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Serine
Serine
Low concern
L-Serine is a normal dietary amino acid. As a nutritional supplement, it is permitted under FDA amino acid food additive regulation.
Found in
120 products
What it is
L-serine, a non-essential proteinogenic amino acid.
Nutrient; building block of proteins.
Why it's flagged
- GI upset at very high supplemental doses
What regulators actually say
"The food additive amino acids may be safely used to supplement food... L-Serine listed among permitted amino acids."
"Amino acids are nutrients used in the body to build proteins; L-serine is a non-essential amino acid synthesized in the body."
Regulatory status
United States — FDA
Permitted nutrient amino acid (21 CFR 172.320).
European Union — EFSA
Permitted amino acid for food fortification under EU regulations.
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