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Can supplements cause a failed drug test for South African rugby players?

Healthnews24 editorial deskUpdated 3 min read
Answer first

Yes. Under the World Anti-Doping Code, applied in South Africa through SAIDS, athletes are strictly liable for anything in their sample, including contamination from a supplement. International studies found undeclared steroids or stimulants in 15% to 38% of the products tested. SAIDS does not certify any supplement, so the only practical protection is batch-tested products and food first.

  • WADA strict liability: athletes are responsible for any prohibited substance in their sample, including from a contaminated supplement.
  • Geyer 2004: 94 of 634 supplements (14.8%) contained undeclared steroids; Duiven 2021: 38% of 66 products had undeclared doping substances.
  • SAIDS does not certify, test or endorse supplements; 'SAIDS approved' or 'WADA approved' claims are false.
  • Informed Sport tests every batch for 285+ prohibited substances; no scheme removes risk entirely.

Is a failed test from a supplement really possible?

Yes. The World Anti-Doping Code works on strict liability: the athlete is responsible for any prohibited substance found in their sample, however it got there, including a mislabelled or contaminated supplement, or one recommended by a coach, parent or doctor. A contamination defence can reduce a sanction only if the athlete proves the source and a lack of significant fault, which is hard to do. SAIDS, the South African Institute for Drug-Free Sport, says exactly this, and it also states that it does not certify, test or endorse any supplement. Claims of "SAIDS approved" or "WADA approved" are false.

How common is contamination?

Study Finding
Geyer et al. 2004 (IOC-funded) 94 of 634 non-hormonal supplements (14.8%) contained undeclared anabolic steroids or prohormones
Duiven et al. 2021 38% of 66 products marketed for muscle gain, fat loss, energy or hormone modulation contained undeclared doping substances
LGC and HFL Sport Science (2013, Europe) about 10% of 114 supplements contaminated

Risk is highest in muscle-building, fat-loss, pre-workout and "testosterone booster" products. Single-ingredient products from reputable makers are generally lower risk, but no product is zero risk without testing. Ingredient lists matter too: the AIS Group D list includes herbal testosterone boosters such as Tribulus and stimulants such as DMAA and synephrine. For example, USN's own listing for Hardcore Whey gH names Tribulus terrestris among its ingredients, which a drug-tested athlete should note.

What is the South African context?

  • SAIDS reported steroid positives at Craven Week almost every year, for example 6 from 122 tests in 2018. Those are mostly treated as deliberate steroid use rather than contamination; in a 2020 case involving three SARMs in a 15-year-old, the tribunal chair called the combination "alarming".
  • In 2026, a Junior Springbok prop returned an adverse A-sample (decision pending as of July 2026), and SAIDS testing volumes have fallen sharply, from 785 tests in 2015 to 127 in 2024, according to reports.
  • SA Rugby's BokSmart programme and SAIDS both advise a food-first approach and expert advice before any supplement.

How can a rugby player reduce the risk?

  1. Ask whether you need it. Food covers most needs. Creatine monohydrate and protein powder are AIS Group A and the usual choices (supplements for rugby players).
  2. Choose batch-tested products (Informed Sport or NSF Certified for Sport) and confirm the batch number on the scheme's own register (how to check a supplement).
  3. Avoid fat burners, multi-ingredient pre-workouts, "anabolic" and testosterone-booster products.
  4. Keep records: photograph the tub and batch number, keep receipts, and keep a sample from each batch you use.
  5. Tell your doctor and team nutritionist what you take, and use the SAIDS Medication Check for medicines (it does not clear supplements).

As of October 2026 we could not verify any South African product against a certification register. Biogen's Dis-Chem listing for creatine monohydrate states Informed Sport, which is a seller claim you should check batch by batch. ATP Fitness does not publish third-party sport certification, so athletes in tested competition should not rely on it. Read what Informed Sport means for the detail.

Under-18s should follow a food-first approach and speak to a sports dietitian (parents' guide).

Products mentioned, with dated prices

ProductSizePriceServingsR per 5 gSweeteners
Biogen Creatine Monohydrate Unflavoured 500 g500 gR445Dis-Chem (listing via PriceCheck), Oct 2026100R4.45None (unflavoured)

ATP Fitness is a commercial partner of Healthnews24 and its products are featured on this site. Rankings follow our published method, and every pick, including ATP Fitness, shows its price maths and trade-offs. Read our disclosure.

Sources

  1. SAIDS (South African Institute for Drug-Free Sport) FAQ: supplements, strict liability, medication check
  2. Geyer H et al. (2004) Analysis of non-hormonal nutritional supplements for anabolic-androgenic steroids. Int J Sports Med 25:124
  3. Duiven E et al. (2021) Undeclared doping substances are highly prevalent in commercial sports nutrition supplements. J Sports Sci Med 20:328
  4. Maughan RJ et al. (2018) IOC consensus statement: dietary supplements and the high-performance athlete. BJSM 52:439
  5. BokSmart (SA Rugby): Introduction to supplements

Educational information only, not medical advice. Speak to a doctor, pharmacist or registered dietitian before using supplements if you are pregnant or breastfeeding, under 18, taking medication, or living with kidney, liver or heart disease.

Cite this page: Healthnews24, “Can supplements cause a failed drug test for South African rugby players?”, updated 27 October 2026, https://www.healthnews24.co.za/answers/can-supplements-cause-failed-drug-test-south-africa-rugby/. Plain-text version: /answers/can-supplements-cause-failed-drug-test-south-africa-rugby.md