Above Half of the CBD products available online contain a different amount of cannabidiol than the label declares These are the conclusions of a study published by Johns Hopkins Medicine, which analyzed 105 CBD products sold online. The CBD supplement market in Poland is growing rapidly: according to Statista, it was worth approximately $95 million in 2025, and Euromonitor International forecasts the entire hemp segment to grow to PLN 2.2 billion by 2026. However, this rapid growth attracts both reputable producers and sellers offering low-quality or mislabeled products. Cannabidiol (CBD)—a non-psychoactive compound derived from hemp (Cannabis sativa L.)—can be a valuable supplement to your daily diet, but only if you make an informed choice. This step-by-step guide explains what to look for before purchasing a CBD supplement: from legal status, to quality certificates, to real-world interactions with medications. If you've ever wondered whether more expensive CBD oil actually differs from cheap CBD oil, after reading this article, you'll know how to find out for yourself.

What is CBD and why it's not the same as marijuana

Cannabidiol (CBD) is one of over 100 phytocannabinoids naturally occurring in hemp. The molecular formula for CBD is C₂₁H₃₀O₂—identical to THC (tetrahydrocannabinol), but with a different arrangement of atoms, resulting in completely different biological effects. CBD does not cause psychoactive effects, does not cause euphoria or a „high” and does not cause physical dependence – this was confirmed by the World Health Organization (WHO) in its 2018 Critical Review Report.

CBD works by endocannabinoid system (ECS) — a biological signaling system discovered between 1988 and 1992, present in all vertebrates. The ECS regulates the body's homeostasis: pain, mood, sleep, appetite, immune response, and many other physiological processes. This system consists of CB1 receptors (mainly in the central nervous system) and CB2 receptors (mainly in immune cells), endocannabinoids produced by the body (anandamide and 2-AG), and metabolic enzymes. CBD does not bind directly to CB1 and CB2 receptors, but acts as a negative allosteric modulator, inhibiting the FAAH enzyme (increasing anandamide levels), activating the 5-HT1A serotonin receptor, and stimulating the TRPV1 vanilloid receptors. In total, scientists have identified over 65 molecular targets of CBD (Almeida and Bhatt, 2020, Pharmacology Research & Perspectives).

CBD vs. THC – the most important differences

Characteristic	CBD	THC
Psychoactivity	None - does not cause euphoria	Yes - it gives you a high„
Addictive potential	None (WHO, 2018)	Yes, approx. 30% users
Legal status in Poland	Legal (with conditions)	Controlled substance
Approved drug	Epidiolex (epilepsy)	Dronabinol, nabilone (synthetic)
Limit on products	Max 0.3% THC in final product	—

Hemp oil pressed from seeds (hemp seed oil) and CBD oil are two completely different products—this difference is crucial for Polish consumers. Hemp seed oil does not contain cannabinoids and does not exert any of the effects associated with CBD. CBD oil is produced from the inflorescences and leaves of the plant and contains cannabidiol in measurable concentrations. Some untrustworthy sellers deliberately exploit this ambiguity—so always look for the specific amount of CBD expressed in milligrams on the label, not just the term "hemp oil.".

CBD Legal Status in Poland - What's Allowed and What's Not

CBD is not a controlled substance in Poland. The Act on Counteracting Drug Addiction of July 29, 2005 (LPNA) does not list CBD as a prohibited substance. Hemp (Cannabis sativa L.) is a legal industrial plant provided that the THC content in the inflorescences does not exceed 0.3% dry matter — this threshold was increased to 0.2% by the amendment of 7 May 2022, harmonising Polish regulations with the reform of the EU Common Agricultural Policy.

The key regulatory barrier is EU Regulation 2015/2283 on Novel Food. CBD extracts are classified as a novel food because they were not significantly consumed in the EU before May 15, 1997. Sales as dietary supplements or fortified foods require prior authorization by the European Commission, based on a safety assessment by the European Food Safety Authority (EFSA). As of March 2026, EFSA had not authorized any CBD products—over 200 applications had been submitted, 17 were under active evaluation. This means that CBD food products and dietary supplements operate in a regulatory gray area: technically unauthorized, but widely tolerated by regulators.

