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Glycine is a sweet tasting, non-essential amino acid that was first isolated in 1820 from gelatin and is also found in good quantity in silk fibroin. This nonessential nutrient can be manufactured from serine and threonine, so dietary intake is not essential.
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It is required to build protein in the body and synthesis of nucleic acids, the construction of RNA as well as DNA, bile acids and other amino acids in the body. It is further found to be useful in aiding the absorption of calcium in the body.
It helps in retarding degeneration of muscles since it helps to supply extra creatine in the body.
It is also found in fairly large amounts in the prostate fluid and may for this reason be important in prostate health.
The glycine amino acid is also used by the nervous system and its function as an inhibitory neurotransmitter makes it important to help prevent epileptic seizures and it is also used in the treatment of manic depression and hyperactivity.
Few people are glycine deficient, in part because the body makes its own supply of the non-essential amino acids, and because it is abundant in food sources.
The dosage listed is the Recommended Daily Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.
No clear toxicity has emerged from glycine studies, however individuals with kidney or liver disease should not consume high intakes of amino acids without consulting a health care professional.
In a study where men were given extra glycine over a period of time, it reduced the symptoms of prostatic hyperplasia.
If the amino acid serine is required in the body, it can be converted from glycine.
High protein food contains good amounts of glycine and is present in fish, meat, beans, and dairy products.
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