Your body can naturally produce HMB, but only when the essential, branched chain amino acid, leucine is present. When leucine is available in the body, a part of it tends to be metabolised into HMB. Although, HMB can be produced in the body, leucine can’t – this means you have to source leucine in your diet through foods such as meat, fish and eggs. The higher your leucine levels are, the more HMB is produced. And, of course, the higher your protein levels are, the more energy available to burn during exercise and support muscle development and growth.