Andiroba Seed

Andiroba seed (Carapa guianensis) is rich in gedunin-type limonoids—especially 6α-acetoxygedunin—that suppress inflammation by directly binding myeloid differentiation protein 2 (MD-2) on the TLR4 complex, inhibiting NF-κB signaling and reducing pro-inflammatory cytokines TNF-α and IL-1β, while its oleic- and palmitic-acid-rich oil delivers potent antioxidant, hepatoprotective, and wound-healing activity. A 2024 scoping review in the Journal of Ethnopharmacology (PMID 38432579) confirmed andiroba oil's immunomodulatory and tissue-repair benefits across in vitro, in vivo, and clinical models, and a clinical study (PMID 32920135) demonstrated that topical andiroba oil matched low-power laser therapy in resolving oral mucositis in pediatric chemotherapy patients.

Origin & History

Andiroba Seed (Carapa guianensis) is derived from a tree native to the Amazon rainforest and other tropical regions of Central and South America. Its seeds are highly valued in functional nutrition for their unique composition of essential fatty acids and limonoids, supporting joint, skin, and immune health.

Historical & Cultural Context

Andiroba Seed has been traditionally revered by Amazonian tribes for centuries for wound healing, anti-inflammatory treatments, and spiritual protection rituals. It was also a vital tool in Afro-Brazilian healing baths and massages, and against tropical insect-borne diseases.

Health Benefits

- **Supports joint and**: muscle health through potent anti-inflammatory limonoids and fatty acids.
- **Promotes skin healing,**: hydration, and elasticity by nourishing the dermal layer and reducing inflammation.
- **Protects against oxidative**: stress and supports cellular longevity with its rich antioxidant profile.
- **Offers antimalarial and**: antiparasitic effects, contributing to immune defense.
- **Supports liver function**: and detoxification processes through its bioactive compounds.
- **Provides mild analgesic**: and insect-repelling properties, traditionally used for comfort and protection.

How It Works

The primary anti-inflammatory mechanism of andiroba seed centers on gedunin-type tetranortriterpenoid limonoids—particularly 6α-acetoxygedunin—which bind directly to myeloid differentiation protein 2 (MD-2) within the TLR4/MD-2 receptor complex, competitively blocking lipopolysaccharide (LPS) recognition and preventing downstream activation of NF-κB signaling, thereby suppressing transcription of pro-inflammatory cytokines TNF-α, IL-1β, and IL-6. Andiroba limonoids also inhibit the phosphorylation of IκBα, stabilizing the NF-κB inhibitory complex in the cytoplasm and attenuating COX-2 and iNOS expression. Hepatoprotective activity is mediated by limonoids that reduce D-galactosamine/TNF-α-induced caspase activation in hepatocytes (PMID 27104518), while the oil's high oleic acid content (~55%) enhances dermal barrier repair and modulates prostaglandin E2 synthesis. Antioxidant defense is supported through radical-scavenging phenolic compounds and tocopherols that neutralize reactive oxygen species and protect cellular lipids from peroxidation (PMID 29854079).

Scientific Research

Fonseca et al. (2024) published a comprehensive scoping review in the Journal of Ethnopharmacology covering in vitro, in vivo, and clinical evidence that andiroba oil exerts significant immunomodulatory, anti-inflammatory, and wound-healing effects (PMID 38432579). Soares et al. (2021) conducted a clinical study in pediatric chemotherapy patients showing that topical andiroba oil was as effective as low-power laser therapy for treating oral mucositis, with comparable healing timelines and pain reduction (PMID 32920135). Ninomiya et al. (2016) isolated hepatoprotective limonoids—including gedunin and 6α-acetoxygedunin—from andiroba seeds that protected HepG2 hepatocytes against D-galactosamine/TNF-α-induced cytotoxicity in the International Journal of Molecular Sciences (PMID 27104518). Araujo-Lima et al. (2018) evaluated crabwood seed oils in Oxidative Medicine and Cellular Longevity, confirming robust antioxidant activity via DPPH and ORAC assays alongside a favorable genotoxic safety profile at typical-use concentrations (PMID 29854079).

Clinical Summary

Current evidence is limited to in vitro and animal studies, with no human clinical trials reported. Laboratory studies show 23 isolated limonoids inhibited LPS-induced NO production in RAW264.7 macrophages, with gedunin-type compounds demonstrating superior potency based on IC50 values. Nanoemulsion at 360 μg/mL accelerated keratinocyte migration for wound closure without cytotoxicity in cell culture models. Human clinical data is needed to establish therapeutic efficacy and safety profiles for oral supplementation.

Nutritional Profile

- Essential fatty acids (oleic, palmitic, stearic, linoleic acids)
- Vitamin E
- Limonoids (andirobin, gedunin)
- Triterpenes
- Flavonoids
- Phenolic compounds
- Plant sterols

Preparation & Dosage

- Primarily used as a cold-pressed oil extracted from the seeds.
- For topical application, apply 2–3 drops of oil to affected areas as needed.
- For oral supplementation, 500–1000 mg of standardized oil extract daily, only under professional supervision.

Synergy & Pairings

Role: Fat + fiber base
Intention: Detox & Liver | Skin & Collagen
Primary Pairings: Copaiba Oil (Copaifera spp.); Tea Tree Oil (Melaleuca alternifolia); Lavender Oil (Lavandula angustifolia); Shea Butter (Vitellaria paradoxa)

Safety & Interactions

Andiroba seed oil has been used topically and orally in traditional Amazonian medicine with a generally favorable safety profile; Milhomem-Paixão et al. (2016) reported no significant genotoxicity or hematotoxicity in a murine model at standard doses (PMID 27192128), and Araujo-Lima et al. (2018) confirmed a safe genotoxic profile for seed oils at typical concentrations (PMID 29854079). However, there is insufficient clinical data to establish safe oral dosing in humans, and ingestion of large quantities of the bitter oil has been traditionally associated with nausea and gastrointestinal discomfort. No specific CYP450 drug interactions have been formally documented, but given the oil's limonoid content and potential immunomodulatory effects, concurrent use with immunosuppressants, anticoagulants, or anti-inflammatory drugs should be approached with caution and physician guidance. Pregnant and breastfeeding individuals should avoid internal use due to the absence of reproductive safety data.