VITAMINS & SUPPLEMENTS · GUIDE
Pre-Workout Banned Substances and Sport Testing Risks
Which stimulants found in some pre-workouts are prohibited in sport or illegal in supplements, how contaminated products cause positive tests, and what WADA, USADA and FDA say.
Content last updated . This page has not been medically reviewed.
Back to Pre-Workout Supplements: What They Contain, Ingredient by IngredientIngredients that appear in some pre-workouts
| Substance | What the sources say | Source and year |
|---|---|---|
| DMAA (methylhexaneamine) | FDA: DMAA-containing products marketed as dietary supplements are illegal. [3] WADA: prohibited in-competition as a specified stimulant. [1] | FDA, 2018 page; WADA 2026 list |
| Higenamine | WADA: prohibited as a non-selective beta-2-agonist and found in some supplements. [1] | WADA, 2026 |
| Caffeine and synephrine | WADA lists both in its 2026 Monitoring Program, and says these are not considered prohibited substances. [1] | WADA, 2026 |
| Creatine | ISSN states creatine is found in high amounts in the food supply and is not banned by any sport organization. [4] | ISSN, 2017 |
"Not prohibited" is not "safe". FDA says DMAA can raise blood pressure and lead to cardiovascular problems, and that it has no information showing DMAA is safe. [3] A review of case reports linked synephrine-containing pre-workouts to chest pain, palpitations and fainting, with caffeine as a possible confounder. [5] A stimulant not expressly listed in the WADA stimulant section is treated as a specified substance. [1] WADA notes methylhexaneamine is known by many different names, so a banned ingredient may not look familiar. [1]
How a clean-looking label still causes a positive test
USADA has seen three patterns. The label lists a prohibited substance that tests do not find. The label lists ingredients that are not prohibited, yet testing finds a prohibited substance. And repeat testing finds different ingredients in different batches of the same product. [2] USADA adds that it is well documented that some supplements have been contaminated or spiked with performance-enhancing drugs. [2] It reports that some pre-workout or energy products contain illegal stimulants such as DMAA or ephedra. [2] NCCIH adds that FDA has found prescription drugs in products sold as dietary supplements. [6]What testing and certification can and cannot do
- WADA says it is not involved in testing dietary supplements. [1]
- WADA says quality assurance schemes can help reduce, but not eliminate, the risk of an inadvertent doping infringement. [1]
- USADA says FDA does not analyze safety, efficacy or label accuracy of supplements before they are sold. [2]
- A certification does not show a product works or is right for you.
For what testing programs check, see quality testing and certifications and sports certification and banned-substance contamination.
Health safety, separate from sport rules
A product can pass a sport test and still be unsuitable. Ask a clinician or pharmacist if you take medicines, have a heart, kidney or liver condition, are pregnant, are under 18, or face surgery. [6] See medication interactions, side effects and who should avoid pre-workout.Frequently asked questions
Is DMAA legal in pre-workouts?
FDA says DMAA-containing products marketed as dietary supplements are illegal and marketing them violates the law. [3]
Can a pre-workout make me fail a drug test?
Yes, it can. USADA documents products whose tested contents differed from the label, including undisclosed prohibited substances. [2]
Is caffeine banned in sport?
On WADA's 2026 list, caffeine is in the Monitoring Program and is not considered a prohibited substance. [1] Check the rules of your own sport.
Does third-party certification make a product safe for athletes?
WADA says quality assurance schemes can reduce, but not eliminate, the risk. [1]
Is creatine banned?
ISSN says no sport organization bans it, because creatine is found in the food supply. [4]
References
- WADA: The Prohibited List and Q&A (2026 list). Read 2026-10-23.
- USADA: Supplement Connect. Read 2026-10-23.
- FDA: DMAA in Products Marketed as Dietary Supplements (August 2018 text; content current 02/22/2023). Read 2026-10-23.
- ISSN position stand: safety and efficacy of creatine supplementation (accepted 2017). Read 2026-10-23.
- Review of Case Reports on Adverse Events Related to Pre-workout Supplements Containing Synephrine, Cardiovascular Toxicology 2023. Read 2026-10-23.
- NCCIH: Using Dietary Supplements Wisely. Read 2026-10-23.