Trisodium citrate dissolves quickly in water and absorbs rapidly. This form of sodium citrate delivers sodium and citrate without the stomach upset that other buffering agents can cause.
During intense exercise, citrate buffers the hydrogen ions responsible for muscle burn. Raising blood pH delays fatigue and helps maintain power output across repeated efforts.
In the kidneys, the extra citrate makes urine more alkaline. A higher urine pH keeps uric acid and calcium oxalate dissolved, so they pass out of the body more easily.