Zinc Chloride
Permitted nutrient source for zinc fortification in foods and supplements. Excess zinc intake (>40 mg/day adults UL) can cause nausea, copper deficiency, and impaired immune function.
What it is
Inorganic salt ZnCl2 — a soluble zinc compound used industrially and as a nutrient source.
Used as a source of zinc in fortified foods and dietary supplements.
Why it's flagged
- GI irritation at high doses
- copper deficiency from chronic excess
- UL 40 mg/day adults
What regulators actually say
"The tolerable upper intake level (UL) for zinc is 40 mg/day for adults. Toxicity from chronic excess zinc intake includes copper deficiency, altered iron function, and reduced immune function."
"Annex II — Vitamin formulations and mineral substances which may be added to foods, including zinc chloride."
Regulatory status
United States — FDA
GRAS as a nutrient/dietary supplement zinc source; permitted in infant formula (21 CFR 107).
European Union — EFSA
Authorized zinc source for foods (Reg. 1925/2006 Annex II) and supplements (Directive 2002/46/EC Annex II).
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