The acidity and alkalinity of food is determined by the nature of metabolites, so the final metabolite of meat is amino acid, which means that all meat is acidic. Among the meats with the same quality, chicken, fish and beef have high protein content and low fat content, which are good choices for bodybuilders, especially beef, which also contains animal hormones (secreted by animals themselves rather than artificially added), which is more conducive to muscle growth and recovery.