Betaine nitrate pairs trimethylglycine with dietary nitrate. Your body converts the nitrate into nitric oxide, a molecule that relaxes blood vessels and improves blood flow. The betaine portion supports cellular hydration and helps process homocysteine.
Athletes take it as a pre-workout powder, mixing a dose with water 30 to 60 minutes before training. The goal is sharper endurance, better strength, and faster recovery. Some people use it for day-to-day cardiovascular support, though the strongest evidence points to exercise benefits.
Do not use this supplement if you take prescription nitrates such as nitroglycerin or PDE5 inhibitors like sildenafil or tadalafil. The combination can drop blood pressure dangerously low. Get a doctor's clearance if you have low blood pressure, take antihypertensive medications, or are pregnant or nursing.