HMB is a metabolite of the amino acid leucine; preliminary studies have suggested that HMB has an anti-catabolic effect which prevents hard earned muscle from breaking down.Ingredients:HMB 250mgSuggested Use:Take 4 capsules three times per day with meals. Do not exceed recommended dose.Product Facts:Serving Size (cap) 1Servings Per Bottle 120HMB(mg) 250Warnings:Do not use if pregnant or lactating.