HealthMap

Carnosine and Beta-Alanine Status in Vegans

• Primary Finding: Carnosine levels in skeletal muscle are significantly lower in individuals following a vegan or strict vegetarian diet compared to omnivores.
• Biochemical Pathway: Carnosine is a dipeptide synthesized in the body from the amino acids beta-alanine and L-histidine.
• Dietary Limitation: Because carnosine is found exclusively in animal tissue (meat, poultry, and fish), vegans consume zero dietary carnosine. Furthermore, dietary intake of its rate-limiting precursor, beta-alanine, is also reduced in plant-based diets.
• Muscle Saturation: Muscle tissue relies heavily on the availability of circulating beta-alanine to maintain optimal carnosine stores. Without adequate precursor supply, muscle carnosine concentrations drop over time.
• Functional Impact: Lower muscle carnosine can reduce the buffering capacity against hydrogen ions during high-intensity, anaerobic exercise, potentially affecting muscle endurance and performance.