Magnesium Citrate
Also known as: E345
Magnesium citrate is a well-tolerated form of magnesium with high bioavailability; commonly used as a mineral supplement and osmotic laxative at higher doses. EFSA and FDA recognize as safe.
What it is
Magnesium citrate (E345) is a magnesium salt of citric acid used as an acidity regulator and dietary supplement.
Acidity regulator, mineral fortification.
Why it's flagged
- laxative effect at high doses
What regulators actually say
"Magnesium citrate... is generally recognized as safe when used in accordance with good manufacturing practice."
"The Tolerable Upper Intake Level (UL) for magnesium from dietary supplements and medications is 350 mg for adults."
Regulatory status
United States — FDA
GRAS as nutrient supplement (21 CFR 184.1449); permitted as additive
European Union — EFSA
Authorized as E345 acidity regulator and as nutrient source
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