Is Annatto (E160b) Vegan?

In the European Union, annatto appears on ingredient lists as E160b or by name, and regulatory listings distinguish between the bixin and norbixin forms. In the United States, it is classified among color additives exempt from certification and is typically declared as "annatto," "annatto extract," or "annatto (color)."

Other names can signal its presence. "Bixin" and "norbixin" refer to the two pigment forms. On Latin American products, "achiote" or "achiote paste" indicates annatto, often combined with spices. Filipino products may list "atsuete," and French Caribbean products sometimes use "roucou." All of these refer to the same plant-derived colorant.

Because annatto is a natural color, some products describe it in marketing terms such as "colored with natural annatto" rather than listing an E-number. Whatever the phrasing, the ingredient itself is always vegan. The relevant label question for vegans is not the annatto but the food around it — the cheese, butter, or smoked fish it colors is frequently animal-derived.

Cheese made from cow's milk is naturally white to pale yellow, with the depth of color varying by season and diet. Historically, milk from cows grazing on fresh summer pasture contained more carotene and produced a yellower cheese that was associated with higher quality. Cheesemakers began adding annatto to reproduce that color year-round, and the practice became standard for several traditional styles.

Red Leicester and Double Gloucester in England, Mimolette in France, and much of the cheddar sold in the United States owe their orange color to annatto rather than to the milk itself. The same logic applies to butter and margarine, where annatto helps deliver a consistent yellow regardless of season.

For vegans, this creates a recurring point of confusion: annatto is one of the few ingredients in a conventional cheese that is reliably plant-based. Seeing E160b on a cheese label says nothing about the product being vegan — the milk, cultures, and often the rennet remain animal-derived. Vegan cheese producers also use annatto to achieve cheddar-style coloring.

Outside industrial food coloring, annatto is a cooking ingredient in its own right. In Mexican and Central American cuisine, ground achiote seeds are blended with spices and sour citrus into achiote paste, the base of Yucatecan dishes such as cochinita pibil. In Puerto Rican and other Caribbean cooking, seeds are steeped in hot oil to make an orange-tinted cooking fat, and achiote is a common component of sazón seasoning blends. Filipino cuisine uses the seeds, known as atsuete, to color stews and sauces.

At these culinary concentrations, annatto contributes a mild flavor often described as earthy, peppery, or slightly nutty. At the much lower levels used as a commercial colorant, it is essentially flavorless, which is part of why it is so widely used.

The seeds and pastes sold for home cooking are plain plant products, though commercial achiote pastes should still be checked for added ingredients. The plain seeds, powder, and oil preparations are vegan by default.