The landmark judgment of the Court of Justice of the EU in Case C-663/18 (Kanavape) of November 19, 2020, determined that CBD is not a drug within the meaning of the UN Convention and benefits from the free movement of goods within the EU. This judgment significantly strengthened the legal position of CBD sellers throughout the EU. Market supervision in Poland is carried out by the Chief Sanitary Inspectorate (GIS), the Chief Pharmaceutical Inspectorate (GIF), and the Office of Competition and Consumer Protection (UOKiK). Any claims of therapeutic or healing effects are prohibited. CBD products are a violation of EU Regulation 1924/2006 on health claims. A product whose packaging or advertising promises "treatment," "cure," or "therapy" should immediately raise consumer concern.

CBD cosmetics have a much cleaner regulatory path—cannabidiol is approved as a cosmetic ingredient in the European CosIng database and falls under EU Regulation 1223/2009 on cosmetic products. CBD cosmetics do not require Novel Food authorization and can be legally sold after completing standard notification procedures.

How to Choose a Good CBD Product - What to Look for on the Label and in the Documents

Certificate of Analysis (CoA) Issued by an independent, accredited laboratory (ISO/IEC 17025 standard), this is the only reliable way to verify the quality of a CBD product. A reputable manufacturer will provide a CoA on their website or upon request—if it's not available, the product should be disregarded. The batch number on the CoA must match the one on the product packaging: only then does the document actually correspond to the product being purchased.

What a good CoA certificate must contain

Cannabinoid profile — actual CBD, THC, CBG, CBN content; THC level must be ≤0.2% (or ≤0.3% according to new regulations) in the final product
Heavy metals — arsenic, cadmium, lead, mercury; hemp is a bioaccumulator and can absorb toxins from the soil
Pesticides — especially important for products from non-organic crops
Solvent residues — crucial for butane or propane extraction
Microbiological contamination — mycotoxins, E. coli, Salmonella

A Johns Hopkins Medicine study found that of 105 CBD products sold online, only 24% were correctly labeled18% contained less CBD than declared, while 58% contained more than indicated on the label. Incorrect dosing can result in no effect (too little CBD) or unexpected side effects (too much CBD). Ubucha.pl only offers products with valid CoA certificates from accredited laboratories.

How to Calculate Your Actual CBD Dose

A large number of milligrams on the label typically indicates the total CBD content in the bottle, not the amount in a single dose. To calculate the concentration per milliliter, divide the total amount of CBD by the volume of the bottle: a 10ml bottle with a concentration of 10% contains 1000 mg CBD, which translates to approximately 5 mg of CBD per drop (using a standard pipette of ~1 ml = 20 drops). Dosage should always be expressed in milligrams per day—not as a percentage or in drops without conversion.

CBD Extraction and Spectrum - How Products Difference

The method of extracting CBD from the plant determines the purity, composition and safety of the final product. Supercritical CO₂ extraction It is considered the industry's gold standard: it produces a very pure extract without toxic solvent residues, is reproducible, and scalable. Its drawback is the high investment cost of the equipment, which translates into a higher product price. Ethanol extraction This proven alternative has been used in pharmaceuticals for centuries. It extracts both polar and non-polar compounds, yielding a full-spectrum extract. However, it requires a step to remove residual ethanol. Products extracted with butane or propane may contain toxic hydrocarbon residues and should be avoided, especially if the manufacturer does not provide CoA with residual solvent testing.

Full Spectrum, Broad Spectrum, and Isolate – What to Choose?

