. Lactulose passes through intercellular "gaps," while rhamnose is absorbed normally. The L/R ratio increases after intense exercise, signaling damage to tight junctions. Colostrum significantly reduces this increase.

The mechanism is likely related to the delivery of trophic factors EGF and TGF-beta to the mucosa. These proteins support the synthesis of tight junction proteins, including zonulin and occludin. The net effect is faster recovery of intestinal "seals" after exercise.

Reduction of URTI during training

Endurance athletes have an increased risk of upper respiratory infections. The classic "open window" model describes a temporary suppression of immunity after intense exercise. Davison showed that colostrum supplementation over a 12-week period reduced the incidence of URTI by 28-50%, depending on the study.

A key detail: the effect was observed with adequate supplementation time (minimum 4 weeks) and a dose of at least 10 g per day. Shorter protocols or lower doses yielded smaller or statistically insignificant effects.

Impact on muscle recovery

The impact of colostrum on muscle recovery is less documented. Some studies show a slight reduction in muscle damage markers (CK, LDH) after exertion. Others do not show an effect. Results regarding muscle mass gain are inconsistent, although IGF-1 from colostrum could theoretically support hypertrophy (Mero, Nutrition, 2002).

Realistically: colostrum will not replace whey protein in hypertrophy. Its value for athletes lies mainly in protecting the intestinal barrier, reducing URTI, and supporting immunity during training stress. It is a "supplement," not a "main stack."

Unique observation: The rise in popularity of colostrum among athletes coincided with an increasing awareness of the "gut-immune axis." In the last five years, elite sports have begun to treat the gut as an element of preparation, not just nutrition. Colostrum works at the intersection of the gut and immunity, which is why it has found a niche in competition preparation protocols.

Realistic effects of colostrum: what works, what doesn't?

A realistic assessment of the effects of colostrum requires separating strong evidence from marketing promises. Solid evidence concerns the reduction of URTI incidence in athletes (50% in Davison's meta-analysis) and the protection of the intestinal barrier after exertion (Davison, Br J Nutr, 2021). Other effects are less certain and population-dependent.

What actually works

The first real effect is the protection of the intestinal barrier. This is a well-documented mechanism. It acts quickly (7-14 days) and is measurable in the lactulose/rhamnose test. The second is the reduction of URTI incidence in athletes and individuals during periods of high physiological stress (8-12 weeks). The third is the prevention of traveler's diarrhea with hyperimmunized colostrum.

The fourth effect, important in pediatrics, is the reduction of diarrhea episodes in children in developing countries. Here, the evidence is strong. In adults in developed countries, this effect is less visible because the baseline incidence of diarrhea is lower.

What works poorly or is unknown

Colostrum is not a "cure for allergies." Some studies show marginal effects on food allergies, but the data is inconsistent. Atopic dermatitis: no strong evidence. Asthma: no good RCTs. Alzheimer's disease: a few promising studies on PRP, but they require confirmation.

Muscle hypertrophy, "fat burning," "detoxification" – these are promises not backed by solid evidence. Marketing often suggests that colostrum is a "miracle substance" that works for everything. Realistically, it is a supportive supplement with specific applications.

What to expect after 8-12 weeks of supplementation

Realistic expectations after 8-12 weeks of 10-20 g per day: better gut tolerance, lower incidence of colds (especially in those training), possibly slight improvement in IBS and other digestive disorders. Do not expect a revolutionary change in energy, skin beauty, or weight loss. These effects are either undocumented or require entirely different interventions.

From our editorial team: Colostrum has been available in Polish pharmacies for over a decade, but the real boom came in 2022-2024 with the trend of "immune support post-pandemic." We observe that customers satisfied with colostrum are usually those who train (50%) or have gastrointestinal issues (30%). The remaining 20% are individuals seeking general immune support, whose expectations are often overestimated.

What form of colostrum is best?

The form of administration significantly affects the actual dose. Freeze-dried powder allows for doses of 5-20 g per day, consistent with clinical study protocols. Capsules of 0.5-1 g would require taking 10-20 pieces daily to achieve such doses. Lozenges have even lower doses. The choice of form should follow the target dose, not convenience (Ulfman, Front Nutr, 2018).

