Glycine is a protein amino acid. Due to the body's ability to create glycine from serine, it is considered a nonessential amino acid. The human diet typically contains about 2 grams of glycine daily. The best sources of glycine and protein rich foods are meat, fish, diary, and legumes.
Glycine is involved in many body functions. Glycine is responsible for the synthesis of many other proteins as well as an important neurotransmitter. Glycine is used for support of the brain, liver, and kidney. There have been some indications of anti-inflammatory and antioxidant properties.
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Cautions Orally, glycine is very well tolerated. Rare reports of nausea, vomiting, upper gastrointestinal (GI) tract discomfort and mild sedation have been made.