Citric acid

Citric acid helps control acidity in drinks, sauces and other foods. Food-grade material can be produced by fermentation; its identity does not establish whether a particular product contains fermentation residues. JECFA assigned an acceptable daily intake described as not limited, based partly on normal metabolism and older toxicology studies. This is not a guarantee that every amount or acidic product is harmless.

Frequent contact with sufficiently acidic foods or drinks can wear tooth surfaces, and concentrated acid can irritate tissues; acidity, contact time and the whole formulation matter. Newer human evidence adds uncertainty: 2026 analyses from one French cohort associated estimated additive intake with hypertension and type 2 diabetes. These observational findings do not prove that citric acid caused either illness, and related mixture analyses are not independent replication. Four earlier case reports suggested inflammatory reactions without controlled challenges or measured contaminants.

A 2026 EFSA concern involved one specific animal-feed fermentation product, not a general finding about food-grade citric acid. Ingredient labels do not reveal the dose, final acidity or supplier needed to estimate an individual risk.

Research reviewed on October 22, 2026 · 12 sources