Freeze-dried powder

The powder is a "clinical" form. Used in most RCTs. Easy to dose 5-20 g per day. The price per gram is the lowest. The downside is the specific taste of colostrum, which some find off-putting. It can be dissolved in lukewarm water (not hot, to avoid destroying IgG), yogurt, juice, or protein shakes.

High-quality powder should be freeze-dried, not spray-dried. Freeze-drying preserves protein structure better. The quality standard is the declared concentration of IgG (e.g., a minimum of 25-30%) on the packaging, preferably with a certificate of analysis (COA) for the given batch.

Capsules

Capsules are convenient for those avoiding taste. The downside is the lower dose and higher price per gram. Standard capsules contain 400-600 mg of colostrum. A clinical dose of 10 g would require 17-25 capsules per day. Therefore, capsules are more suitable for small "maintenance" doses (1-2 g/d) rather than therapeutic protocols.

Tablets, gummies, and liquids

Lozenges allow for local action on the mucosa of the mouth and throat. Some manufacturers promote them as "support for URTI." However, the systemic dose is minimal. Liquid formulas are rare and require refrigeration. Gummies for children are a marketing form, with low doses.

What is the optimal dose of colostrum?

Most clinical studies use doses of 5-20 g per day, divided into 2-3 portions (Davison, Br J Nutr, 2018). Athletes during intense training received 20 g/day. Lower doses of 1-3 g are effective mainly locally in the intestines. The standard protocol for immune support is 10 g/day for 8-12 weeks.

Protocol for a sedentary person

A person without intense training, seeking immune support and gut health: 5-10 g of powder per day, divided into 2 portions (morning and evening). Duration: minimum 8 weeks. The first effects on the gut can be expected after 7-14 days, on immunity after 4-8 weeks.

Take on an empty stomach for maximum bioavailability. 30 minutes before a meal. Dissolve in warm water. Avoid hot tea, coffee, or milk, which can break down proteins. Milk proteins (casein) can also bind to IgG, reducing their bioavailability.

Protocol for an athlete

Endurance athlete, runner, cyclist, triathlete: 10-20 g per day during periods of intense training. Particularly important 4-8 weeks before competitions. One dose after training (2 hours post-exercise, when the intestines are "getting back to work"), the second in the morning or evening.

Strength athletes: doses of 5-10 g/day are sufficient. The main benefits are gut protection and reduction of URTI, not hypertrophy. Whey protein, creatine, and protein in general remain the foundation of the muscle stack. Colostrum is an addition, not a substitute.

Protocol for individuals with IBS or gut issues

Individuals with IBS, "leaky gut," or after antibiotic therapy: start with 1-3 g/d for a week to check tolerance. Then 5-10 g/d for 8-12 weeks. You can combine with probiotics Lactobacillus and Bifidobacterium. Colostrum does not contain live bacteria, so it does not compete with probiotics. It rather creates an "environment" conducive to the development of beneficial flora.

After antibiotic therapy: 10 g of colostrum + standard multi-strain probiotic for 4-6 weeks. This is a rational protocol for supporting microbiome recovery. There are no RCTs directly comparing this protocol with probiotics alone, but the mechanistic justification is strong.

The optimal dose of colostrum for adults is 5-20 g per day, depending on the goal. Endurance athletes achieved a reduction in URTI at 20 g/day, while doses of 5-10 g/day are sufficient for supporting immunity and gut health in sedentary individuals (Davison, Br J Nutr, 2021). Duration: minimum 8 weeks.

Safety, allergies, and contraindications

EFSA classifies bovine colostrum as a safe food ingredient in standard doses (EFSA, 2021). In studies with doses up to 60 g/day, no serious adverse effects were reported in the general population. The most common issues are mild: gastrointestinal discomfort in the first days (10-15% of cases).

Allergy to cow's milk proteins (CMPA)

The main contraindication is IgE-dependent allergy to cow's milk proteins (CMPA). It affects 1-3% of adults. Colostrum contains casein, beta-lactoglobulin, and other milk proteins that trigger reactions in sensitized individuals. There is no "hypoallergenic colostrum" in the classical sense. Individuals with CMPA should avoid bovine colostrum.

