Do Beta-Alanine Supplements Build Muscle?

Beta-alanine is an amino acid the body can make, and it also comes from foods. Its main role is helping produce carnosine, a molecule stored in muscle tissue. Carnosine is linked with muscular strength and less fatigue, which helps explain why beta-alanine is popular in pre-workout products and among people training hard.

Research suggests supplementation may support endurance, power, muscle torque during dynamic movement, and performance in intense, short efforts such as lifting weights or sprinting. The potential effect may be greater in fast-twitch muscle fibers. Changes in carnosine levels and muscle strength may appear after four weeks. Research involving soldiers with regular high-intensity training also found higher carnosine levels in the brain, along with better muscular performance and mental resilience.

Beta-alanine is not the same as creatine, although studies often examine them together and suggest they may work better in combination than either alone. Following recommended doses is generally considered safe, while one large dose can cause paresthesia, or skin tingling. Questions remain about possible effects on taurine levels. Most people can obtain beta-alanine through animal foods, especially beef, chicken, fish, mackerel, tuna, and salmon, with smaller amounts in dairy and eggs. Supplements may be relevant for vegan or vegetarian athletes who have less beta-alanine in their usual diet, or when a doctor recommends them.