ZMA is a dietary supplement, containing the minerals zinc and magnesium and vitamin B6. The combination of these two minerals and vitamin B6, received in the appropriate quantity, increases the level of the male sex hormone testosterone and an insulin-like growth factor (IGF-1). The higher testosterone levels increase significantly muscle mass, power and endurance. In a combination of the increased insulin-like growth factor, the testosterone dramatically reduces the time for recovery of the organism after heavy workouts. Intensive workouts can lead to zinc and magnesium deficiency in the organism which can lead to tiredness, difficult recovery and can hinder muscle growth. Zinc, magnesium and vitamin B6 intake through supplementation is recommended during all kinds of workout programs.