Croton cajucara (Croton cajucara): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Croton cajucara work for diabetes and liver health?

Croton cajucara contains an active compound called trans-dehydrocrotonin, a clerodane diterpene responsible for many of its medicinal effects. Research suggests this compound helps regulate glucose metabolism and offers hepatoprotective benefits by reducing oxidative stress. While traditionally used for liver protection, the mechanism involves modulating insulin sensitivity and potentially improving lipid profiles. However, current evidence is limited primarily to animal studies (Evidence Level C), and more human clinical trials are needed to fully understand its mechanism of action.

What are the drug interactions of Croton cajucara?

Due to its effects on blood sugar and liver enzymes, Croton cajucara may interact with antidiabetic medications like metformin or insulin, potentially causing hypoglycemia when combined. Additionally, because the herb affects liver function, it may alter the metabolism of drugs processed by the cytochrome P450 system. Patients taking pharmaceuticals metabolized by the liver should exercise caution. Always consult a healthcare provider before combining this herb with prescription medications.

What is the recommended dosage for Croton cajucara tea?

The traditional dosage for Croton cajucara involves preparing a decoction or tea using 5 to 10 grams of dried bark per cup of water. This is typically consumed once or twice daily. Because the herb contains potent diterpenes that can become toxic in high amounts, users should strictly adhere to these traditional preparation guidelines and avoid exceeding the recommended duration of use without professional supervision.

Is Croton cajucara safe to take during pregnancy?

No, Croton cajucara is considered unsafe during pregnancy. The plant contains diterpenes, specifically trans-dehydrocrotonin, which have demonstrated toxic effects and may stimulate uterine contractions, posing a risk of miscarriage. Traditional contraindications explicitly advise against use by pregnant women. Due to the lack of safety data and the presence of potentially toxic compounds, pregnant and breastfeeding women should strictly avoid this herb.

Can Croton cajucara cause liver damage?

Paradoxically, while traditionally used for liver protection, Croton cajucara can cause hepatotoxicity if taken in high doses or for prolonged periods. The active compound trans-dehydrocrotonin can stress hepatic function when over-consumed. Symptoms of toxicity may include gastrointestinal upset and elevated liver enzymes. Individuals with pre-existing liver disease should avoid this herb, as it may exacerbate their condition despite its traditional reputation as a liver remedy.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Croton cajucara, known as sacaca, is an Amazonian plant with demonstrated anti-inflammatory, antidiabetic, and gastroprotective properties [PMID:37587801, 21140094, 10344636].

Contexte

Croton cajucara Benth. is a shrub or tree native to the Brazilian Amazon region, locally referred to as "sacaca" [PMID:21140094, 28826140, 23325101]. It exists in two known morphotypes: white and red sacaca [PMID:23325101].

Usages traditionnels

In Brazilian Amazonia, infusions of the leaves and stem bark are popularly used to treat diabetes, hepatic disorders, and various gastrointestinal symptoms [PMID:21140094, 28826140, 10344636].

Composés actifs

The major bioactive constituent extracted from the bark is the 19-nor-clerodane diterpene trans-dehydrocrotonin (t-DCTN or DHC) [PMID:37587801, 9525103]. Essential oils from the red morphotype are rich in 7-hydroxycalamenene and linalool [PMID:37886132, 23325101]. Other identified compounds include O-glycosides of kaempferol and quercetin, flavonoid-C-glycosides, tannins, cinnamic acid derivatives, coumarins, and alkaloids [PMID:28826140, 22811599].

Mécanisme d'action

Gastroprotective effects of the essential oil are associated with the involvement of heat-shock protein-70, glutathione, sulfhydryl compounds, and nitric oxide [PMID:21488752]. The plant exhibits antioxidant activity via DPPH-scavenging and inhibition of lipid peroxidation in hepatic tissue [PMID:22811599, 16394531].

Preuves cliniques

Preuve DDiabetes/Hyperlipidemia

Aqueous extract and t-DCTN significantly reduced blood glucose and triglyceride levels in diabetic rats [PMID:21140094, 11903418]. Bark infusion reduced plasma triglyceride levels by 40% in hyperlipidemic mice [PMID:15381962].

Preuve DGastric Ulcers

t-DCTN and essential oils showed significant antiulcerogenic effects in rat models induced by ethanol, hypothermic restraint stress, and pylorus ligature [PMID:9525103, 10344636]. A polysaccharide fraction from leaves also promoted gastroprotection in ethanol-induced models [PMID:27864055].

Preuve DInflammation

Fractions of a leaf decoction and the bark's essential oil exhibited anti-inflammatory and antinociceptive properties in rodent models [PMID:28826140, 10678502].

Preuve DInfections (Antimicrobial/Antiparasitic)

7-hydroxycalamenene-rich essential oils showed activity against MRSA, Mycobacterium tuberculosis, and Candida species [PMID:23325101, 27019560]. Extracts and terpenes showed activity against Leishmania amazonensis and Leishmania chagasi [PMID:24088644, 26547537, 16099722].

Sécurité et effets indésirables

While some studies report t-DCTN as non-genotoxic [PMID:11745017, 10587408], other research indicates potential hepatotoxicity, with reports of zonal necrosis and degeneration in rat livers after extract administration [PMID:18372957]. It has been compared to Germander in clinical cases of liver disease [PMID:15586905]. In vitro, t-DCTN showed dose-dependent cytotoxicity in V79 fibroblasts and rat hepatocytes [PMID:9525103, 10483371].

Synthèse des preuves

The evidence is primarily based on in vitro studies and animal models (Level D), demonstrating significant pharmacological potential but highlighting concerns regarding hepatotoxicity.

Sources PubMed

1.PMID: 37587801 (2024) — Croton cajucara: Patents and Nanotechnological Advances. · Recent patents on nanotechnology
2.PMID: 21140094 (2010) — Hepatics alterations and genotoxic effects of Croton cajucara Benth (SACACA) in diabetic rats. · Arquivos de gastroenterologia
3.PMID: 28826140 (2017) — Phytochemical analysis and anti-inflammatory evaluation of compounds from an aqueous extract of Croton cajucara Benth. · Journal of pharmaceutical and biomedical analysis
4.PMID: 37886132 (2023) — Red sacaca essential oil-loaded nanostructured lipid carriers optimized by factorial design: cytotoxicity and cellular reactive oxygen species levels. · Frontiers in pharmacology
5.PMID: 18372957 (2008) — Histologic evaluation of rats' liver after Croton cajucara Benth (sacaca) administration.

Croton cajucara

Sources et citations

Calculer une dose sûre de Croton cajucara

Pterocarpus santalinus

Physalis peruviana

Withania coagulans

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Croton cajucara

Sources et citations

Calculer une dose sûre de Croton cajucara

Plantes associées

Pterocarpus santalinus

Physalis peruviana

Withania coagulans

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales