Tannic Acid
Tannic acid is permitted as a food additive (flavor adjuvant) under FDA 21 CFR 184.1097 (GRAS) at use levels up to defined limits. Excessive intake can interfere with iron absorption and is associated with GI irritation; high dietary tannin levels have been studied for hepatotoxicity in animals.
What it is
Polyphenolic compound (a specific form of tannin) extracted from plants such as oak galls, sumac, or tara.
Clarifying agent in beverages (wine, beer); flavor adjuvant; color modifier.
Why it's flagged
- Can inhibit non-heme iron absorption at high intake
What regulators actually say
"Section 184.1097 - Tannic acid affirms tannic acid as GRAS for use in foods at specified levels."
Regulatory status
United States — FDA
Affirmed GRAS as flavor adjuvant under 21 CFR 184.1097.
European Union — EFSA
Authorized as food additive (tannins, food grade) in EU.
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