Swimmers and Supplements: It’s at Your Own Risk

Heyo—fair warning: This article is for debate and information and is not medical advice. Talk to your physician or dietitian before you start smashing some SuperXTREME toilet-cracking pre-workout, mmkay? This isn’t a “Get off my lawn!” post decrying supplements as a whole, or a guide on how to supplement—it’s meant as a warning to swimmers of the inherent risk of snatching a positive doping test from dirty supplements.

You work your butt off in the pool. You show up every day to practice. You do everything right outside of the water too–get lots of sleep, eat well, work on your mental training and crush it in the gym.

In your search for an edge and ever-faster swimming you look towards supplements.

The promises are so good it’s impossible to pass up. 200% more energy! 357% more awesome! 192.72% more jacked!

Supplements often come packaged with names that exemplify what kind of super sweet awesomeness you should expect with ingestion: Muscle Bomb. GRIND. Wreckage. Assault. Powder Burn. Rhino Rush. Black Mamba. Brutal. Maxxout. LIT. Bodyhacker. And my personal favorite… PSYCHOTIC.

Besides sounding like Friday night’s starting line up at the monster truck rally, a lot of these supplements are pure and utter garbage. And if throwing your money away for a case of the jitters and some indigestion wasn’t bad enough, there’s that whole testing positive on a pee test.

But I get it. I’ve tooled around with plenty different supplements over the years. I am old enough that creatine was widely thought of as a “steroid” when I was in high school and was still taboo.

The reasons that athletes use supplements include:

  • To help ward off illness and injury. Supplements can be viewed as medicinal. Often they are taken in the forms of multi-vitamins (who hasn’t taken a handful of vitamin C when they feel the onset of a cold?), but supplements like ginseng and guarana are common as well.
  • Boost in energy. One of the biggest draws for supplementing is the boost in energy and focus (around 40% of the young elite athletes in this study took some sort of energy-boosting supplement). Swimmers take pre-workouts to sharpen focus and get a surge in energy. Energy drinks (like Red Bull) are also often used as ergogenic aids and stimulants.
  • To make up for a less-than-rad diet. Supplements are commonly used to make up for shortcomings in diet and nutrition. Magnesium and iron are examples.
  • And of course, to improve sport performance. Supplements like protein, creatine, pre-workouts, vitaimins, and energy drinks all promise to improve performance in some manner. The net effect of these promised benefits is that you will perform faster, recover quicker, and possibly even become better looking.

Rolling the dice with contaminated supplements

Although supplement makers will happily boast that they make products for the elite athlete, none are regulated and few are third-party tested to the point that you wouldn’t fail a USADA/WADA pee test.

A lot of this is because the supplement business is still the wild west when it comes to ingredients and production.

The field of “dietary supplements”—which includes powders, herbs, liquids, gel caps, etc—goes to market without any checking of purity or safety by the FDA. Because the threshold to go to market is so low, any yokel with a kitchen can throw together a “proprietary formula” and market it as the next big super performance enhancer.

When a problem does eventually arise, the burden isn’t on the producer of the supplement to support their claims, it’s on the FDA to take them to court and prove it’s unsafe.  With little governmental regulation supplement makers can be liberal with the claims of their product.

Swimmers and Contaminated Supplements

The number of anti-doping violations that swimmers have incurred over the years reflects the risk that they run by taking this stuff.

Here are three of the biggie ones:

In July of 2018 American national team member Madisyn Cox tested positive for 4 nanograms of trimetazidine (a drug designed to “energize and revive damaged heart tissue”*) and was handed a two year suspension.

After having her multi-vitamin—Cooper Complete Elite Athletic multivitamin—tested for impurities, traces of trimetazidine—which itself isn’t FDA approved—were found in both opened and unopened samples. Cox had listed the multi-vitamin on her anti-doping forms from day one, covering a span of seven years. Her suspension was later reduced to six months.

The Cooper Elite Multi-Vitamin is marketed straight at “elite” athletes, is physician formulated …and yet, elite athletes get drug tested. All. The. Time. Since this whole thing went down with Cox the product has been pulled from their website.

In 2008 Jessica Hardy was on the verge of realizing every swimmer’s dream—to represent their country at the Olympics. At Trials that year she had qualified for four events later that summer in Beijing.

While at a training camp preparing for the Games she learned she’d failed a doping test, her sample coming back for clenbuterol, a banned substance that expands bronchial muscles (it’s used to treat asthma) and promoting increases in lean muscle mass [1][2].

Issued a two-year ban Hardy had to give up her spot on the Olympic team. (In a cruel twist, the swimmer who would have moved up to qualify for the Beijing team, Tara Kirk, was unable to be named to the team. By the time the suspension had been handed down the entry deadline for the meet had passed.)

Hardy would later have her sentence reduced to a year when she was able to show that the positive test was a result of a contaminated supplement she had been taking. In the ruling, the American Arbitration Association found that the supplement makers had made assurances of the product’s purity, and that the positive test had been a result the supplement, Advocare Arginine Extreme (a pre-workout), being contaminated.

Advocare even had Hardy and the products she was using on their website as one of their “endorsers.” This was quickly removed in the weeks following her positive test.

Irvine Novaquatics swimmer Kicker Vencill was suspended for two years at the beginning of 2003, missing the Pan Am Games that summer and Olympic Trials the following year, after ingesting a contaminated multi-vitamin.

This particular supplement, Ultimate Nutrition Super Complete (what is with the names of these products…), when tested later was found to contain threedifferent steroid precursors. Vencill would successfully sue the makers of the supplement, getting just under $600,000 in damages in 2005.

Vencill kept swimming, returning to the pool at US nationals in Irvine after serving his suspension. “I wanted to prove something,” he said. “I wanted to show that I wouldn’t quit, not even after two years of living hell.”

Despite his return, the stigma of that positive test was hard to wash off.

“I would step on the deck and I would feel people were boring holes through me,” he said.

Cooking in the dark

Supplement makers are generally not the best when it comes to quality control. Although unintentional doping tests happen infrequently (think of the thousands and thousands of athletes who are tested weekly across all sports and the billions of dollars in supplements taken annually) would suggest that supplement contamination is a one-in-a-million kind of situation, that is not the case.

One meta-analysis took a group of 23 studies whose mission was to identify illicit substances in supplements. A staggering 12-58% of dietary supplements from the studies included substances that were banned by WADA.

Yes, read that again and let it absorb into your chlorinated brain: Rates of contamination varied from 12–58% in supplements tested. If that doesn’t scare the chlorine out of your shorts I don’t know what would.

The Takeaway

I’m not naïve enough to believe that supplements are going away any time soon. Especially when there is the promise of a better performance in a scoop. And there’s clearly a place for them in specific situations.

But you have to be aware of what you are putting into your body. It’s clear that the producers of these supplements generally don’t give a chlorinated backstroke flag about what happens to the end user. For the makers of supplements they want the best of both worlds: to market to elite athletes and produce their stuff in a sub-standard manner.

“Not knowing” also won’t fly. Ingesting a tainted supplement might not get you the full 4-year sentence that comes with getting busted with a needle hanging from your butt, but as the story of Kicker Vencill illustrates, once you are labeled as a doper the stink is almost impossible to wash off no matter how much money you win in damages.

The anti-doping and governing bodies are also skeptical of initial explanations of unintentional doping, as the policy of strict liability tells swimmers that they are responsible for what’s in their bodies, no matter how it gets there.

We can blame poor quality control and lack of regulation all we want, but reasonable efforts have to be made on your end to make sure that you aren’t the one holding a positive drug test at the end of your next competition.

The key thing to remember?

You can’t out-supplement poor effort. Supplements aren’t somehow going to make up for poor attendance, low levels of focus in training, make you mentally tougher or magically improve your technique.

Take a step back and view the word “supplement” for what it is—something that should be considered once you are crushing the things that will truly make a difference to your performance in the pool. There’s no powder on earth that is going to make up for soft commitment, no matter how Xtreme the label or extravagant the gainz that are promised.