Extract type	Contents	THC	For whom?
Full spectrum (full spectrum)	CBD + other cannabinoids + terpenes + flavonoids	Trace (≤0.2%)	People looking for an entourage effect without drug testing
Wide spectrum (broad spectrum)	CBD + other cannabinoids + terpenes, THC removed	None or traces	People who are sensitive to THC or are subject to drug testing
CBD isolate	Pure CBD (≥99%)	Lack	Precise dosing, tasteless applications, people on medication

Deadline entourage effect describes the hypothesis that cannabinoids, terpenes, and flavonoids act synergistically—the effectiveness of the entire extract is greater than the sum of its components. This concept was coined by Raphael Mechoulam and Shimon Ben-Szabat in 1998 (European Journal of Pharmacology). A study by the Lautenberg Center at the Hebrew University (2015) found that the full-spectrum extract was more effective than the pure isolate in a mouse inflammatory model. At the same time, a 2023 systematic review (PMC10452568) found that there is no solid evidence from human clinical trials confirming the entourage effect — the theory is scientific and promising, but still not definitively confirmed in randomized controlled trials.

Practical tip: A true full-spectrum oil is dark in color (greenish-brown) and has a distinct, slightly bitter taste. A clear, colorless oil is most likely CBD isolate suspended in a carrier oil—even if the label claims otherwise. CoA verification: A true full-spectrum oil shows the presence of multiple cannabinoids (CBG, CBN, CBC), not just CBD.

What the Science Says About CBD - A Review of Clinical Studies

The strongest and best documented clinical evidence for CBD's effectiveness concerns treatment of drug-resistant epilepsy. The landmark randomized, placebo-controlled trial by Devinsky et al. (2017, New England Journal of Medicine, n=120) showed that purified CBD at a dose of 20 mg/kg/day reduced the frequency of seizures in patients with Dravet syndrome by 39% vs 13% in the placebo group (p=0.01). Based on these studies, the U.S. Food and Drug Administration (FDA) approved Epidiolex on June 25, 2018, the first plant-based, purified CBD medicine. The European Medicines Agency (EMA) approved Epidiolex for the EU in 2019.

In the area anxiety and stress The growing evidence base is promising, although studies tend to have small sample sizes. A systematic review by Blessing et al. (2015, Neurotherapeutics, NYU School of Medicine) concluded that "preclinical evidence strongly supports CBD as a treatment for generalized anxiety disorder, social anxiety disorder, PTSD, and panic disorder." A meta-analysis by Han et al. (2024, Psychiatry Research, 8 RCTs, n=316) confirmed a statistically significant effect of CBD on anxiety levels (Hedges' g = −0.92). The study by Shannon et al. (2019, The Permanente Journal, n=72) showed a decrease in anxiety scores (HAM-A scale) in 79.2% patients in the first month of CBD use.

Evidence regarding sleep are preliminary and inconsistent. The Shannon et al. (2019) study reported improved sleep in 66,7% patients in the first month, but results fluctuated over subsequent months of follow-up. A systematic review by Suraev et al. (2020, Sleep Medicine Reviews) found "insufficient evidence for routine clinical use" but noted that preliminary data warranted further research. pain and inflammation Polish scientists from the Medical University of Białystok (Atalay et al., 2019, Antioxidants) have shown that CBD inhibits the transcription factor NF-κB and activates Nrf2, demonstrating antioxidant and anti-inflammatory effects in cell models. Human studies in pain remain limited.

CBD Safety – Drug Interactions and Contraindications

The WHO concluded in a 2018 report that CBD "is generally well tolerated and has a good safety profile." However, The most serious safety concern with CBD is drug interactions — a phenomenon many consumers are unaware of. CBD is a potent inhibitor of cytochrome P450 enzymes, specifically CYP2C19, CYP3A4, CYP2C9, CYP2D6, and CYP2E1. These enzymes are responsible for the hepatic metabolism of approximately 80% of all prescription medications.

