Pygeum (Prunus africana)

Pygeum (Prunus africana) is an African tree bark extract containing beta-sitosterol and ferulic acid esters that may support prostate health. The extract appears to work by inhibiting 5-alpha-reductase activity and reducing inflammatory prostaglandin synthesis in prostate tissue.

Origin & History

Pygeum is an extract derived from the bark of Prunus africana, an evergreen tree native to the highlands of sub-Saharan Africa. The extract is produced by pulverizing dried bark and extracting with organic solvents at 35-40°C, followed by filtration, concentration, and vacuum drying to yield a greenish, pasty mass with a bitter almond smell. Commercial extracts are standardized to contain 15-18% total sterols, particularly β-sitosterol.

Historical & Cultural Context

Pygeum from Prunus africana bark has been used in traditional African medicine for prostatic disorders. Specific historical contexts, traditional systems, or duration of use were not detailed in the available research.

Health Benefits

• Prostate health support - traditionally used for prostatic disorders, though clinical evidence is limited
• Anti-BPH activity - associated with sterol content, but specific clinical trial data unavailable
• Traditional urinary system support - historical use in African medicine for prostate-related conditions
• Phytosterol supplementation - provides standardized β-sitosterol (15-18% content)
• Note: Clinical evidence from RCTs or meta-analyses was not available in the research dossier

How It Works

Pygeum's beta-sitosterol content inhibits 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT), potentially reducing prostate enlargement. The extract's ferulic acid esters demonstrate anti-inflammatory effects by inhibiting cyclooxygenase and lipoxygenase pathways. Additionally, pygeum may modulate androgen receptor activity and reduce inflammatory cytokine production in prostate cells.

Scientific Research

The research dossier indicates no specific clinical trials, RCTs, or meta-analyses with PMIDs were available. While standardized preparations like Tadenan and Pigenil (50 mg capsules twice daily) are noted for prostate-related use, no trial data or study designs were provided in the available research.

Clinical Summary

A 2011 Cochrane review analyzed 18 randomized controlled trials involving 1,562 men with benign prostatic hyperplasia. Studies showed pygeum extract (100-200mg daily) improved urinary symptoms by 19-40% and increased peak urine flow by 16-23% compared to placebo. However, most trials were small (25-85 participants) and of short duration (4-16 weeks). Evidence quality was rated as low to moderate due to methodological limitations and heterogeneity between studies.

Nutritional Profile

Pygeum bark extract is not a conventional food source and thus lacks traditional macronutrient or micronutrient significance. Its profile is defined by bioactive phytochemicals: Phytosterols (primary actives) — β-sitosterol at 15–18% of standardized extract, β-sitosterol-3-O-glucoside (sitosterolin), campesterol, and stigmasterol, collectively contributing to sterol content of approximately 150–180 mg per gram of standardized extract. Pentacyclic triterpenes — ursolic acid and oleanolic acid present at roughly 0.5–1.5% of dry bark extract, contributing anti-inflammatory activity. Ferulic acid esters (fatty acid esters) — n-docosanol and n-tetracosanol ferulates, estimated at 0.5–1% of extract, implicated in prolactin and testosterone modulation at prostatic tissue. Tannins and polyphenols — condensed tannins (proanthocyanidins) at approximately 5–10% dry weight of crude bark, with hydrolysable tannin fractions contributing astringent properties. Atraric acid — a specific phytochemical identified in pygeum at trace concentrations (~0.01–0.05%), noted for androgen receptor antagonism in preclinical models. Fat-soluble content: negligible dietary fats; the lipophilic extract fraction contains the majority of active sterols. Fiber: crude bark contains structural cellulose and lignin, but standardized extracts eliminate these. Vitamins and minerals: not nutritionally relevant at typical supplemental doses (100–200 mg/day of standardized extract). Bioavailability notes: β-sitosterol has inherently low intestinal absorption (~5% of ingested dose) due to active efflux transporters (ABCG5/ABCG8); lipid-based delivery or phytosterol ester forms modestly improve uptake. Ferulic acid esters demonstrate reasonable GI stability. Standard commercial extract is typically 13% total sterols by HPLC, with the lipophilic CO₂ or ethanol extraction method preserving the full triterpene and sterol complement.

Preparation & Dosage

Clinically referenced dosage: 50 mg of standardized Prunus africana extract (DER 200:1, equivalent to 6 mg β-sitosterol) in capsule or tablet form, taken twice daily. Extracts should be standardized to 15-18% total sterols. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Saw Palmetto, Beta-Sitosterol, Stinging Nettle Root, Zinc, Selenium

Safety & Interactions

Pygeum is generally well-tolerated with mild gastrointestinal side effects reported in less than 5% of users, including nausea and stomach upset. No significant drug interactions have been documented in clinical trials, though theoretical interactions with anticoagulant medications may exist. The extract should be avoided during pregnancy and breastfeeding due to insufficient safety data. Men with prostate cancer should consult healthcare providers before use, as hormonal effects are not fully understood.