One of the most popular supplements around, providing a massive 810mg dose of zinc and magnesium with additional vitamin B6. ZMA® is a patent protected formula of zinc, magnesium and B6. Our ZMA® Capsules are manufactured through a proprietary process using highly bioavailable forms of zinc and magnesium, including zinc L-monomethionine. Zinc & Magnesium is a popular product to help someone sleep better. Get a better night's sleep with ZMA from Bulk.