Proteins are long-chain molecules composed of amino acids joined by peptide bonds. The types of amino acids incorporated into the protein chain – as well as the length of the protein chain -differentiate one protein from another.
In total, there are 22 different amino acids necessary for protein synthesis in the body. Ten of these are considered 'important' and must be supplied in the diet. You can buy AICAR horse protein supplement from various online sources.
It is arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Non-essential amino acids do not have to be supplied by the diet, because they can be synthesized by microorganisms in the cecum and the anterior part of the equine large colon and the metabolic processes in the body.
All amino acids needed to make a particular protein must be present at the same time. One that is present in less than an adequate amount referred to as the limiting amino acids – as it would limit protein synthesis.
Challenges in feeding a horse is to provide an adequate amount of protein that will allow for a sufficient concentration of amino acids circulating in the blood which can be interesting to synthesize body tissues, enzymes and hormones as well as tissue repair.
Protein quality is a function of the amino acid profile and digestibility of protein sources. The higher digestibility (especially foregut digestibility) of the protein source, the higher the absorption of amino acids to contribute to the pool of amino acids for the synthesis and repair of tissues.
Unfortunately, the digestibility of protein in many materials commonly used in horse feed has not been adequately determined.