The History of ZMA: How the Supplement Became Popular

ZMA is one of the few sports supplements with a clear 'date of birth' and a specific author. The combination of zinc, magnesium, and vitamin B6 traveled from the laboratory of a small Californian company to the shelves of every sports store in the world. The editorial team traced how this happened and why the history of ZMA is an instructive example for anyone who reads marketing promises.

Background: Minerals and Sport Before ZMA

Interest in zinc and magnesium in sports science arose long before the branded formula appeared. As early as the 1980s and 1990s, physiologists noted that intense training increases mineral losses through sweat and urine, and that the diet of some athletes, especially those on restrictive diets, does not cover the need for these elements.

Zinc was known as a cofactor of hundreds of enzymes, a participant in protein synthesis, immune system function, and reproductive function. A study by Prasad and colleagues (1996) showed that in people with zinc deficiency testosterone levels decrease, and correcting the deficiency helps normalize it. This work later became one of the scientific arguments in ZMA marketing.

Magnesium was studied as a mineral necessary for energy metabolism, muscle contraction, and relaxation. A review by Lukaski (2000) summarized that physical exertion increases the need for magnesium and zinc, and that marginal deficiency can impair performance.

Thus, by the end of the 1990s, there was an entirely logical hypothesis: if athletes often fall short of zinc and magnesium, and these minerals are linked to hormonal status and recovery, then replenishing them may be beneficial. It remained only to package this idea into a product.

The Birth of the Formula and the Trademark

The ZMA formula was developed by Victor Conte, founder of the Californian company BALCO (Bay Area Laboratory Co-Operative), which was engaged in analyzing athletes' mineral status. The SNAC System company, associated with Conte, registered ZMA as a trademark in the late 1990s. The name stands for 'zinc magnesium aspartate.'

The classic formula per daily serving contained 30 mg of zinc in the form of monomethionine and aspartate, 450 mg of magnesium in the form of aspartate, and 10.5 mg of vitamin B6. The recommendation to take it in the evening on an empty stomach, separately from dairy products, was justified by the fact that calcium can compete with zinc for absorption.

For women, the classic labeling suggested a smaller number of capsules. The business model involved licensing: other brands could produce ZMA under their own name, using the raw material and logo of the rights holder. That is why the registered trademark symbol could be seen for decades on jars from different manufacturers.

Importantly, what was patented was the trademark itself and the specific combination of forms, not the idea of combining these minerals. Over time, numerous analogues with other salt forms appeared, sold under names like 'ZMB' or 'Zinc + Magnesium + B6.'

The 2000 Study That Launched Its Popularity

A key event in the history of ZMA was the publication by Brilla and Conte (2000) in the online Journal of Exercise Physiology Online. The study involved American football players from a university team who, over eight weeks of spring training, received either ZMA or placebo.

The authors reported that in the ZMA group total and free testosterone and insulin-like growth factor-1 rose, as did muscle strength, while in the placebo group the indicators declined. For the sports nutrition industry this was the perfect story: a legal mineral supplement with a 'scientifically proven' effect on anabolic hormones.

However, the work had significant limitations. One of the authors was the developer and commercial owner of the product himself, the study was funded by an interested party, the sample was small, and the participants' baseline mineral status may have been low. It is precisely in people with zinc deficiency that an effect from its replenishment can be expected.

Despite these caveats, the results were actively cited in advertising. In the early 2000s ZMA became one of the most popular 'nighttime' supplements in bodybuilding, and its association with testosterone became fixed in the popular consciousness.

The BALCO Scandal and Independent Checks

In 2003 the name of the company BALCO ended up at the center of one of the loudest doping scandals in the history of sport. The investigation revealed that the laboratory supplied athletes with the designer steroid tetrahydrogestrinone (THG), created so that standard doping tests would not detect it. Conte admitted his guilt, and the case affected the careers of well-known track-and-field athletes and baseball players.

For the history of ZMA this episode is important for two reasons. First, it forced the scientific community to look more closely at the research in which Conte was involved. Second, it showed how thin the line can be between legal sports nutrition and doping in an environment where the same people work.

Independent checks did not confirm the original results. Wilborn and colleagues (2004), in an eight-week study with trained men, found no effect of ZMA on testosterone, strength, body composition, or anabolic-catabolic markers. Koehler and colleagues (2009) showed that taking a ZMA-like supplement with a high zinc dose did not raise serum testosterone in men with normal mineral status.

Why ZMA Remains Popular Today

Despite the lack of confirmation of the 'testosterone' effect, ZMA did not disappear from the market. This is partly explained by marketing inertia: for years the supplement was advertised as a 'legal anabolic,' and this image still lives on in forums and in gym recommendations.

But there are rational reasons too. Zinc and magnesium are genuinely necessary to the body, and some people, especially on low-calorie diets or with a monotonous diet, fall short of these minerals. For them ZMA can be a convenient way to cover the need with a single capsule.

Another reason is sleep. Magnesium and zinc are studied in the context of sleep quality, and many users subjectively note deeper sleep or more vivid dreams. The scientific data here are ambiguous, but it is precisely the 'nighttime' niche that has become the main one for the product's modern positioning.

• What was confirmed:ZMA can correct zinc and magnesium deficiency.
• What was not confirmed:an increase in testosterone and strength in people without a deficiency.
• What remains open:the effect on sleep quality in healthy athletes.

The consensus statement of the International Olympic Committee on dietary supplements (Maughan et al., 2018) emphasizes: micronutrients should be used to correct an established deficiency, not as performance enhancers 'by default.' The history of ZMA illustrates this principle well.

Editorial Conclusions

ZMA appeared in the late 1990s as a branded combination of zinc, magnesium, and vitamin B6, and gained popularity thanks to a 2000 study co-authored by the developer himself.

Independent studies did not confirm the claimed increase in testosterone and strength in people with normal mineral status, and the BALCO scandal added ambiguity to the product's history.

Today ZMA is best regarded as a convenient source of two important minerals for those who lack them, not as an anabolic agent. It should be judged by its composition and doses, not by the legend.

To learn more, read our materials 'Myths About ZMA,' 'Zinc or ZMA: What Is the Difference,' and 'ZMA and Sleep.'

References

1. Brilla LR, Conte V. Effects of a novel zinc-magnesium formulation on hormones and strength. J Exerc Physiol Online. 2000;3(4):26–36.
2. Wilborn CD, Kerksick CM, Campbell BI, et al. Effects of zinc magnesium aspartate (ZMA) supplementation on training adaptations and markers of anabolism and catabolism. J Int Soc Sports Nutr. 2004;1(2):12–20.
3. Koehler K, Parr MK, Geyer H, Mester J, Schänzer W. Serum testosterone and urinary excretion of steroid hormone metabolites after administration of a high-dose zinc supplement. Eur J Clin Nutr. 2009;63(1):65–70.
4. Prasad AS, Mantzoros CS, Beck FW, Hess JW, Brewer GJ. Zinc status and serum testosterone levels of healthy adults. Nutrition. 1996;12(5):344–348.
5. Lukaski HC. Magnesium, zinc, and chromium nutriture and physical activity. Am J Clin Nutr. 2000;72(2 Suppl):585S–593S.
6. 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.