Red Lake 40

Red Lake 40 is a synthetic color additive. It is the aluminum lake of FD&C Red No. 40, meaning the water-soluble Red 40 dye is precipitated onto an inert base, usually aluminum hydroxide, to create a water-insoluble pigment.

It is used to add a red color to foods, especially those that are fat-based, have low moisture, or where color bleeding is undesirable. Common applications include candies, chocolates, seasoning mixes, salts, marinades, and tenderizers.

The FDA approves Red Lake 40 as a color additive for use in food. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, which includes Red 40 and its lakes. Concerns have been raised about synthetic food dyes, including Red 40, and their potential link to hyperactivity in some children. However, the FDA states that current scientific evidence does not establish a causal link for the general population, though some sensitive individuals may react. JECFA has evaluated Red 40 and set an acceptable daily intake.