Are All Supplements Created Equal? What to Look For.

The supplement aisle can feel like a minefield — dozens of brands, big promises and price tags that range from “bargain bin” to “should I sell my bike for this?” As a sports dietitian, I’ve seen the best and worst of what’s out there, and I can tell you not all supplements are created equal. Here’s how to tell the difference between products that support your performance and those that could put it at risk.

The Red Flags No Athlete Should Ignore

South Africa’s sport supplement industry remains poorly regulated. A South African Medical Journal commentary noted that many products are still marketed as food and escape rigorous oversight even though some contain potent ingredients¹. Products that make medicinal claims (e.g., hormone boosters or fat‑loss agents) are meant to be treated as medicines and fall under the Medicines and Related Substances Act, while other powders (e.g., whey proteins) are regulated as foods¹. Because enforcement lags behind the market, some manufacturers can make bold claims or add undeclared stimulants without consequence.

Strict liability means that if metabolites of banned substances are found in an athlete’s sample, intent doesn’t matter². In other words, even accidentally ingesting a contaminated supplement could lead to a positive doping test. This is why contamination cases — not deliberate cheating — still derail careers.

Certifications That Matter

South African athletes should look for independent certifications, SAHPRA classifies complementary medicines as either high risk or low risk. Only low‑risk health supplements (those aimed at general health enhancement, maintenance or relief of minor symptoms) are allowed to be called supplements, and they must use substances and dosages from SAHPRA’s approved lists³. Products that make medicinal claims must be registered as medicines¹. In addition, the below certifications increase athlete's peace of mind:

• Informed Sport and NSF Certified for Sport®: test every batch for hundreds of World Anti‑Doping Agency (WADA)‑prohibited substances.
• Good Manufacturing Practice (GMP) certification: indicates the facility meets strict quality and cleanliness standards.
• Lastly, ask whether the product is registered with SAHPRA or has been tested by a SANAS‑accredited laboratory.

If a brand can’t answer these questions or provide documentation, that’s a red flag.

The R50 vs R500 Question — Is It All Just Marketing?

Big-name brands with celebrity endorsements can charge more, but price differences also reflect ingredient quality and manufacturing standards. Higher‑priced products often use cleaner raw materials, include clinically effective dosages and undergo third‑party testing. Cheaper products may cut corners by using inferior protein sources, unnecessary fillers or underdosed “label decoration” ingredients. Given the strict liability standard², spending a bit more for a product that has been batch‑tested and properly dosed is an investment in your safety.

How to Spot Quality Issues

1. Unrealistic claims. If a product promises extreme results (“Gain 10 kg of muscle in a week” or “Incinerate fat instantly”), be sceptical. The AMA Journal of Ethics notes that such advertising often indicates the product might contain a banned substance or be misleading².
2. Poor mixability or odd taste. Clumping, separation or off flavours could signal low‑grade ingredients or contamination.
3. Digestive issues or energy crashes. Bloating, cramps and sudden drops in energy suggest poor formulation.
4. Incomplete labelling. Supplements in South Africa must list all ingredients and dosages. Hidden “proprietary blends” make it impossible to know what you’re taking.
5. Lack of batch numbers or certification logos. A missing batch number means there’s no traceability.

Ingredients Athletes Should Avoid

Because supplements are not reviewed pre‑market and are considered safe until evidence suggests otherwise², many risky compounds slip through. Be especially wary of:

• Non‑approved stimulants such as DMAA, DMHA, phenpromethamine and related analogues. Peer‑reviewed analysis of weight‑loss and sports supplements found nine prohibited stimulants (including deterenol, oxilofrine and higenamine) in commercially available products².
• Prescription diuretics and masking agents. Cases of supplements contaminated with diuretics like bumetanide have been documented².
• Anabolic agents or hormone modulators. Studies have uncovered anabolic steroids and designer steroids in over‑the‑counter supplements².
• Herbal extracts with no human research. Without peer‑reviewed studies, the safety and efficacy of novel plant compounds are unknown.

The Truth About Dosing (and Label Decoration)

Many products list impressive ingredients on the label but include them in amounts far below the effective dose — a practice known as label decoration. Remember, supplements aren’t evaluated like medicines². To avoid underdosed formulas, compare the listed dose to what’s been used in research, and choose brands that disclose exact quantities for each ingredient. If the product hides behind a proprietary blend, think twice.

Quick At‑Home Checks

While only lab tests can reveal contamination, you can do a few simple things:

• Mix test. Dissolve a scoop in water. High‑quality powders should mix smoothly without excessive residue.
• Smell and taste. Sour or chemical odours (while still in date) can be a warning sign.
• Ingredient review. Read the entire ingredient list. New or unfamiliar compounds should be researched — the AMA article urges consumers to know each ingredient and be aware that new compounds often lack pharmacology or toxicology data².
• Look up batch numbers. Reputable brands provide batch codes that correspond to testing certificates.

Questions to Ask Before You Buy

• Is it third‑party tested? Ask for evidence (certificate or database listing) of Informed Sport or NSF certification.
• Where and how is it manufactured? GMP facilities and SAHPRA registration indicate quality controls.
• Are full ingredient amounts listed? Avoid proprietary blends.
• Can you show recent lab results? Transparency builds trust.

Fuel Lab’s Approach

At Fuel Lab, we don’t stock anything we wouldn’t recommend to our own athletes. Every product must meet our Vetting Checklist:

• Evidence‑based formulas at effective doses.
• Third‑party testing (Informed Sport, NSF or SANAS‑accredited labs) for banned substances.
• GMP‑compliant manufacturing facilities.
• Full label transparency.
• Alignment with SAHPRA guidelines for low‑risk health supplements³.

If a brand doesn’t meet these standards, we won’t sell it — even if it’s popular.

Real Talk: Better No Supplements Than Bad Ones

Because athletes are held strictly liable for what’s in their bodies², using a cheap or untested supplement could cost you your career. If you can’t access a high‑quality, tested product, focus on whole foods. Lean meats, dairy, legumes, grains, fruits and vegetables can meet most nutrient needs.

Finding the Sweet Spot Between Budget and Quality

You don’t need the most expensive brand, but you do need to prioritise quality. Start with a few essentials (e.g., protein powder, electrolytes, carbohydrate supplements) from certified brands. Mid‑range, third‑party‑tested products often offer the best value. You can also save by buying in bulk, choosing subscriptions or using whole foods (oats, milk, nuts) where possible. The key is to invest in fewer, better products rather than a cupboard full of cheap ones.

By paying attention to regulation, science and quality, you can make supplement choices that genuinely support your performance — without risking your health or eligibility.

Ready to Fuel Smarter?

At Fuel Lab, we take the guesswork out of sports nutrition. Every product you’ll find here has been hand-picked by dietitians, batch-tested for safety, and proven to perform. No gimmicks. No shortcuts. Just trusted fuel that helps you train harder, recover better, and race stronger.

Take our personalised supplement quiz, explore our curated bundles, and join a community of athletes who are fuelling smarter.