Hoodia (Hoodia gordonii): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Hoodia gordonii work to suppress appetite?

Hoodia gordonii contains P57, a steroidal glycoside believed to act on the hypothalamus—the brain region controlling hunger signals. P57 may mimic glucose's effects on nerve cells, tricking the brain into sensing fullness and reducing appetite. However, this mechanism is based on preliminary animal studies (Evidence Level C), and human clinical trials confirming this action remain limited. More research is needed to fully understand Hoodia's appetite-suppression mechanism in humans.

Does Hoodia gordonii interact with any medications?

Hoodia gordonii may interact with several medication types. Because it can affect blood sugar levels, Hoodia may interfere with diabetes medications such as insulin or oral hypoglycemics (Evidence Level C). Additionally, Hoodia may increase heart rate and blood pressure, potentially reducing the effectiveness of antihypertensives, beta-blockers, and other cardiovascular drugs. Liver effects have also been reported, meaning Hoodia could theoretically interact with medications metabolized by the liver. Always consult a healthcare provider before combining Hoodia with prescription medications.

What is the recommended dosage for Hoodia gordonii?

The typical adult dosage for Hoodia gordonii extract is 400-800mg daily, often divided into doses taken before meals. However, standardized dosing guidelines are not well established due to limited clinical research (Evidence Level C). Product quality and P57 content vary significantly between brands, making optimal dosing difficult to determine. Always follow manufacturer instructions on product labels and consult a healthcare professional for personalized guidance, particularly if you have underlying health conditions.

Is Hoodia gordonii safe during pregnancy and breastfeeding?

Hoodia gordonii is considered unsafe during pregnancy and breastfeeding (Evidence Level D). The appetite-suppressing effects could restrict essential nutrient intake needed for fetal development and infant growth. Hoodia may also increase heart rate and blood pressure, which could be harmful during pregnancy. No safety data exists for nursing mothers, and it is unknown whether Hoodia compounds pass into breast milk. Pregnant or breastfeeding women should avoid Hoodia entirely and consult their healthcare provider for appropriate alternatives.

Is Hoodia gordonii effective for weight loss?

Despite traditional use by San Bushmen to suppress appetite during long hunts, scientific evidence for Hoodia's weight-loss effectiveness remains limited (Evidence Level C). Preliminary animal studies suggested P57 could reduce food intake, but human clinical trials have been small, poorly designed, or inconclusive. Some studies showed no significant difference in appetite or weight loss compared to placebo. Quality control issues with commercial Hoodia supplements also raise concerns about product authenticity. More rigorous clinical research is needed before Hoodia can be recommended for weight management.

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 29 articles PubMed · modèle : gemma4:31b

Résumé

Hoodia gordonii is a succulent plant from the Kalahari Desert used as a dietary supplement for appetite suppression and weight loss [PMID:31644014, PMID:38256784].

Contexte

Hoodia gordonii (family Apocynaceae) is a spiny, succulent plant native to the Kalahari deserts of South Africa, Namibia, and Botswana [PMID:31644014, PMID:38256784, PMID:21259185].

Usages traditionnels

It was traditionally used by the Khoi-San of South Africa and Namibia as a hunger and thirst suppressant during long hunting trips [PMID:21259185, PMID:18804523].

Composés actifs

The plant contains steroid glycosides, fatty acids, plant sterols, and alcohols [PMID:21315789, PMID:22410262]. The oxypregnane steroidal glycoside P57 (also referred to as P57AS3) is commonly accepted as the active ingredient responsible for appetite suppression [PMID:31644014, PMID:38256784, PMID:21259185]. Other identified compounds include the steroid glycoside H.g.-12 and various pregnane glycosides such as hoodigosides W-Z and hoodistanalosides A-B [PMID:20930049, PMID:19303614].

Mécanisme d'action

The steroid glycoside H.g.-12 activates the human bitter receptor TAS2R14, which induces the release of cholecystokinin (CCK) from enteroendocrine cells; CCK is known to suppress appetite via the vagus nerve [PMID:20930049].

Preuves cliniques

Preuve BWeight loss/Appetite suppression

A 15-day RCT in healthy, overweight women found that purified Hoodia gordonii extract (HgPE) was less well tolerated than placebo, with significant changes in blood pressure, pulse, heart rate, bilirubin, and alkaline phosphatase, though no serious adverse events occurred [PMID:21993434].

Preuve CWeight loss/Appetite suppression

A review stated there is no clear evidence that herbal preparations, including Hoodia gordonii, cause sustained long-term weight loss in humans [PMID:30738773].

Sécurité et effets indésirables

Hoodia gordonii is classified as having moderately severe adverse effects in an overview of systematic reviews [PMID:23472485]. Reported side effects include nausea, emesis, and disturbances of skin sensation [PMID:21993434], as well as increased blood pressure and elevated pulse rate [PMID:24307991]. It has not been implicated in causing clinically apparent liver injury or serum enzyme elevations [PMID:31644014]. In animal studies, high doses (50mg/kg/day) in mice caused reduced maternal feed intake, body weight gain, and delayed fetal development [PMID:22410260]. Genotoxicity testing in mice and in vitro assays showed no evidence of genotoxic activity [PMID:21315789].

Grossesse et allaitement

In a mouse prenatal developmental toxicity study, doses of 15 or 50mg/kg/day reduced fetal weights and ossification of some bones, though no treatment-related malformations were observed [PMID:22410260].

Interactions médicamenteuses

In vitro studies using the Caco-2 cell model showed that P57 inhibited CYP3A4 activity (IC50 = 45 microM), while it did not inhibit CYP1A2, 2C9, or 2D6 [PMID:18612942].

Synthèse des preuves

Evidence for the efficacy of Hoodia gordonii for weight loss is sparse and lacks clear evidence for long-term success in humans; safety data is mixed, with some reports of cardiovascular side effects and moderate severity in systematic reviews, though it appears non-genotoxic in animal models.

Sources PubMed

1.PMID: 36479472 (2022) — Dietary supplements for obesity. · Journal of preventive medicine and hygiene
2.PMID: 23472485 (2013) — Adverse effects of herbal medicines: an overview of systematic reviews. · Clinical medicine (London, England)
3.PMID: 31644014 (2012) — Hoodia gordonii: to eat, or not to eat. · Journal of ethnopharmacology
4.PMID: 38256784 (2024) — Identification and Functional Characterization of Oxidosqualene Cyclases from Medicinal Plant Hoodia gordonii. · Plants (Basel, Switzerland)
5.PMID: 21259185 (2011) — Hoodia gordonii: an up-to-date review of a commercially important anti-obesity plant. · Planta medica
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Hoodia

Sources et citations

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