Beta-alanine works by elevating levels of carnosine in the body.
When beta-alanine is ingested, it combines with another amino acid called L-histidine, forming carnosine. Carnosine acts as an intracellular proton buffer — it protects against drops in pH (increases in acidity). Carnosine is stored in cells (i.e., brain and skeletal muscle tissue), and in response to increasing levels of acidosis, such as during intense exercise, carnosine buffers intracellular acidity by binding to hydrogen ions (H+), allowing for a longer duration of exercise at a higher intensity.
