Ph D ZMA® is produced using the patented ZMA® formula to support muscle & strength gains. shown to support healthy testosterone levels & aid in efficient energy metabolism, ZMA® is an all-natural & extremely popular sports nutrition aid to be used before going to sleep to maximize effects. Formulated with Vitamin B6 to help maximize Zinc & Magnesium absorption. ZMA® is a registered trademark of SNAC systems, Inc. All natural, Patented ZMA formula Formulated with Vitamin B6 Helps reduce tiredness & fatigue Supports healthy testosterone levels Synergistic combination of Zinc & Magnesium to help promote recovery from exercise