Clinical study by Bansal et al. (2023, Clinical Pharmacology & Therapeutics, n=18) showed that CBD increased omeprazole exposure by 207% (CYP2C19), losartan by 77% (CYP2C9), midazolam by 56% (CYP3A), and caffeine by 39% (CYP1A2). Systematic review from 2024 (Frontiers in Pharmacology) identified over 400 medicines as substrates of enzymes inhibited by CBD. Particularly dangerous interactions include:

Warfarin — documented increase in INR to life-threatening values (case report by Grayson et al., 2018, Epilepsy & Behavior Case Reports); dose reduction by 20–31% necessary
Tacrolimus — three-fold increase in drug concentration (Leino et al., 2019, American Journal of Transplantation); used, among others, by transplant patients
Clobazam — increase in the level of the active metabolite by 500% (Morrison et al., 2019); risk of excessive sedation
Statins metabolized by CYP3A4 — atorvastatin, simvastatin; risk of myopathy and rhabdomyolysis
Antiepileptic drugs — valproate may increase the hepatotoxicity of CBD

Rule of thumb: If a drug has a warning about interacting with grapefruit, there is a high probability of interacting with CBD. — both inhibit CYP3A4. This applies to over 85 medications. However, CBD also inhibits enzymes that grapefruit does not inhibit (CYP2C19, CYP2C9), so the grapefruit test is not exhaustive. Anyone taking prescription medications should consult a doctor or pharmacist before starting CBD supplementation. Effects may vary from person to person, especially in the context of individual genetic polymorphisms of cytochrome P450 enzymes.

Absolute contraindications include pregnancy (the FDA strongly advises against; animal studies have shown fetal anomalies), breastfeeding (CBD detected in breast milk up to 6 days after last use), use in children without the supervision of a specialist, and active liver disease (CBD is metabolized in the liver at over 70%). EFSA, in its updated safety report from 2026, set the provisional safe level of CBD isolate consumption at just 2 mg/day (0.0275 mg/kg bw/day) with a large uncertainty factor, indicating significant gaps in the available long-term safety data.

How to Recognize a Good CBD Seller – Red Flags and Green Signals

The CBD market in Poland—as across Europe—is uneven in terms of quality. A 2024 Grand View Research study indicates that e-commerce is the dominant sales channel for CBD products in Poland, which, while ensuring availability, also complicates product verification. Knowing what to look for can help you distinguish a reliable manufacturer from a seller offering a low-quality product in just a few minutes. Check out the ubucha.pl guide to choosing CBD oil, where we discuss specific brands available in Poland.

Warning signs - avoid products if:

The manufacturer does not provide a CoA certificate or the CoA is not verifiable (no batch number, no laboratory data)
The label states "hemp extract" or "Cannabis sativa seed oil" without specifying the specific amount of CBD in milligrams.
The product is suspiciously cheap – good quality CBD oil 10% (1000 mg) cannot cost 30–40 PLN; the production cost of CO₂ extraction is much higher
The advertisement or packaging promises to "treat," "cure," or "cure" any disease.
The seller does not provide the registered office address or contact details
The product is purchased from a vending machine or from an anonymous seller with no review history

Green signals – choose the product if:

A current CoA (no older than 12 months) from an independent, ISO 17025 accredited laboratory is available
The manufacturer provides the extraction method (CO₂ or ethanol) and the source of the raw material (country of cultivation, variety)
Hemp comes from organic or certified crops (e.g. EU Organic)
The packaging clearly shows the expiration date and batch number.
The seller has a transparent returns policy and available customer service

At ubucha.pl, every CBD product we offer has been verified for the availability of analytical certificates and consistency of the manufacturer's declarations with laboratory test results. Browse our selection of CBD oils with filters by concentration, extraction method, and spectrum type. You can read more about how we verify products before they are released for sale in the article "How ubucha.pl verifies CBD products.".

Frequently asked questions

Is CBD legal in Poland?

Yes, CBD is legal in Poland. Cannabidiol is not listed as a controlled substance in the Act on Counteracting Drug Addiction. CBD products sold as dietary supplements operate in a regulatory gray area—the lack of EU Novel Food authorization makes them technically unauthorized, but they are generally tolerated by regulators. CBD cosmetics have the clearest legal path. The 2020 CJEU judgment (Kanavape Case C-663/18) confirmed that CBD is not a drug under EU law.

How much CBD should you take per day?

There's no universal CBD dose that works for everyone. The recommended approach is a "start low, go slow" strategy: start with 10–20 mg of CBD daily, increasing by 5 mg every few days to monitor your body's response. The UK Food Standards Agency (FSA) recommends not exceeding 70 mg of CBD daily for healthy, non-pregnant adults. In 2026, the EFSA established a provisional safe level for CBD isolate at just 2 mg/day, indicating gaps in safety data. Consult your doctor before determining the dosage if you're taking other medications.

