Andiroba

What is Andiroba?

Andiroba (Carapa guianensis) is a towering rainforest tree native to the Amazon Basin, found across Brazil, Peru, Colombia, and the Caribbean. Its large seeds yield a thick, slightly bitter oil that has been a cornerstone of Amazonian indigenous medicine for generations. The oil, bark, and leaves are all used medicinally, with the seed oil being the most researched and commercially available form today.

How does Andiroba work?

Andiroba's key active compounds are limonoids — particularly gedunin and andirobin — which work similarly to natural anti-inflammatory agents by interfering with pathways that trigger swelling, pain, and immune overreaction. The oil is rich in oleic and linoleic acids that support skin barrier repair and moisture retention. Its bitter limonoids also have natural insect-deterrent and antiparasitic properties, making it a multifunctional botanical.

What forms does Andiroba come in?

Cold-pressed andiroba oil is the most traditional and widely used form — applied directly to skin, joints, or muscles. Oral capsules are available for systemic anti-inflammatory effects. Bark decoctions (teas) are used traditionally for fever and respiratory complaints. Creams and salves blended with andiroba oil are popular in Brazil for arthritis and muscle pain relief.

Where it comes from:

Indigenous Amazonian peoples — including the Kayapó, Ribeirinho, and other forest communities — have used andiroba oil for centuries to repel insects, treat skin infections, heal wounds, and ease joint pain. It was adopted by Brazilian folk medicine and later attracted scientific interest for its limonoid content. It remains one of the most widely sold traditional botanical oils in Brazil and is gaining international recognition in natural health and cosmetic markets.

What does Andiroba help with?

• Joint pain and arthritis: Andiroba oil applied to painful joints helps reduce swelling and discomfort thanks to its limonoid compounds, which calm inflammatory activity in the tissues. It has been used traditionally in Amazonian communities for arthritis-like pain and is now studied for this in Brazilian clinical settings.
• Muscle soreness and inflammation: Massaging andiroba oil into sore muscles after exertion can ease tenderness and reduce local inflammation. Its fatty acid content also helps the oil absorb well into skin, supporting deeper tissue relief.
• Insect bites and repellent use: Andiroba oil is a well-known natural insect repellent in Amazonian tradition, applied to exposed skin to deter mosquitoes and other insects. The bitter limonoids — especially andirobin — are believed to be responsible for its repellent effect, and this use is backed by both ethnobotanical documentation and preliminary laboratory work.
• Skin wounds and ulcers: Traditional use and early clinical observation support andiroba oil's role in speeding wound closure and reducing the risk of infection in minor cuts, abrasions, and skin ulcers. Its antimicrobial and anti-inflammatory properties create a supportive environment for skin healing.
• Skin inflammation and dermatitis: The oil's anti-inflammatory compounds soothe redness, itching, and irritation associated with inflamed or reactive skin. It is commonly blended into skin-care products in Brazil for this purpose and is generally well tolerated even on sensitive skin.
• Fever (traditional use): Andiroba bark tea has long been used by indigenous Amazonian healers to bring down fever and ease flu-like symptoms. While modern clinical data on this specific use is limited, the anti-inflammatory and antipyretic properties of its limonoid compounds offer a plausible explanation.
• Parasitic infections (traditional/emerging): Gedunin, a key limonoid in andiroba, has shown antiparasitic activity in laboratory studies against malaria-related parasites and other organisms. Indigenous use of andiroba for parasitic conditions aligns with these early findings, though human clinical trials on this indication remain limited.
• Dry and damaged skin: Rich in skin-compatible fatty acids like oleic and linoleic acid, andiroba oil acts as an effective emollient that restores softness and moisture to dry, rough, or sun-damaged skin. It is absorbed without leaving a heavy residue, making it suitable for regular use.

What can Andiroba help prevent?

• Insect-borne illness (through use as topical mosquito repellent)
• Secondary skin infection in minor wounds (through antimicrobial topical application)

Which foods are rich in Andiroba?

Andiroba is not found in food — it is an Amazonian tree oil used medicinally. However, you can support the same anti-inflammatory pathways through your diet: eat plenty of fatty fish (salmon, sardines) for omega-3s, extra virgin olive oil for oleic acid and polyphenols, walnuts and flaxseed for linoleic acid, and colorful vegetables and berries rich in antioxidant flavonoids. These foods work in parallel with andiroba's limonoid compounds to reduce whole-body inflammation.

What are the side effects of Andiroba?

• Skin irritation or allergic reaction (patch test recommended before widespread topical use)
• Stomach upset or nausea with high oral doses
• Bitter taste with oral capsule or decoction use
• Not recommended in pregnancy (limonoids may have uterotonic properties based on traditional caution)
• Rare contact dermatitis in individuals with nut or seed oil sensitivities

Good to know:

Andiroba is considered safe for most people when used topically. Oral use is less studied but is traditionally practiced in Amazonian communities. The main cautions are around pregnancy (avoid oral use), skin allergy in sensitive individuals, and avoiding ingestion of large amounts of raw oil.

How much Andiroba should you take?

• Recommended daily: Topical: apply undiluted cold-pressed oil or a cream containing 5–20% andiroba oil to affected area 1–3 times daily. Oral capsules: 500–1000 mg standardized extract once or twice daily, following product labeling. Traditional bark tea: 1–2 cups daily of a bark decoction (not for long-term unsupervised use).
• Best time of day: Topical: apply morning and evening, or after physical activity. Oral: with meals to reduce any stomach sensitivity.
• With or without food: Oral forms best taken with food to minimize digestive discomfort.
• Time to effect: Topical relief of pain or inflammation: within a few days of consistent use. Systemic anti-inflammatory effects from oral supplementation: 2–4 weeks.
• How long to take it: Topical use can be ongoing as needed. Oral use is best limited to defined periods of 4–8 weeks; consult a practitioner before continuous long-term oral supplementation.