United Pharma USA – Pure HMB 4000 is a dietary supplement formulated to support muscle health and performance. Each serving provides 4,000 mg of β-Hydroxy β-Methylbutyrate (HMB), a metabolite of the essential amino acid leucine. HMB is known for its role in promoting muscle protein synthesis and reducing muscle protein breakdown, making it beneficial for individuals engaged in resistance training or seeking to maintain muscle mass during periods of inactivity.