The name reveals the information that it is probably chain-like, and it is a chain-like structure composed of multiple amino acids, referred to as BCAA. three common amino acids in protein, namely leucine, valine and isoleucine are collectively called branched-chain amino acids. Why are they called branched-chain amino acids? It is because these three amino acids have branched carbon shelves, so they are not the previous guesses.
These amino acids promote anabolism (muscle growth) in two specific ways: they promote insulin release; and they promote growth hormone release. The most important of the branched-chain amino acids is leucine, the precursor of KIC and HMB. kIC and HMB build muscle and provide nutrients to the body. bcaa make up almost 1/3 of muscle protein. bcaa slow muscle fatigue, speed recovery, reduce the loss of other amino acids from muscle during exercise, and help the body absorb protein. A deficiency of one of the three will result in muscle loss. Unlike other amino acids, BCAAs are metabolized in the muscle, not in the liver.
It is commonly believed that BCAAs can enter the brain through the bloodstream and reduce the brain’s production of 5hydroxytryptamine, which can cause fatigue. Brain fatigue can be reduced by reducing the amount of 5hydroxytryptamine, and there is now a considerable amount of scientific research to support this theory. Generally to improve central fatigue through BCAA supplementation, a larger dose is required, but this brings with it a potential side effect of possibly causing an increase in blood ammonia levels. Ammonia is toxic to the brain, and an increase in blood ammonia also has the potential to impair muscle metabolism and cause muscle fatigue.
BCAAs are competitive with each other in their ability to be absorbed, so they must be supplemented simultaneously to ensure maximum absorption. Branched-chain amino acids are also consumed rapidly in muscles during training, and supplementation before or during exercise can improve exercise capacity and delay fatigue. Branched-chain amino acids taken immediately after exercise or with a meal after exercise can reduce cortisol and quickly restore muscle levels of branched-chain amino acids.
1. Amino acids
Amino acids are the basic structural units that make up proteins. There are 20 types of amino acids that occur naturally in proteins. Different numbers of amino acids are connected in order of peptide bonds to form peptides or polypeptides of different lengths, usually those with relative molecular mass below 1500 are called peptides and those above 1500 are called polypeptides. Polypeptide is a subunit of protein molecule, some protein molecules have only one polypeptide chain, some are composed of several polypeptide chains.
5-Hydroxytryptamine was first discovered from serum, also known as serotonin, widely existed in mammalian tissues, especially in the cerebral cortex and neurosynapses with high content, it is also an inhibitory neurotransmitter.