Butea superba to Improve Testosterone - Quick Reference Sheet
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Butea superba to Improve Testosterone

Created on 06/19/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 – Audit

Butea superba is a Thai tonic herb sold for testosterone and libido, but its reputation outpaces its data. The strongest signal is improved self-reported erectile function through better blood flow, not hormones. Direct measurements show no reliable testosterone rise, even a drop at high doses, plus liver-stress and product-adulteration concerns. Best treated as a short, closely monitored trial. (Full Review)

Protocol

Standard amounts used
~100 mg–1 g/day
~100 mg standardized extract favored for a wider safety margin over gram-level crude powder
Best time of day
Morning
Not established; commonly taken in the morning or before anticipated sexual activity
Single vs. split dosing
Single morning dose
Lower daily amounts often taken once in the morning; higher traditional amounts sometimes split
Time to effect
Blood-Flow Benefit
Within weeks
Vascular effects were acute in animals, so any blood-flow benefit may appear within weeks
Erectile-Function Assessment
~3 months
In the small erectile-function trial, improvements were assessed over about three months
Hormonal Change
Not reliably seen
Hormonal change, if any, is not reliably seen at all

Benefits

Contraindications
  • Nitrates (nitroglycerin, isosorbide)
  • Hormone-sensitive cancers (e.g., prostate cancer)
  • Significant liver disease (e.g., cirrhosis / Child-Pugh Class B–C)
  • Uncontrolled cardiovascular disease
  • Women (especially pregnancy or breastfeeding)
  • Under 18
    •
Key Interactions
  • PDE5 inhibitors (sildenafil, tadalafil, vardenafil)
  • Antihypertensive and other vasodilating drugs
  • OTC medications (NSAIDs, acetaminophen, antihistamines/decongestants)
  • Other blood-pressure-lowering supplements (L-arginine, L-citrulline, beetroot/nitrate sources, Panax ginseng)
  • Hormone-active supplements (soy isoflavone extracts, Tribulus terrestris, fenugreek)
  • Hepatotoxic agents (alcohol)
    •

Risk & Side Effects

  • High: [risks_high]
    •
  • Medium: Hepatic enzyme elevation and blood-chemistry changes; hyperandrogenemia and hormonal disruption
    •
  • Low: Genotoxicity at high doses
    •
  • Speculative: Product adulteration with prescription drugs; cardiovascular and blood-pressure effects
    •

Monitoring

Marker Target Why
Total testosterone ~500–900 ng/dL (adult men) Tests the core claim — whether levels actually change
Free testosterone ~15–25 pg/mL The bioavailable fraction that drives effects
LH (luteinizing hormone) ~1.5–9 IU/L Detects whether the testicular signal shifts
ALT / AST ALT ~10–26 U/L; AST ~10–26 U/L Screens for the liver stress seen at high animal doses
ALP (alkaline phosphatase) ~40–100 U/L Flagged as elevated in animal toxicology
Estradiol ~10–30 pg/mL (men) Catches estrogenic activity from the herb's isoflavones

Cadence: Baseline before first dose, then at 8–12 weeks, then every 6–12 months if use continues

Qualitative Assessment

  • Erectile function and libido
  • Energy and mood
  • Any signs of liver stress
Not medical advice. Educational distillation of a single evidence review. Confirm any decision with a qualified clinician, especially in the presence of prescription drugs or chronic conditions.