Fake Sports Supplements: How to Spot Them
A tub of protein or pre-workout bought at a suspiciously low price may contain far less of the active ingredient than promised, cheap fillers, or even substances banned in sport. Counterfeiting and contamination are distinct problems, but both put your health and, for competitive athletes, your career at risk. Our editors explain how to spot the warning signs.
Counterfeit versus contaminated: two different problems
A counterfeit supplement imitates a genuine branded product. It may be packed in a copied tub with a near-identical label, but the contents are made by someone else, usually with no quality control at all. Counterfeiters target popular brands because they sell quickly.
A contaminated or adulterated supplement may be sold under its genuine brand name but contain substances not declared on the label. Sometimes this is accidental cross-contamination in a factory; sometimes it is deliberate spiking with stimulants, anabolic agents or prescription drugs to make a product "work".
An international study by Geyer and colleagues analysed over 600 non-hormonal supplements bought in 13 countries and found that around 15% contained undeclared anabolic-androgenic steroids or prohormones. Products from the UK were among those affected.
Cohen and colleagues later showed that even after official recalls in the United States, many supplements remained on sale and still contained banned drugs. Reviews by Martínez-Sanz and colleagues and by Outram and Stewart confirm that the problem is persistent and global.
Warning signs on the packaging
Packaging is the first place to look. Counterfeiters have become skilled, but small details often give them away. Compare the tub with images on the official brand website or with a product you know is genuine.
- spelling mistakes, poor grammar or blurred printing on the label;
- missing or inconsistent batch numbers and best-before dates;
- a seal under the lid that is absent, loose or of a different design;
- hologram stickers or QR codes that do not verify on the brand's own system;
- no UK or EU address for the food business operator responsible;
- labels in a language not normally used for that market, or overstickered labels.
In the UK, food supplements must carry the name and address of the responsible business, the recommended daily dose, a warning not to exceed it, and the statement that supplements should not replace a varied diet. Missing mandatory information is a strong red flag.
Claims also matter. Phrases such as "steroid alternative", "anabolic", "SARM" or "legal clenbuterol" are major warning signs. Products marketed with such language are disproportionately likely to contain prohibited or unlicensed substances.
| Check | Genuine product | Suspicious product |
|---|---|---|
| Price | Consistent with market | Far below usual retail price |
| Seal and lid | Intact, consistent design | Missing, glued or different |
| Batch and expiry | Clearly printed, verifiable | Missing, smudged or mismatched |
| Label claims | Authorised wording | "Anabolic", "steroid-like", dramatic promises |
| Seller | Brand or authorised retailer | Unknown marketplace seller, social media |
Warning signs in the product itself
Once opened, the product itself can reveal problems. Protein powder from a reputable brand usually has a consistent colour, smell and texture across batches. Clumping, unusual smell, a gritty texture or poor mixing compared with your usual tub may indicate a fake or a degraded product.
Taste is less reliable, as manufacturers change flavour systems, but a dramatic difference is worth noting. Capsules that differ in colour, size or printing from previous packs should raise suspicion.
Your body can also give clues. Pre-workouts or fat burners that cause racing heart, severe anxiety, insomnia or unusual sweating may contain undeclared stimulants. Rapid strength gains, acne or changes in libido after a "natural" product could signal hidden anabolic agents.
If you experience side effects you suspect are caused by a supplement, stop using it and seek medical advice. Adverse reactions can be reported to the MHRA through the Yellow Card scheme, which also covers suspected problems with some food supplements and herbal products.
Where the risk is highest
Not all supplements carry the same risk. Basic products such as plain whey protein, creatine monohydrate or a standard multivitamin from established brands are relatively low risk. Higher risk categories, according to the IOC consensus statement on dietary supplements (Maughan and colleagues, 2018), include:
The sales channel matters as much as the product. Online marketplaces with third-party sellers, social media accounts, gym-floor "contacts" and websites that appear and disappear quickly are the main routes for counterfeit and adulterated products in the UK.
Imported products are another concern. Supplements made for other markets may contain ingredients not permitted in the UK, or be labelled in ways that do not comply with UK rules. Products claiming to be pharmaceutical-grade but sold as supplements should be treated with particular caution.
Products sold far below the usual retail price, especially through sellers with no verifiable business address, are among the most frequent subjects of consumer complaints to Trading Standards.
How to protect yourself
Buy from the brand directly or from established retailers who are authorised stockists. If an offer seems too good to be true, it usually is. Check that batch numbers and expiry dates are present and plausible.
Competitive athletes face strict liability under anti-doping rules: you are responsible for any prohibited substance found in your sample, regardless of how it got there. UK Anti-Doping advises athletes to assess the need for any supplement, assess the risk and assess the consequences.
Third-party testing schemes, such as Informed Sport, test batches of products for a wide range of substances prohibited in sport. Certification reduces but does not eliminate the risk. Athletes should keep records of batch numbers and receipts.
Finally, suspected counterfeit products can be reported to local Trading Standards through the Citizens Advice consumer service, and unsafe food products can be reported to the Food Standards Agency.
Conclusions of the editorial team
Counterfeit and contaminated supplements are a documented problem, with studies finding undeclared steroids and stimulants in a notable share of products tested.
Packaging details, price, seller and marketing language are the most useful clues. Higher-risk categories include muscle builders, weight-loss products and pre-workouts.
Buying from trusted sources and using third-party tested products are the best defences. If you are interested in this topic, read our articles on creatine monohydrate forms, on how anti-doping strict liability works, and on reading supplement labels.
References
- Geyer H, Parr MK, Mareck U, et al. Analysis of non-hormonal nutritional supplements for anabolic-androgenic steroids — results of an international study. Int J Sports Med. 2004;25(2):124–129.
- Maughan RJ, Burke LM, Dvorak J, et al. IOC consensus statement: dietary supplements and the high-performance athlete. Br J Sports Med. 2018;52(7):439–455.
- Cohen PA, Maller G, DeSouza R, Neal-Kababick J. Presence of banned drugs in dietary supplements following FDA recalls. JAMA. 2014;312(16):1691–1693.
- Martínez-Sanz JM, Sospedra I, Ortiz CM, et al. Intended or unintended doping? A review of the presence of doping substances in dietary supplements used in sports. Nutrients. 2017;9(10):1093.
- Outram S, Stewart B. Doping through supplement use: a review of the available empirical data. Int J Sport Nutr Exerc Metab. 2015;25(1):54–59.
