These used to be popular the same time the weight gainers were. Multi-spectrum amino acids (amino acid tablets with many different amino acids in them) are nothing more than crude protein powder compressed into tablets. So it’s like taking protein in tablet form.
There are some free form amino acid supplements, but the science here doesn’t cut it. In fact, there was no science showing that supplementing with them provided any benefit in athletic performance.
Multi-spectrum free form amino acids may pose an absorption problem due to the varying molecular weights of the individual amino acids. This can cause different absorption rates and characteristics among the different individual amino acids.
It is not recommended taking multi-spectrum amino acid supplements. Singular amino acids, like L-Glutamine, are a different story especially when taken in doses that impart a definite physiological effect.
