In connection with fitness and bodybuilding, one does not get around the amino acids. There are different products and compositions that are usually not making sense, unless you know what is being refered to. The best known examples are BCAA (Branched Chain Amino Acids) and EAA (Essential Amino Acids).
Branched Chain Amino Acids contain 3 important amino acids for affecting mTOR (protein synthesis) these are L-Leucine, L-Valine and L-Isoleucine. EAA, Essential amino acids - contains 9 Essential Amino Acids. including the beforementioned three, plus L-Phenylanine, L-Threonine, L-Lysine, L-Histidine & L-Tryptophan. Together, the 9 essential amino acids represent the complete chain needed to build muscle tissue.
As often there are for and against all products. the sport is generally characterized by marketing, which is made for driving sales, by affecting the end consumer. At Only Approved Supplements, our recommendations is typically that you should use Essential Amino Acids, ie EAA. BCAA is in many cases like starting a car with little to no gasoline on the tank. You may be able to start it and drive a few meters before stopping. An Essential Amino Acid is able to both start the engine (protein synthesis) but also to drive the car (build muscle tissue).
BCAA, however, is a really fine product if used before a meal. Here you will initiate protein synthesis, which is then maintained at the subsequent meal. For both products, it should be added that they cannot be expected to have a positive effect without consuming sufficient amounts of food in relation to your goal.