Prime DMG contains 28,000 mg/serving dimethylglycine (DMG), an amino acid that has been shown to provide several benefits for horses. DMG is a natural substance found in small amounts in foods such as grains and beans. DMG has been shown to support the immune system, promote oxygen utilization, and improve stamina and endurance in horses. For more information, visit http://www.primeperformancenutrition.com/.