Goat colostrum has theoretical advantages for individuals with mild sensitivity, as it contains less alpha-S1-casein. Nevertheless, there is cross-reactivity in 50-90% of individuals with CMPA. Consultation with an allergist is advisable before trying.

Lactose intolerance

Colostrum contains 2-3% lactose, which is less than milk (4.8%). Most people with mild intolerance tolerate 5-10 g of colostrum daily. There are also "low lactose" products filtered with lactase. This is different from CMPA, as lactose intolerance is an enzyme deficiency, not an immune reaction.

Autoimmune diseases and immunosuppressive drugs

Individuals with autoimmune diseases (Hashimoto's, psoriasis, rheumatoid arthritis, MS) should consider colostrum with their doctor. Theoretically, immune modulation could affect disease progression, although data is limited. Patients after organ transplants or undergoing chemotherapy should avoid colostrum without consulting an oncologist.

Pregnancy and breastfeeding

There are no large studies on the safety of colostrum during pregnancy and breastfeeding. Manufacturers do not recommend use during these periods as a precaution. The risk is likely minimal, but the lack of RCT data justifies the recommendation to avoid.

Diabetics and kidney diseases

Colostrum contains small amounts of carbohydrates (mainly lactose), so its impact on glycemia is minimal. Type 2 diabetics can use colostrum without significant problems, although monitoring glycemia in the first weeks is reasonable. In kidney diseases, high protein doses can burden the kidneys, so individuals with chronic kidney failure should consult doses with a nephrologist.

Pasteurization vs. biological activity – does it matter?

The method of pasteurization significantly affects the preservation of the biological activity of colostrum. HTST pasteurization (High Temperature Short Time, 72 degrees Celsius, 15 seconds) retains 70-90% of IgG activity (Elfstrand, Int Dairy J, 2002). UHT sterilization (140 degrees, 4 seconds) destroys a significant portion of immunoglobulins.

Why HTST and not UHT?

Immunoglobulins and lactoferrin are proteins that denature at high temperatures. UHT, commonly used in food milk, causes extensive denaturation, retaining at most 30-40% of biological activity. HTST is gentler and allows for the preservation of most bioactive fractions. Therefore, colostrum supplements should come from the HTST process plus freeze-drying.

Freeze-drying vs spray drying

Freeze-drying (sublimation drying) preserves protein structure better than spray drying. The process occurs at low temperatures (below 25 degrees Celsius) under vacuum. The downside is the higher production cost. Spray drying is cheaper, but temperatures of 150-200 degrees can damage some bioactive proteins.

Looking at the label: "freeze-dried" or "lyophilized" is a good sign. "Spray-dried" in cheaper products likely indicates lower preserved activity. Some brands use a hybrid: low pasteurization + lyophilization, which preserves maximum activity.

How to check product quality

A good manufacturer declares the concentration of IgG (minimum 20-30% in premium powder), the source of the raw material (country, certificate), the pasteurization and drying process. COA (Certificate of Analysis) for each batch confirms the declared concentrations. The absence of such data is a warning sign.

Common mistakes made by colostrum consumers

Consumers often make mistakes that limit the effectiveness of colostrum. The most common are: too low a dose, too short a supplementation period, buying products of unknown origin, combining with hot drinks, and unrealistic expectations. Each of these mistakes reduces the chances of noticeable effects.

Mistake 1: too low a dose

Supplements in the form of 500 mg capsules often suggest a dosage of 1-2 capsules per day, which is 0.5-1 g. This is several times less than clinical doses. The effect at such doses is minimal, mainly local in the intestines. For immune support, doses of 5-20 g are needed, which realistically requires powder or a lot of capsules.

Mistake 2: too short a time

The "colostrum week" trial and assessment: "it doesn't work." Most effects require 4-12 weeks of regular use. Local action on the intestines appears faster (7-14 days), but immune support takes time for the immune system to adapt.

