ZMST is Zinc, Magnesium, Selenium, and Taurine. The nutrients zinc, selenium and magnesium are termed “essential” as you cannot make them inside your body from other materials they must be supplied by the diet. Taurine is “conditionally essential” meaning during times of increased demand your diet may need to be supplemented to maintain adequate levels.
ZMST may be of benefit to help you maintain adequate intakes of magnesium, zinc, selenium, and taurine. Or if you want to take more during times of increased physical and mental exertion or stress.