Ferrous Gluconate To Stabilize Color
Ferrous gluconate is permitted as a color fixative and dietary iron source. FDA and EFSA both authorize it.
What it is
Iron(II) gluconate, the iron salt of gluconic acid, used as a color stabilizer in olives and as a nutrient/iron source.
Color fixative (especially in ripe olives) and source of iron for fortification.
Why it's flagged
- iron overload at excessive intake
- pediatric overdose risk in supplement form
What regulators actually say
"Section 73.160 - Ferrous gluconate authorizes use to color ripe olives at levels not to exceed 0.15 percent."
"EFSA re-evaluation of ferrous lactate (E 585) and ferrous gluconate (E 579) as food additives."
Regulatory status
United States — FDA
Permitted as color additive in olives under 21 CFR 73.160; affirmed GRAS as nutrient under 21 CFR 184.1308.
European Union — EFSA
Authorized as additive E579 (color stabilizer) and as iron source for fortification under EU rules.
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