Free Form Amino Acids

Free form amino acids are singular molecules and are not bound to any other amino acid. These require no digestion and are "injected" directly into the blood supply via the small intestines. BCAAs are free form.

Although you get amino acids from food and shakes, those are peptide bond and are not free form, which means they're absorbed differently and more slowly.

Taking EAA, BCAA, Glutamine, etc. in a free form on a close to empty stomach pre/during/post workout will increase protein synthesis and shift metabolism so that you do not use muscle or aminos from stored amino acid pools, use fat for fuel instead of glycogen, providing for anti-catabolism, extended endurance, and blood sugar stabilization.