Manganese Gluconate
Manganese gluconate is GRAS as a nutrient supplement and is authorized in the EU as a manganese source in food supplements and foods for specific groups. Manganese is an essential trace element with an IOM AI of 1.8-2.3 mg/day for adults; the IOM Tolerable Upper Intake Level is 11 mg/day.
What it is
The manganese(II) salt of gluconic acid — a soluble organic manganese compound used as a dietary mineral source.
Manganese fortificant in foods and supplements.
Why it's flagged
- potential neurological effects at very high chronic intakes
What regulators actually say
"Manganese gluconate. The ingredient is generally recognized as safe when used in accordance with good manufacturing practice."
"The Food and Nutrition Board (FNB) established adequate intakes (AIs) for manganese...The Tolerable Upper Intake Level (UL) for manganese is 11 mg/day for adults."
Regulatory status
United States — FDA
GRAS as a nutrient supplement under 21 CFR 182.5446.
European Union — EFSA
Authorized manganese source for food supplements (Annex II of Directive 2002/46/EC) and foods for specific groups (Reg. (EU) 609/2013 and Reg. (EU) 2017/1203).
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