Beta Sitosterol (Hypoxis rooperi): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does beta sitosterol work for BPH?

Beta-sitosterol works by inhibiting 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT), which contributes to prostate enlargement. It also demonstrates anti-inflammatory effects on prostate tissue and may reduce prostate cell proliferation. Additionally, beta-sitosterol competes with cholesterol for intestinal absorption, explaining its cholesterol-lowering properties. Evidence level C supports these mechanisms for improving BPH symptoms and urinary flow.

Can I take beta sitosterol with cholesterol lowering medications?

Beta-sitosterol should be avoided when taking cholesterol-lowering medications such as statins or ezetimibe. Combining them may interfere with the effectiveness of your prescribed medication, as both work through cholesterol-related pathways. Beta-sitosterol may also reduce absorption of fat-soluble vitamins (A, D, E, K). Always consult your healthcare provider before combining beta-sitosterol with any cholesterol-lowering treatment.

What is the recommended daily dosage for beta sitosterol?

The recommended adult dosage for beta-sitosterol is 60-130mg daily, typically divided into two doses with meals to enhance absorption. For BPH treatment, clinical studies have commonly used doses at the higher end of this range. Always follow product label instructions and consult a healthcare provider for personalized dosing recommendations, especially if you have underlying health conditions or take other medications.

Is beta sitosterol safe to take during pregnancy?

Beta-sitosterol is considered unsafe during pregnancy and should be avoided. There is insufficient safety data to support its use in pregnant or breastfeeding women. As a phytosterol that affects hormone pathways and cholesterol metabolism, beta-sitosterol could potentially interfere with fetal development. Women who are pregnant, planning pregnancy, or breastfeeding should not take beta-sitosterol supplements without explicit medical supervision.

What are the side effects of taking beta sitosterol?

Beta-sitosterol is generally well-tolerated, with most side effects being mild. The most common side effect is gastrointestinal disturbance, including nausea, gas, or diarrhea, particularly when starting supplementation. Rarely, some men report erectile dysfunction or decreased libido. These effects typically resolve when supplementation is discontinued. If you experience persistent or severe side effects, discontinue use and consult your healthcare provider.

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

Beta-sitosterol is a naturally occurring phytosterol found in various plants, including Hypoxis species, with demonstrated antioxidant, anti-inflammatory, and anti-cancer properties [PMID:35995256, PMID:37868551].

Contexte

Beta-sitosterol is an abundant plant-derived nutrient and phytosterol found in nuts, seeds, vegetable oils, and legumes [PMID:39619995, PMID:39318007]. It is structurally similar to cholesterol, differing by the addition of an ethyl group [PMID:39619995].

Usages traditionnels

Hypoxis species are used in African traditional medicine to treat tuberculosis, chest infections, nervous and urinary disorders [PMID:24041457]. Specifically, the tuberous rootstock (corm) of Hypoxis hemerocallidea is used traditionally for wasting diseases, testicular tumours, insanity, barrenness, impotency, bad dreams, and intestinal parasites [PMID:32527245].

Composés actifs

Beta-sitosterol is a major bioactive constituent [PMID:39619995]. Other constituents in Hypoxis species include norlignans derived from the union of two phenylpropanoid units [PMID:1318985].

Mécanisme d'action

Beta-sitosterol exerts effects through multiple pathways: it regulates catalase to inhibit lipid deposition in vascular smooth muscle cells [PMID:39165938], downregulates FOXM1 to inhibit hepatocellular carcinoma growth [PMID:38063438], and modulates the AMPK/MLCK pathway to reduce colonic inflammation [PMID:40400313]. It also activates the SIRT1 pathway to enhance brain 5-HT synthesis [PMID:40961541] and regulates the mTOR-IMP1-Adipoq axis to suppress osteoporosis [PMID:39848018].

Preuves cliniques

Preuve CBenign Prostatic Hyperplasia (BPH)

Early clinical trials for Hypoxis rooperi showed mixed efficacy results, with some suggesting possible benefit, but evidence is considered questionable or inconclusive due to poor product standardization and study design [PMID:27180172, PMID:12084323].

Preuve DColorectal Cancer

In vitro and xenograft models show beta-sitosterol suppresses proliferation, induces apoptosis, and enhances sensitivity to 5-fluorouracil and oxaliplatin [PMID:40889204].

Preuve DUlcerative Colitis

In mouse models, beta-sitosterol significantly ameliorated colonic inflammation and reduced inflammatory mediators like IL-6 and iNOS [PMID:40400313].

Preuve DHepatocellular Carcinoma

In xenograft mouse models, beta-sitosterol significantly inhibited HepG2 cell proliferation, migration, and invasion [PMID:38063438].

Sécurité et effets indésirables

Pharmacological screening has indicated anti-inflammatory and antioxidant effects without significant toxicity [PMID:35995256].

Synthèse des preuves

The evidence for beta-sitosterol is primarily based on in vitro and in vivo animal models (Level D) and review articles (Level C). Clinical evidence for human use in BPH is inconclusive.

Sources PubMed

1.PMID: 27180172 (2016) — Phytotherapy for Benign Prostatic Hyperplasia. · Current urology reports
2.PMID: 32527245 (2020) — African potato (Hypoxis hemerocallidea): a systematic review of its chemistry, pharmacology and ethno medicinal properties. · BMC complementary medicine and therapies
3.PMID: 11276294 (2000) — Phytotherapy for benign prostatic hyperplasia. · Public health nutrition
4.PMID: 39165938 (2024) — β-sitosterol alleviates atherosclerosis by regulating catalase. · Heliyon
5.PMID: 28710625 (2017) — Selection of Biodegrading Phytosterol Strains. · Methods in molecular biology (Clifton, N.J.)
6.

Beta Sitosterol

Sources et citations

Calculer une dose sûre de Beta Sitosterol

Ganoderma Tsugae

Ribes nigrum

Auricularia Auricula

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Beta Sitosterol

Sources et citations

Calculer une dose sûre de Beta Sitosterol

Plantes associées

Ganoderma Tsugae

Ribes nigrum

Auricularia Auricula

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales