Proteins

Plant protein is a category of supplements that includes proteins from hemp, peas, rice, soy, and multi-ingredient blends — ideal for vegans, vegetarians, and anyone looking to supplement their diet with pure, well-absorbed protein free from lactose and dairy allergens. On this page, you will find a practical guide: what distinguishes individual sources of plant proteins, how to choose the right formula, how to dose the supplement, and an overview of available products at Bucha.

How to choose plant protein?

The plant protein market is growing rapidly — according to a 2023 report by Grand View Research, the global plant protein segment reached a value of over 14 billion USD and is expected to grow at a rate of over 7% annually. Despite this abundance of offerings, many people buy supplements randomly, guided only by taste or price. A few specific criteria help make the right decision.

Amino acid profile — the most important parameter of plant protein

Plant protein differs in the content of essential amino acids (EAA), especially leucine, which initiates muscle protein synthesis. Pea protein is exceptionally rich in leucine (about 8.0 g/100 g of protein) — comparable to whey. Hemp protein, on the other hand, offers a complete profile of all 9 EAA and omega-3 and omega-6 fatty acids in a 3:1 ratio, which is rare among protein sources. Rice protein is the lowest in lysine but is also the best tolerated by people with sensitive intestines. Blends (e.g., pea + rice) balance these shortcomings and are usually the best choice as a daily plant protein supplement.

Protein content per serving

Check the weight of protein per scoop — it should be at least 20 g according to EFSA for an anabolic effect. Products labeled as “high-protein” but containing less than 15 g per serving are a typical purchasing mistake — read the nutrition table, not the front of the package.

Additional active ingredients

Some formulas enrich the composition with extracts of functional mushrooms, B vitamins, probiotics, or digestive enzymes. CPB Protein from Solve Labs follows this trend — it includes unique yeast protein and extracts of adaptogenic mushrooms, which elevates the product profile beyond standard protein powder.

Certifications and purity of composition

Organic hemp protein has an ecological certification, which means no pesticides, GMOs, or synthetic plant protection products. For athletes participating in competitions, certifications like Informed Sport or Cologne List confirming the absence of doping substances are important.

Who is plant protein for?

This supplement is suitable for vegans and vegetarians looking for a complete source of EAA, for those intolerant to lactose or milk protein, for athletes preferring a clean label, and for anyone wanting to increase their daily protein intake without burdening the digestive system. It is not necessary for those whose diet provides sufficient amounts of protein from solid foods.

Available products — plant protein at Bucha

u Bucha, in the plant protein category, you will find both classic hemp protein and modern multi-ingredient vegan formulas.

Organic Hemp Protein 200 g (35 PLN) is pure, certified organic plant protein sourced from hemp seeds. It contains a complete profile of 9 essential amino acids, omega-3 and omega-6 fatty acids, and dietary fiber. The product contains no THC — hemp seeds are subject to EU regulations requiring THC content below 0.3%, and it is practically absent in the seeds themselves. The 200 g format is an ideal option to start. The natural, slightly nutty flavor pairs well with oatmeal, smoothies, and baked goods.

The CPB Protein from Solve Labs series is available in three flavor variants of 500 g each: Vanilla, Salted Caramel, and Pumpkin Spice priced at 89 PLN each (comparable prices in the premium segment). The formulas combine plant protein from four sources with unique yeast protein — Saccharomyces cerevisiae contains all EAA and beta-glucans that support immunity. The addition of extracts from functional mushrooms (including lion’s mane, reishi) makes CPB Protein a product that straddles the line between a supplement and an adaptogenic supplement. It is an excellent alternative for those looking for a more complex action profile than typical plant protein.

Plant proteins — a guide to protein sources

Before reaching for a supplement, it is worth understanding where the proteins in the powder come from and what properties they have. Below, four main sources used in supplements are discussed.

Hemp protein

Produced from seeds or the cake left after pressing hemp oil. It contains 30 to 50 percent protein depending on the degree of processing, plus dietary fiber and significant amounts of magnesium, iron, and zinc. The amino acid profile is a rare, complete structure among plants — all nine EAA are present. A study published in Journal of Agricultural and Food Chemistry (2010) confirmed the high digestibility of hemp protein (PDCAAS above 91%). The slightly nutty, earthy flavor is best masked in fruit smoothies or oatmeal.

Pea protein

Isolate from yellow peas is now standard in vegan supplements. It usually contains over 80% protein with a PDCAAS of 0.89, is richer in BCAA than hemp protein, and significantly lower in fats. Leucine — a critical amino acid for mTOR and myofibril synthesis — is present at a concentration of about 7–8 g per 100 g of protein. A study by Babault et al. published in Journal of the International Society of Sports Nutrition showed that pea protein at a dose of 25 g/d for 12 weeks resulted in comparable muscle mass gain to whey in men exercising with weights.

