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1.5/5 Very weak evidence

Hormone-related claims evidence brief

Horny goat weed / icariin

Horny goat weed is an herbal extract containing icariin and related compounds. It is commonly promoted for libido, testosterone, erectile function, and pump-style claims.

Epimedium and icariin are marketed for libido, testosterone, and pump, but human evidence is not strong enough to support broad performance or muscle-building claims.

Libido herb, weak evidence health / strength 6 linked sources Content audit 2026-05-16

Headline Finding

Human evidence is sparse and mostly male-health adjacent; muscle-building and pump claims remain unsupported.

Dose Context

Products vary by Epimedium species, extract ratio, icariin content, and blend partners, so label dose does not reliably map to the small human research base.

Important Caveat

This is a transparency entry for users comparing hormone or male-performance stacks, not an evidence-backed recommendation.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-16
  1. Safety LiverTox safety summary
  2. Trial Epimedium prenylflavonoids RCT
  3. Safety Icariin safety/PK RCT
  4. Systematic review ED herbal remedies systematic review
  5. Meta-analysis ED nutraceutical network meta-analysis
  6. Review Epimedium toxicity case report

How To Read This Rating

The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.

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