How to read a CBD oil label to avoid being fooled?

On a CBD oil label, look for: the specific amount of CBD in milligrams (e.g., 1000 mg), not just the percentage; information about the extract type (full-spectrum, broad-spectrum, or isolate); extraction method; country of origin of the hemp; batch number and expiration date. The phrase "Cannabis sativa seed oil" or "hemp seed oil" without the CBD amount indicates hemp oil pressed from seeds, which does not contain cannabinoids. Always request access to a CoA certificate from an independent laboratory.

Does CBD interact with medications?

Yes, CBD can interact clinically with many medications. CBD inhibits cytochrome P450 enzymes (primarily CYP2C19, CYP3A4, and CYP2C9), which metabolize approximately 80% prescription medications. A 2024 systematic review identified over 400 medicinal substances that potentially interact with CBD. Interactions with warfarin, tacrolimus, clobazam, and statins are particularly dangerous. Anyone taking prescription medications should consult a doctor or pharmacist before starting CBD supplementation.

What is a CoA certificate and why is it important when purchasing CBD?

A Certificate of Analysis (CoA) is a document issued by an independent, accredited laboratory (ISO/IEC 17025 standard) confirming the composition and purity of a specific batch of CBD product. A good CoA includes a cannabinoid profile (including THC levels), test results for heavy metals, pesticides, solvent residues, and microbiological contamination. A Johns Hopkins Medicine study found that only 24% of CBD products sold online are properly labeled. The CoA is the only way to independently verify the manufacturer's claims—without it, you're buying the product blind.

What is the difference between full spectrum CBD oil and isolate?

Full-spectrum CBD oil contains cannabidiol along with other naturally occurring cannabinoids (CBG, CBN, CBC), terpenes, and flavonoids, as well as trace amounts of THC (≤0.21 TP3T). CBD isolate is a pure, isolated form of cannabidiol (≥991 TP3T), devoid of other plant compounds. Full-spectrum proponents cite the "entourage effect"—a synergy of ingredients first described by Mechoulam (1998). Isolate offers more precise dosing, is tasteless, and has zero risk of a positive drug test; it is preferred by individuals on medication or undergoing drug testing.

Why CBD Doesn't Work - Common Causes

The lack of effect after using CBD is most often due to four reasons: firstly — too low a dose or too short a period of use (CBD usually requires 2–3 weeks of regular use); secondly — purchasing a product with incorrect labeling that contains less CBD than declared on the label (this applies even to 18% products according to Johns Hopkins Medicine); thirdly — choosing a product form with low bioavailability (sublingual oil has a bioavailability of 13–19%, capsules approximately 6–19%, gummies even less); fourthly — individual differences in cannabinoid metabolism, dependent on genetic polymorphisms of CYP450 enzymes.

Natural CBD supplements in Poland represent a category with real health potential, yet also carry a significant risk of purchasing a poor-quality or incorrectly labeled product. A conscious consumer should follow three key rules: verify the CoA certificate from an independent laboratory, check for THC content below the legal limit, and consult a doctor before starting supplementation if taking prescription medications. The lack of a CoA certificate or a seller's refusal to provide one should be a warning to avoid purchasing—regardless of the attractive price or convincing advertising.

Science confirms CBD's promising properties in treating drug-resistant epilepsy (the strongest evidence from RCTs), supporting anxiety (a growing evidence base), and potentially providing anti-inflammatory benefits (primarily preclinical data). However, EFSA clearly indicates that many questions regarding its long-term safety remain unanswered—therefore, treating CBD as a simple, risk-free dietary supplement would be unjustified. The growing Polish CBD market, estimated by Grand View Research at over $63 million in 2024 with growth forecasted to continue until 2030, requires increasing consumer awareness. Discover a carefully selected range of natural CBD supplements at ubucha.pl—products with full laboratory documentation, transparent composition, and certified raw material origin.