Studies have found that nitrogen retention is poorest when using amino acid supplements instead of food. Essential amino acids are more effective when consumed in proper proportions to one another. Eating animal product foods, or a variety of vegetables which contain all of the essential amino acids, is recommended. Excess amino acids and proteins can have detrimental effects on the human body. Excessive protein intake can damage the kidneys, cause dehydration and electrolyte losses, and increase calcium losses.
Amino acid supplements, no matter what form they take, are quite expensive.
Depending on the amino acid, capsules or powders can run anywhere between four and sixty dollars. When we multiply these costs by all of the different amino acids that are recommended by companies, it is not inconceivable for one to spend hundreds, if not thousands, of dollars on items whose validity is not even scientifically solidified. There are mistruths, perhaps due to pure ignorance, regarding the contents of products and their benefits. In theory, the greater the amount of BCAA's in the bloodstream, the lower the fatigue of an individual. Before going out and spending hundreds of dollars on such supplements, be aware that they may have no effect.