Scientists study them, for instance, observing their composition and unveiling their chemical sequence (the chain of amino acids a protein is composed of.) (sciencedaily.com)
To make sure that you get plenty amino acids the protein supplement you take has to have the right amino acids be readily usable by the body (and not just passed through). (build-muscle-and-burn-fat.com)
Organic, vegan protein powders, like this one by Ora Organic, contain complete amino acid protein profiles and give a clean protein source of twenty different super food proteins. (ora.organic)