Magnesium Ascorbate
Magnesium ascorbate is a recognized vitamin C source; both ascorbic acid and magnesium are required nutrients with established Tolerable Upper Intake Levels (2,000 mg/day for vitamin C and 350 mg/day for supplemental magnesium in adults per NIH ODS). Excess magnesium from supplements can cause diarrhea.
What it is
Magnesium salt of ascorbic acid; a buffered (non-acidic) form of vitamin C that also contributes magnesium.
Vitamin C fortificant and antioxidant.
Why it's flagged
- high-dose magnesium can cause diarrhea
- vitamin C UL 2,000 mg/day adults
What regulators actually say
"The Tolerable Upper Intake Level (UL) for vitamin C is 2,000 mg/day for adults."
"The UL for supplemental magnesium is 350 mg/day for adults; higher doses can cause diarrhea."
Regulatory status
United States — FDA
Vitamin C/ascorbates GRAS as fortificants; magnesium salts GRAS for nutritional use.
European Union — EFSA
Authorized vitamin C source under EU vitamin/mineral regulations.
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