Roucou

What is Roucou?

Roucou is the orange-red seed coat of Bixa orellana, a small tropical tree. You may know it as annatto, bija or achiote. It is mainly a food colour, and in Caribbean homes it has also been used as a remedy tea.

The seeds carry a waxy red pigment. Cooks steep them in hot oil to colour rice, stews and fish. Dairies use the same pigment to turn cheese, butter and snack foods orange.

As a remedy, roucou was drunk as a tea said to "wash" the kidneys and liver. There are no good human trials of that use. Long use in Caribbean kitchens and sickrooms is not proof that it treats anything, and it is not proof that remedy-strength doses are safe.

The honest verdict: roucou is a well-accepted food colour with a thin medical evidence base. As a flavour and colour it is ordinary and low-risk. As a treatment for kidney or liver trouble, it is unproven.

How does Roucou work?

No one has shown that roucou cleans the kidneys or the liver. Those organs already filter your blood on their own. The "wash" idea is a folk model, not a measured effect.

The red pigments bixin and norbixin are carotenoids. In test tubes they soak up free radicals. Whether that does anything useful inside the body is not known.

In animal studies, annatto extracts have shifted blood sugar. Results went both ways, up in some studies and down in others. That is one reason to be careful if you take diabetes medicine.

Annatto seeds are also rich in tocotrienols, part of the vitamin E family. Small human trials of purified tocotrienol have looked at blood fats and blood sugar markers. Those capsules are not the same thing as a seed tea.

In laboratory tests, annatto extracts slow the growth of some bacteria and fungi. Whether that happens in a person who drinks the tea has not been shown.

What forms does Roucou come in?

Most roucou you will meet is food, not medicine.

Whole seeds, sold loose or in packets. Cooks steep them in hot oil or water to draw out the colour.

Annatto paste and achiote blocks, mixed with spices, salt and vinegar. These are cooking products.

Annatto or norbixin extract, added to cheese, butter, margarine and snacks. In Europe it is listed on labels as E160b.

Dried seed or leaf tea, the usual form in Caribbean home use.

Capsules of annatto tocotrienol, a purified vitamin E fraction. This is a modern supplement and is not the traditional tea.

Skin oils, soaps and sun products that use the pigment for colour.

Where it comes from:

Amerindian peoples of the Caribbean and the Amazon used roucou long before European contact. They painted the pigment on skin for ritual, for sun cover and to keep insects away. Early Spanish writers recorded the practice in the 1500s.

The plant spread with trade and became a kitchen staple across the islands. In Trinidad and Jamaica it was called annatto. In Cuba and the Dominican Republic it was known as bija or achiote.

In Caribbean home medicine, bija tea was taken as a kidney and liver wash. Healers also used it for fever, for burns and for insect bites. These were household practices, and they were not tested in the way a medicine is tested today.

What does Roucou help with?

• Kidney and liver "wash" teas: This is the main Caribbean remedy use. Healers in Cuba and the Dominican Republic gave bija tea to flush the kidneys and clear the liver. There are no human trials testing that claim. Do not use it in place of care for kidney or liver disease.
• Fever: Island households used roucou tea as a cooling drink during fevers. No trial has tested it for fever in people. A fever that is high or lasting needs a doctor, not a tea.
• Burns, rashes and insect bites: The pigment was smeared on skin for burns, bites and sun protection. In laboratory tests, annatto extracts slow some bacteria and fungi. Whether that helps a real wound heal is not established, and broken or burned skin needs proper care.
• Digestive upset: Annatto is a common seasoning and was thought to settle the stomach. Evidence in people is lacking. Any benefit may simply come from a warm drink.
• Blood sugar control (folk use): Some folk sources used roucou for diabetes. Animal studies show blood sugar moving both up and down with annatto extracts. Human proof is missing, and it must never replace prescribed diabetes medicine.
• Food and cosmetic colouring: This is the one use that clearly works. Bixin and norbixin reliably colour cheese, butter, rice and cosmetics. That is a colour effect, not a health effect.

Which foods are rich in Roucou?

1. Cheddar, Red Leicester and other orange cheeses
2. Butter and margarine
3. Smoked fish and some sausages
4. Snack foods and crackers
5. Caribbean and Latin American rice, stews and achiote pastes

Practical Tips:

Annatto is a very common food colour. In Europe it appears on labels as E160b. If you react to it, read labels on cheese, butter and snacks with care.

What are the side effects of Roucou?

• Itchy skin, hives or rash
• Swelling of the lips, face or eyelids
• Stuffy nose, wheeze or cough in sensitive people
• Rare severe allergic reaction with throat swelling and trouble breathing
• Nausea or stomach upset, mainly from strong teas or capsules
• Loose stools
• Orange staining of hands, mouth or stool
• Possible drop in blood sugar if you take diabetes medicine

Good to know:

Most people eat annatto for years with no trouble. It is one of the most widely used natural food colours in the world.

Allergy is the main documented risk. Case reports describe hives, swelling and, rarely, severe reactions after annatto-coloured foods. This is uncommon but real.

Concentrated teas, extracts and capsules are far less studied than the food colour. Treat them with more care, especially if you already take medicines.

How much Roucou should you take?

• Recommended daily: There is no agreed medicinal dose for roucou, and this page does not give one. As a food colour, the amount you eat is tiny. Food safety bodies have set an acceptable daily intake for bixin of about 6 mg per kilogram of body weight. Supplement labels for annatto tocotrienol capsules commonly list 125 mg to 300 mg a day. That is a label figure, not advice for you. Ask a pharmacist or doctor before you start any concentrated product.
• Best time of day: Timing does not matter for the food use. Season your food whenever you cook. If you take tocotrienol capsules, people usually take them with the largest meal of the day. That is for absorption, not for any special body clock effect.
• With or without food: Take it with food. The pigments and the tocotrienols dissolve in fat, so a meal with some oil helps your body absorb them. Taking concentrated capsules on an empty stomach is more likely to cause nausea.
• Time to effect: As a colour, the effect is instant. As a remedy, there is no reliable time to effect, because the benefit itself is unproven. It may do nothing at all for your symptoms. If you feel worse at any point, stop and speak to a doctor.
• How long to take it: Traditional "wash" teas were drunk for a few days at a time, not for months. No study tells us how long remedy-strength roucou is safe to take. As a seasoning, it is eaten lifelong with no known problem. For capsules, follow the label and review it with a clinician if you want to keep going past a few weeks.