Here's a little tidbit to think about.
Amino acids taken as supplements are not necessarily the answer to either getting the essential amino acids or to obtaining the appropriate amount of protein. Amino acids consumed as supplements may respond differently in the body than food sources of protein. Specifically, the supplemental amino acids may not be absorbed as efficiently as the amino acids from food sources. Thus, most of the amino acids taken as supplements are excreted. Even if the amino acids are absorbed, excess amino acid intake is not converted to muscle mass, but rather to fat or glucose.
Excessive protein intake can be detrimental to the normal physiological functioning of the body for several reasons. First, as just stated, excess protein intake generally increases body fat because: 1) high-protein foods often contain a large quantity of fat, and 2) excess protein can not be stored as such; therefore, it must be converted to either glucose or most likely to fat. Excessive protein intake can also lead to dehydration due to the excess amount of nitrogen and urine that are excreted. To obtain the appropriate nitrogen balance, the kidneys and liver have to work very hard and therefore may be damaged. With excessive protein intake, calcium loss in the urine may also be increased.