Independent product information • Affiliate-supported • Last updated
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Independent EndoPeak research

References & Evidence Sources

The core independent references used across EndoPeak, plus an explanation of how product-label and seller-reported facts are handled.

Reviewed and updated: September 12, 2026

Product-specific primary sources

Current product label: The product images supplied for this build are the primary source for serving size, ingredient identities and amounts, suggested use, warnings, storage and other label statements.

Current commercial materials: Seller materials were used to verify package prices, current shipping claims, promotional bonus wording and the advertised 60-day guarantee. At the site owner's instruction, seller URLs are not published as links or references.

Regulatory and consumer sources

  1. FDA 101: Dietary Supplements
  2. FDA: Information for Consumers Using Dietary Supplements

Nutrition sources

  1. NIH Office of Dietary Supplements: Zinc — Health Professional Fact Sheet
  2. NIH Office of Dietary Supplements: Magnesium — Health Professional Fact Sheet

Botanical sources

  1. NCCIH: Hawthorn
  2. NCCIH: Saw Palmetto

Peer-reviewed / PubMed-indexed sources

  1. Tribulus terrestris systematic review
  2. Tribulus randomized controlled trial
  3. Tribulus randomized trial with negative/limited findings
  4. Tongkat Ali meta-analysis
  5. Tongkat Ali randomized trial
  6. Chrysin disposition in humans
  7. Chrysin-containing preparation and urinary testosterone
  8. Cissus quadrangularis systematic review
  9. Epimedium/icariin review
  10. Review of ingredients in male testosterone/ED supplements
  11. Systematic review of testosterone-booster ingredients

Evidence limitations

A source appearing here does not mean it supports the effectiveness of EndoPeak as a finished product. Studies are linked on ingredient pages for the question they actually investigate.