N,N-Dimethylglycine (DMG), a derivative of the amino acid glycine with the chemical formula C₄H₉NO₂, is a specialty chemical compound used as a dietary supplement. It supports immune function and improves exercise performance by acting as an antioxidant, helping to reduce oxidative stress in the body. It is commonly taken to support cardiovascular health and enhance oxygen utilization during physical activity. It is also investigated for its role in metabolic processes, including energy production and detoxification pathways. Some use it to support cognitive function, reduce fatigue, and alleviate symptoms like anxiety or mood imbalances. Additionally, it is applied in veterinary medicine, particularly for performance animals like racehorses, to improve stamina and recovery.