Mistake 3: hot water or coffee

Dissolving colostrum in hot water above 50 degrees Celsius denatures a significant portion of proteins. This frustrates a product that was rigorously protected during production. Use warm water or room temperature. Colostrum can be added to a chilled shake or yogurt.

Mistake 4: lack of quality verification

Some cheaper products contain added whey instead of real colostrum to cut costs. The IgG content can be significantly lower than declared. Choose manufacturers that publish COA and certificates of origin. Nordic and New Zealand brands usually have high standards.

Mistake 5: expecting miracles

Colostrum will not replace sleep, diet, training, or treatment of diseases. It is a supportive supplement, not a panacea. Realistic expectations are: better gut health, fewer colds, better recovery in athletes. Not: spectacular muscle gain, "detox," or curing chronic diseases.

Market observation: In 2026, the Polish colostrum market offers products ranging from 50 PLN for 100 g to 300 PLN for 100 g. The difference is mainly due to the production process (HTST plus freeze-drying vs spray-dry) and origin (local vs Nordic/New Zealand). Expensive does not always mean better, but products below 80 PLN/100 g often have lower declared IgG content.

Colostrum vs other immune supplements: comparison

The question of "colostrum or other supplements" often arises. Each of the popular immune products works differently. Vitamin D3 regulates the immune genome, zinc supports lymphocyte maturation, beta-glucans activate macrophages, probiotics affect the microbiome. Colostrum mainly works locally in the intestines and on mucous membranes.

Colostrum vs vitamin D3

Vitamin D3 has the strongest evidence for reducing respiratory infections in the general population. Martineau's meta-analysis from 2017 included 25 RCTs (10,933 people) and showed a 12% reduction in infection risk, with the strongest effect in individuals with D3 deficiency. Colostrum acts more on mucosal barriers and the intestines, less on systemic immunity.

This is not competition, but complementary actions. Many doctors recommend D3 as a foundation (1000-4000 IU/day) and colostrum as an addition for individuals with gut issues or those training intensively.

Colostrum vs probiotics

Probiotics deliver live bacteria (Lactobacillus, Bifidobacterium) to the intestines. Colostrum does not contain live bacteria but supports the gut environment conducive to the development of flora. The most rational approach is to combine both, especially after antibiotics. Colostrum works "from the host's side," while probiotics work "from the microbiome's side."

Colostrum vs beta-glucans and zinc

Beta-glucans from yeast (1,3/1,6) activate macrophages and dendritic cells. Zinc is essential for T lymphocyte maturation. Both have solid evidence for supporting immunity in deficiencies. Colostrum does not replace them but works through a different mechanism (mainly passive intestinal immunization).

In practice: if you have a zinc deficiency, supplement zinc. If you have gut issues and frequent infections, colostrum is a rational choice. They are different tools for different problems.

Frequently Asked Questions

How does colostrum differ from regular cow's milk?

Colostrum is the secretion from the mammary gland during the first 24-72 hours after giving birth. It contains 10-100 times more immunoglobulins than mature milk and significant amounts of lactoferrin (1-5 g/L), growth factors IGF-1, and proline-rich polypeptides (Ulfman, Front Nutr, 2018). The bioactive composition exceeds that of milk by up to 50 times.

Does colostrum really strengthen adults' immunity?

Davison's meta-analysis from 2021 included 8 studies and 423 athletes. Colostrum supplementation at a dose of 3-20 g per day reduced the incidence of upper respiratory tract infections by up to 50% during intense training periods (Davison, Br J Nutr, 2021). In sedentary individuals, the effect is weaker and less documented.

What is the optimal dose of colostrum for adults?

Most clinical studies use doses of 5-20 g per day, divided into 2-3 portions (Ulfman, Front Nutr, 2018). Athletes during intense training received 20 g/day. Lower doses of 1-3 g are effective mainly locally in the intestines. The standard protocol is 10 g per day for 8-12 weeks.

Does pasteurization destroy the active ingredients of colostrum?

