I know two methods for a production of amino acid, e.g. glycine: synthesizing and fermentation. Is there no problems for foods or feedstuffs? Additional problem is that which technique is chipper for a production of glycine (99% purity)?
Glycine is a non-essential aminoacid for humans. In poultry can be synthetized by the birds, but depending on metabolic need, such synthesis might not be enough. Yet, poultry and swine can interconvert glycine and serine; that is, they can get one aminoacid fron the other. Thus, it will be ideal to establish what would be the purposes of such dietary supplementation. However, there are other reported functions for glycine, including acting as a neurotransmitter.
With aminoacids other than glycine, stereochemistry plays a very important role in the ability of the body to utilize them, with the levorotatory forms being utilized more efficiently than the dextrorotatory isomers. This is an important factor to consider when choosing their method of production.