Rice protein

Isolate from brown rice contains over 80% protein measured by the DIAAS method, but is low in lysine — making mixing it with pea or hemp protein crucial. Its advantage is minimal allergy risk, nearly zero FODMAP content, and very good tolerance in people with IBS. Combined with pea protein, the DIAAS of the entire formula approaches that of an egg (1.13).

Multi-ingredient blends and yeast protein

The premium direction in vegan proteins is blending: combining several sources of plant protein to achieve an amino acid profile close to the gold standard. CPB Protein from Solve Labs goes a step further by adding yeast protein — Saccharomyces cerevisiae — which, in addition to a complete EAA profile, brings beta-1,3/1,6-glucan. This polysaccharide is known for modulating the immune response: a review by Wouters et al. indicates that 0.5 to 3 g of beta-glucan daily can reduce the incidence of upper respiratory infections in active athletes.

Amino acids, BCAA, and leucine — what to look for in plant protein composition

BCAA (branched-chain amino acids) are the trio of leucine, isoleucine, and valine. They are metabolized directly in the muscles, bypassing the liver — hence their importance in sports nutrition. Leucine acts as an anabolic switch activating the mTORC1 pathway responsible for muscle protein synthesis. In pea protein, the level of BCAA is about 17–19 g per 100 g of protein (Norton and Layman, 2012) — comparable to whey.

Besides BCAA, it is worth paying attention to glutamine — an amino acid that supports gut and immune system recovery. Studies by Newsholme (1990) linked glutamine deficiencies to reduced immunity in marathon runners. Arginine — a precursor to nitric oxide (NO) — is present in hemp protein at a higher concentration than in whey. Methionine and cysteine are best covered by hemp seeds, as they are the only popular plant protein providing these sulfur-containing amino acids in full.

Did you know that supplementing isolated BCAA without adequate intake of other EAA may be less effective than regular high-quality plant protein? Wolfe’s review in JISSN (2017) indicates that BCAA in isolation stimulate mTOR less effectively than a complete EAA profile — therefore, high-quality plant protein is a better investment than BCAA supplements.

How to prepare a plant protein shake

Preparing a good shake takes just a few minutes. Below you will find a proven step-by-step procedure.

1. Step one — measure the powder portion. Pour one scoop of your chosen plant protein into a shaker or blender cup. One serving usually provides a full net protein pool for one meal.
2. Step two — choose a liquid base. Add about a cup of plant milk (oat, almond, hemp) or water. Plant milk thickens the shake and increases the caloric content — useful for bulking. Water is better for cutting.
3. Step three — enrich the nutritional profile. Optionally add a banana (completes lysine), a tablespoon of peanut butter (healthy fats, leucine), or a handful of spinach (iron, vitamin K). Spinach does not change the flavor of the shake.
4. Step four — mix. Shake the shaker for several seconds or blend for half a minute. Plant proteins tend to clump — a blender gives a better consistency than a shaker.
5. Step five — time to consume. Drink after training. Aragon and Schoenfeld (2013, JISSN) confirmed that total daily intake of plant protein is more important than timing, but the post-workout window favors muscle protein synthesis.

Safety and contraindications

Plant proteins are considered safe for healthy adults. People with kidney diseases should consult increased protein intake with a doctor, as protein metabolism burdens the kidneys more than carbohydrates or fats. Pea, rice, and hemp proteins are among the least allergenic sources and are safe for those with lactose, gluten, or soy intolerance. Pregnant and breastfeeding women should ensure adequate protein intake, but before reaching for supplements, it is advisable to talk to their healthcare provider. Read more about the interactions of plant supplements with medical therapy in our article on microdosing protocols. Children under fourteen should not use protein supplements without the guidance of a clinical dietitian.

Dosing plant protein

According to a meta-analysis by Morton et al. (2018) published in British Journal of Sports Medicine, the optimal protein dose for muscle mass building is 1.62 g/kg of body weight per day. Above this value, the incremental effect flattens. For a person weighing seventy kilograms, the supplement can provide about one-quarter of the total daily intake; the rest should come from food: legumes, tofu, tempeh, nuts, grains.

General rules for the safe use of plant protein:

• Start with one serving per day for one to two weeks to assess stomach tolerance. Plant proteins are generally well tolerated, but pea protein may cause slight bloating at first.
• Do not exceed two servings per day — excess protein burdens the kidneys in individuals with existing insufficiency, according to research by Martin et al. (2005).
• Stay properly hydrated — protein metabolism requires additional water to excrete nitrogen through the kidneys. At least 2 liters of water daily (EFSA) is recommended.

So how to plan supplementation? A simple formula: in the morning, add hemp protein to oatmeal, after training, CPB Protein in a shake — together they cover the supplemental needs, the rest from the diet. This scheme is well tolerated by most adults using plant protein daily.

This page is for informational and educational purposes and does not replace consultation with a doctor. If you are pregnant, breastfeeding, taking medications, or have chronic conditions, consult the use of supplements or herbs with a specialist.