Supplement & Doping Resources for Swimmers

Here are some resources for swimmers and supplements:

  • USA Swimming’s Doping Control. The governing body for American swimming has a list of resources for swimmers, coaches and parents to better inform what’s expected of chlorinated athletes.
  • NSF Certified for Sport. NSF International is an organization that tests supplements to see if what’s on the label is in the bottle. They also have an app so you can scan a barcode the next time you are in your local supplement shop.
  • Informed Choice. Another third-party supplement testing service, they have a list of certified brands and products that you can search.
  • USADA Drug Reference Line. USADA runs a telephone line that you can call on weekdays to speak to an expert that will answer questions on supplements, drugs, and therapeutic use exemptions. They also run Supplement 411, an education and awareness resource on supplements.
  • Global DRO. The Global Drug Reference Online website gives athletes a run down on the status of various drugs and medications according to the current WADA prohibited list.


Olivier Poirier-Leroy is a former national level swimmer. He’s the publisher of YourSwimBook, a ten-month log book for competitive swimmers.

Conquer the Pool Mental Training Book for SwimmersHe’s also the author of the recently published mental training workbook for competitive swimmers, Conquer the Pool: The Swimmer’s Ultimate Guide to a High Performance Mindset.

It combines sport psychology research, worksheets, and anecdotes and examples of Olympians past and present to give swimmers everything they need to conquer the mental side of the sport.

Ready to take your mindset to the next level?

Click here to learn more about Conquer the Pool.

COACHES: Yuppers–we do team orders of “Conquer the Pool” which include a team discount as well as complimentary branding (your club logo on the cover of the book) at no additional charge.

Want more details? Click here for a free estimate on a team order of CTP.

Leave a Reply

Notify of
oldest most voted
Inline Feedbacks
View all comments
Will Jonathan
3 years ago

The fact is, it’s been scientifically proven that supplements are mostly nothing more than a placebo. They don’t improve performance or provide any kind of statistical benefit in any way.



“For the majority of adults, supplements likely provide little, if any, benefit.”


It’s the same with pre-workout supplements. Swimmers often swear by taking pre-supplement’s before races, but it’s been proven to be nothing more than a placebo.

“Neither of the pre-workout supplements significantly outperformed the placebo. There may have been a slight performance improvement for the male participants in the study,… Read more »

SUM Ting Wong
3 years ago

If they would put the cocaine back into Coke we would not need this stuff. We would all be faster & a dash of the original Burgundy wine , we’d have the recovery covered too .

3 years ago

At least I know I can purchase with confidence a swimsuit that doesn’t violate any rules.

3 years ago

There is only one supplement that you can know is clean, safe, and effective with 100% certainty. It’s been out a while, and had its popularity but has fallen off the radar recently. It’s called Powerthirst and it gives you gratuitous amounts of energy and makes you good at sports. Here’s a quick youtube video explaining the benefits:


Mimi Forster
3 years ago

Thorne Research has a large number of NSF Certified for Sport supplements used by US national teams. Their quality is impeccable–each product tested four times for contamination. Check those out.

Justin Wright
Reply to  Mimi Forster
3 years ago

That’s only part of the issue. One of the biggest issues is that in a matter of months anyone could introduce a supplement to the market and make basically any claims they want.

I’m not saying that each product ISN’T tested four times before going on a shelf, I’m just pointing out that there isn’t any way to know that for sure because the supplement market is essentially completely unregulated.

Regardless, I have trouble believeing each batch is put into a mass spectrometer (and other required equipment necessary for testing) and analyzed four seperate times. Even then, what regulations are they following? NCAA? USADA? Some other organization with different rules? It’s a dangerous game to play for generally unverified benefits.

3 years ago

This is not anything but your opinion

Justin Wright
Reply to  Jon
3 years ago

Not sure what you mean Jon. Seemed like a fairly objective break down facts. There is currently no practical way to know exactly what you are putting in your body when you ingest a supplement.

Care to try and rebuttle that statement? If you have information on how I can safely consume my supplements with peace of mind, I would be truly grateful to here it.

3 years ago

This includes a section on supplements. http://taylorhooton.org It is a parents mission to make sure kids don’t end up like their son.

About Olivier Poirier-Leroy

Olivier Poirier-Leroy

Olivier Poirier-Leroy has been involved in competitive swimming for most of his life. Starting off at the age of 6 he was thrown in the water at the local pool for swim lessons and since then has never wanted to get out. A nationally top ranked age grouper as both a …

Read More »