WHAT ARE ESSENTIAL AMINO ACIDS? Essential Amino Acid, often referred to in research as EAA, are termed ‘essential’ as they must be obtained via the diet – they can’t be synthesised by the body. The nine Essential Amino Acids are: Leucine, Isoleucine, Valine, Lysine, Phenylalanine, Tryptophan, Threonine, Methionine & Histidine. BULK POWDERS™ Essential Amino Acids are an exclusive blend, with a high Leucine content of 5g per 15g serving. Essential Amino Acids can be obtained