Amino Acids describe the compounds that Protein breaks down into. There are approximately 20 amino acids, each partaking in a different role in the body. Amino Acids are crucial for muscle recovery, growth and repair. They are also necessary for a variety of other internal processes, as well as being responsible for maintaining hair, skin and nails. 9 of these amino acids are considered essential, whereby they must be obtained from an external source (ie Food or Supplements) as the body cannot create them on its own. Amino Acids can be sourced in animal derived proteins such as meat and dairy, less so in plant-based foods or in supplement form. BCAA's (Branch Chain Amino Acids) describe three key amino acids (Leucine, Iso-Leucine, Valine) which play an integral in muscle fuel and avoiding muscle breakdown. Hence, BCAA products are commonly used during training sessions, whereas essential amino acids can be used at any time of the day. Some products combine both and can therefore be used both during training or throughout the day between meals.