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E921✅ Safe

L-cystine

Category

Glazing Agents, Gases & Sweeteners

Function

improving agent

EU: ApprovedUS: Not Evaluated

Safe. Insufficient data to determine safety.

Official Sources

EU Register — EU Register entry for E921(2026-07-01, tier 1)
EFSA — EFSA OpenFood Tox database(2026-07-01, tier 1)
FDA — FDA Substances Added to Food (search: E921)(2026-07-01, tier 1)
Codex Alimentarius — Codex GSFA entry for E921(2026-07-01, tier 2)

Last checked: 2026-07-13