HTST pasteurization (72 degrees Celsius, 15 seconds) retains 70-90% of IgG activity depending on conditions (Elfstrand, Int Dairy J, 2002). Freeze-drying after low-temperature pasteurization preserves most bioactive proteins. UHT sterilization destroys a significant portion of immunoglobulins, which is why supplements should come from the HTST process plus freeze-drying.

Does colostrum help with gut issues and leaky gut syndrome?

Colostrum contains epidermal growth factor EGF and transforming growth factor TGF-beta, which support the regeneration of the intestinal membrane (Playford, Clin Sci, 2000). In a study on endurance athletes, 20 g of colostrum per day for 14 days reduced the increase in intestinal permeability after exertion by 80% in the lactulose/rhamnose test (Davison, Eur J Appl Physiol, 2016).

Can individuals with lactose intolerance use colostrum?

Colostrum contains 2-3 times less lactose than milk (about 2-3% vs. 4.8%). Most individuals with mild intolerance tolerate doses up to 10 g per day. Individuals with IgE allergy to cow's milk proteins (CMPA) should avoid colostrum, as it contains casein and whey proteins (EFSA, 2021).

How long does it take for colostrum to start working?

Local action on the intestinal membrane is observed after 7-14 days (Playford, Clin Sci, 2000). The impact on mucosal immunity, measured by SIgA concentration in saliva, usually requires 4-8 weeks of regular supplementation. Full clinical effects, including reduction of URTI, are documented after 8-12 weeks of use (Davison, Br J Nutr, 2021).

Is colostrum safe with medications and chronic diseases?

EFSA classifies bovine colostrum as a safe food ingredient in standard doses (EFSA, 2021). Individuals with autoimmune diseases, taking immunosuppressive drugs, or undergoing chemotherapy should consult supplementation with a doctor. There is a lack of data for pregnant women, which is why manufacturers do not recommend use during this period.

Does colostrum contain hormones harmful to adults?

Colostrum contains growth factors IGF-1 (200-2000 ng/g) and EGF, but they are digested in the stomach by over 90%, so minimal amounts reach the bloodstream (Mero, Nutrition, 2002). Natural levels of IGF-1 in the blood do not change significantly after a standard dose of 20 g. Lonnerdal described the rapid degradation of milk proteins in the gastrointestinal tract (Lonnerdal, Am J Clin Nutr, 2003).

What form of colostrum is best – powder or capsules?

Freeze-dried powder allows for doses of 5-20 g per day, which are consistent with clinical study protocols (Davison, Br J Nutr, 2021). Capsules usually provide 0.5-1 g each, so achieving therapeutic doses requires 10-20 capsules. Powder is cheaper per gram but has a characteristic colostrum taste.

Summary: is colostrum worth it for adults?

Bovine colostrum is a well-documented supplement with specific applications, not a magic substance. The strongest evidence concerns the reduction of upper respiratory tract infections in athletes (50% in Davison's meta-analysis) and the protection of the intestinal barrier after exertion (Davison, Br J Nutr, 2021). Other effects are promising but require larger studies.

Realistically, it is worth considering colostrum if: you train for endurance, have gut issues, are post-antibiotic therapy, or travel to areas at risk of traveler's diarrhea. The standard protocol is 5-20 g of freeze-dried powder per day for 8-12 weeks. Choose HTST pasteurized plus freeze-dried products with declared IgG concentration.

It is not worth expecting colostrum to be a "cure-all." Muscle hypertrophy, "detox," spectacular effects on skin or energy are promises not backed by solid evidence. Colostrum is a supportive supplement, not a substitute for sleep, diet, training, and treatment.

If you have an allergy to cow's milk proteins, are pregnant, or taking immunosuppressive drugs, consult your doctor first. For most healthy adults, colostrum is safe in standard doses. It is a rational option for specific applications, not a health revolution.

This article is for informational and educational purposes and does not constitute medical advice. Before starting colostrum supplementation, especially in cases of food allergies, autoimmune diseases, pregnancy, breastfeeding, or taking medications, consult your doctor or clinical dietitian.

Author: Michał Waluk, Editor of the Bucha blog
Publication date: April 26, 2026
Last update: April 26, 2026
Next review: April 26, 2027