It looks like ZMA costs considerably more than its components separately.
Yes it is a little more. There is a patent on it and all still have to pay royalties, I believe.
I also didn’t find any particular rational for ZMA ratios and don’t understand what makes it special.
It is based on studies primarily by the company that developed it.
The only independent study I found that ZMA has no effect on strength, hormone levels, or anaerobic capacity.
Some yes and some no. Did you look at the individual components also? Zinc being the most important?
Effect of fatiguing bicycle exercise on thyroid hormone and testosterone levels in sedentary males supplemented with oral zinc.Kilic M.
School of Physical Education and Sports, Selcuk University, Konya, Turkey. email@example.com
OBJECTIVE: The aim of this study was to determine how exercise affects thyroid hormones and testosterone levels in sedentary men receiving oral zinc for 4 weeks. METHODS: The study included 10 volunteers (mean age, 19.47+/-1.7 years) who did not exercise.
All subjects received supplements of oral zinc sulfate (3 mg/kg/day) for 4 weeks and their normal diets. The thyroid hormone and testosterone levels of all subjects were determined at rest and after bicycle exercise before and after zinc supplementation. RESULTS: TT3, TT4, FT3, and total and free testosterone levels decreased after exercise compared to resting levels before supplementation (p<0.01).
Both the resting and fatigue hormone values were higher after 4 weeks of supplementation than the resting and fatigue values before supplementation (p<0.05). CONCLUSION: The results indicate that exercise decreases thyroid hormones and testosterone in sedentary men; however, zinc supplementation prevents this decrease. Administration of a physiologic dose of zinc can be beneficial to performance.
So what is special about ZMA as compared to Zinc + Magnesium for deficiency?[/quote]
Maybe nothing if you use a quality form of Zinc and Magnesium. ZMA also has B6.
I believe Zinc is the most important, but more people are deficient in Magnesium than Zinc. If you take Zinc you may want to make sure you have enough Copper in your diet.