Annatto isn't currently classified as a tree nut, so food manufacturers are not required to put a nut warning label on foods that contain annatto. They are, however, required to list annatto in the ingredient list.

Is annatto safe for peanut allergy?

It gives food products their yellow or orange color. People with peanut allergies have reported having reactions to annatto, so there may be some cross-reactivity involved. Annatto is often found in Mexican and Latin American food. Reactions to this food coloring are usually mild.

Can you be allergic to annatto?

In general, annatto appears to be safe for most people ( 25 ). Though it's uncommon, some people may experience an allergic reaction to it, especially if they have known allergies to plants in the Bixaceae family ( 25 ). Symptoms include itchiness, swelling, low blood pressure, hives, and stomach pain ( 26 ).