E160b (annatto, bixin, and norbixin)

E160b, or annatto, is a yellow-orange food colour obtained from the seeds of the Bixa orellana tree. Its main pigments are bixin and norbixin. Bixin is more suited to fat-based systems, while norbixin works better in water-based systems, so different annatto extracts are used for different foods. E160b may appear in cheeses, fats, desserts, sauces, snacks, bakery products, drinks and foods that need a warm yellow, orange or creamy shade.

Annatto is often described as a natural colour, and in one sense that is true: it comes from a plant. Plant origin, however, does not make an additive a whole food, a vitamin or proof of a healthy ingredient list. In cheese, sauce or dessert, E160b mainly provides colour. The nutritional value of the product depends on protein, fats, carbohydrates, minerals, raw material quality and how much of the product is eaten.

Bixin and norbixin

Bixin and norbixin are carotenoid pigments from annatto. They provide shades from yellow to orange-red and help manufacturers create a stable appearance. Annatto has a long history in cheese making: colour makes cheese look richer even when season, animal feed or milk fat naturally change the shade. In that context the colourant standardises appearance rather than creating a new flavour.

Different E160b extracts should not automatically be treated as identical. They differ in the ratio of bixin to norbixin, production method, solubility, carriers and impurities. EFSA therefore assessed annatto as a group of extracts rather than as one simple powder. For consumers, the short code on the label hides a technological form that cannot always be identified from the look of the product.

Safety and sensitivity

EFSA re-evaluated the safety of annatto extracts and considered bixin- and norbixin-containing forms separately. For most people, occasional intake of foods with E160b will not be the main risk factor. Annatto, however, is one of the colourants for which sensitive individuals sometimes report skin reactions, itching, abdominal discomfort, headache or poorer wellbeing after specific products.

Such reactions do not mean that annatto is harmful to everyone. Real products may contain acids, preservatives, milk protein, spices, sweeteners and other additives, so the trigger has to be identified carefully. If reactions repeatedly follow annatto-containing foods, it is reasonable to remove them for a period, keep a food diary and observe the connection. With clear allergic reactions, self-experimentation is not a good plan.

Low-carbohydrate relevance

E160b itself is not sugar or starch. In a low-carbohydrate diet it is usually relevant not because of carbohydrates, but because it is part of a manufactured food. Cheese coloured with annatto may fit LCHF well if it is real cheese without starch fillers or sweet additions. A sweet dessert, drink, sauce or bakery product with the same colourant is a different matter because sugar, flour, syrups or starches create the carbohydrate load.

A warm orange colour often makes a product look creamier, cheesier, fruitier or richer. Marketing can use this effect to make a simple mixture look more nourishing. It is therefore useful to look not only at E160b, but also at the base of the product: whether it provides protein, natural fat, recognisable ingredients and satiety, or whether it is a sweet imitation with attractive colour.

How to read the label

On labels, E160b may appear as annatto, bixin, norbixin or annatto extract. If the product is cheese-like, check for starch, poor-quality vegetable oils, sugar or stabilisers that change its nutritional role. If the product is a dessert, carbohydrate per serving and the source of sweetness matter most. Annatto itself does not make an unsuitable product suitable.

The practical conclusion is calm: E160b can be an acceptable technological detail when the product is otherwise simple and well tolerated. It should not become an argument that natural means beneficial. Real value comes not from orange colour, but from whole foods, adequate protein, quality fats, minerals and lasting satiety.