JYM Supplement Science - JYM ZMA 90 Capsules Go to amazon.com Related posts Which is the best zma optimum nutrition? FeatureThe True Strength Of ZmaZma Is A Potent Combination Of Zinc, Magnesium, And Vitamin B6. DescriptionbThe True Strength Of ZMAbbr ZMA is a potent combination of Zinc, Magnesium, and Vitamin B6.