It is the essential amino acid ratio recommended by the WHO Close to 1:1 ratio of glutamine and BCAA Sugar-free Gluten-free It refers to ready shakes mixed with water. The ratio of the different essential amino acids in the product follows the recommendation of the World Health Organization (WHO). (Protein and Amino Acid Requirements in Human Nutrition - Report from the Joint FAO/WHO/UNU Expert Consultation.) Essential amino acids, as the name implies, are indispensable for the human body since it either cannot produce them at all or it can produce them only in quantities that are insufficient. That is why it is particularly important to ensure their intake from external sources, preferably in optimal quantities and in the right proportions. As with all BioTechUSA products, EAA Zero was also developed to have the best composition. Therefore, EAA Zero contains all the essential amino acids in optimal proportion as set out by the World Health Organization. During the renewal of EAA Zero we didn’t only seek to get the proportions right, but we also aimed at creating a complex product. As a result, the product now contains all the essential amino acids and by adding glutamine we further increased the quantity of amino acids required for muscle building. EAA Zero provides a special amino acid combination that you can drink without guilt even if you are on a diet, because the product is sugar-free. Drink it in refreshing lemon and blue grape flavours before or even during an exhaustive workout session.