Also on labels as: Bixin, Norbixin, E160b, Annatto extract, CI Natural Orange 4
In one line
A natural orange-yellow food dye extracted from the seeds of the achiote tree, used to colour dairy and snack foods.
What is Annatto?
Annatto comes from the reddish seed coating of the achiote plant, native to tropical regions of the Americas. The seeds contain two main pigments — bixin, which is oil-soluble, and norbixin, which is water-soluble — giving manufacturers flexibility across different product types. It has been used as a food colourant and cooking spice for centuries.
What does it do in the product?
Annatto delivers a warm yellow-to-orange hue without synthetic dyes, making it popular in dairy products like cheddar, where consumers expect a consistent colour regardless of season or cow diet. Manufacturers choose it partly for its natural origin, which appeals to label-conscious shoppers. At culinary concentrations it contributes a faintly earthy, peppery undertone, though in most processed foods the quantity is too small to affect flavour noticeably.
Where you usually find it
Cheddar and processed cheeses
Butter and margarine
Snack chips and crackers
Breakfast cereals
Smoked sausages and deli meats
Flavoured popcorn
Is Annatto something to worry about?
For most people, annatto at the levels found in food presents no documented safety concern, and regulatory bodies in both the US and EU consider it acceptable for use in approved food categories. However, a meaningful subset of individuals reports allergic or intolerance reactions — including hives, digestive upset, and worsened irritable bowel symptoms — that are not always captured in standard allergy testing. People sensitive to aspirin or other salicylates appear at somewhat higher risk, though the evidence base on this link remains limited and inconclusive.
Who should pay attention
People with known annatto sensitivity or allergy
Those managing irritable bowel syndrome or other functional gut conditions
Individuals with salicylate intolerance
Parents of children with suspected food dye reactions
Anyone following a strict elimination diet to identify food triggers
How is it regulated?
In the United States, the FDA lists annatto extract as a colour additive exempt from certification, meaning it does not require batch-by-batch approval the way synthetic dyes do, but it must still meet identity and purity standards and be declared on the label. The European Union authorises it as E160b with specified acceptable daily intake guidance and restricts its use to particular food categories at defined maximum levels. Both jurisdictions require it to be named on ingredient lists, giving consumers a clear way to avoid it if needed.
How to spot it on a label
On US labels you will typically see 'annatto extract' or simply 'annatto' listed among the colourants, usually near the end of the ingredient list. In the EU the same substance may appear as 'E160b' or by its name, sometimes written as 'annatto (colour)'. If the label says 'colour' or 'natural colour' without specifying annatto, the physical packaging may carry more detail — always read the full label if you have a sensitivity.
What a cleaner swap looks like
If you react to annatto, look for cheeses, butters, or snacks that declare no added colour or that use turmeric or beta-carotene for any yellow tint — though note that turmeric can itself be an allergen for some people. White or pale versions of cheddar and similar cheeses are produced without any added colourant and are the most straightforward swap. InZoRAH can flag products that use alternative colourants so you can compare options quickly.
Questions people also ask about Annatto
Is annatto a natural or artificial ingredient?
Annatto is derived from the seed coating of the achiote plant, so it qualifies as a natural colour. It is not synthesised in a laboratory. However, 'natural' does not automatically mean risk-free — some people have genuine allergic or intolerance reactions to it, just as they might to any plant extract.
Why is annatto in cheese if it doesn't change the flavour?
Historically, a deeper orange colour in cheddar signalled higher fat content and richer milk. The tradition carried on even as production methods changed. Today annatto is added purely for appearance — to meet consumer expectations for a consistent, recognisable orange hue — because the colour of cow's milk varies naturally with the seasons.
Can annatto cause an allergic reaction?
Yes, though it is not among the top regulated allergens. Some people experience hives, digestive discomfort, or swelling after consuming annatto-containing foods. Standard allergy panels do not routinely test for it, so reactions are often undiagnosed for some time. If you suspect a sensitivity, an elimination approach guided by a healthcare professional is a reasonable first step.
Does annatto affect children differently than adults?
There is no strong evidence that children metabolise annatto differently. However, parents tracking suspected food reactions in children sometimes identify annatto as a trigger for skin or gut symptoms. Because children eat many annatto-coloured snacks and dairy products, it is worth checking labels if an elimination diet is underway.
Is annatto banned anywhere?
Annatto is not banned in any major market. Both the FDA and the European Food Safety Authority have evaluated it and allow its use under specific conditions. Some countries apply stricter limits on the categories or amounts permitted, but an outright prohibition is not currently in effect in the US, EU, UK, or most comparable jurisdictions.
What is the difference between bixin and norbixin in annatto?
Both are pigments extracted from the achiote seed coat, but they behave differently in food formulations. Bixin is oil-soluble and suits fat-based products like butter and cheese. Norbixin is water-soluble and works better in water-based or low-fat products. Manufacturers choose the form that disperses evenly in their specific product matrix.
Where this came from
FDA colour additive regulations (21 CFR Part 73) — Establishes annatto extract's status as a colour additive exempt from certification and outlines labelling requirements in the US.
EFSA re-evaluation of natural food colours including E160b — Provides the EU's scientific assessment of annatto's safety, acceptable daily intake guidance, and authorised food categories.
Open Food Facts ingredient database — Documents the frequency and context of annatto's use across commercially available food products worldwide.
Published case reports and clinical allergy literature on annatto hypersensitivity — Supports the documented pattern of allergic and intolerance reactions in sensitive individuals, while also reflecting the limited size of the evidence base.
Original write-up based on public records. Educational information, not medical advice — ingredient records change, so always read the physical label if you have an allergy.
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