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Supplements/Compound

Genistein

Soy isoflavone with bone benefits.

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Overview

Soy isoflavone with bone benefits.

Natural sources
  • Endogenously produced or biosynthesized molecule
  • Standardized pharmaceutical- or food-grade supplement
  • Combined with cofactors that improve absorption or activity
Common forms
  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Mechanism of action

ERβ agonist; tyrosine kinase inhibitor.

Pathways
  • · ERβ agonist
  • · tyrosine kinase inhibitor

Effects on the body

Decreases
bone loss

Organ system effects

Bones

Genistein contributes to bone mineralization, osteoblast activity, or calcium-phosphate homeostasis.

Reproductive

Genistein has documented effects on female reproductive endocrinology and cycle regulation.

Evidence-based benefits

Reduces bone loss

Moderate evidence

Potential side effects

Common
  • · GI upset
Rare
    Serious

      Drug interactions

      Prescription medications (general)
      Always disclose Genistein use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.
      minor

      Supplement interactions

      Pairs well with
      • A high-quality multivitamin
        Covers micronutrient cofactors that support most supplement pathways.
      • Omega-3 (EPA/DHA)
        Foundational anti-inflammatory support that complements most regimens.
      Avoid combining with

      No specific avoidances listed.

      Dosing & bioavailability

      Typical dose
      54 mg
      Best form
      Most evidence is based on the capsule or softgel form.
      Timing
      Consistent daily timing recommended; split larger doses if GI tolerance is a concern.
      With food?
      With a meal containing fat for fat-soluble compounds; otherwise either.

      Where to buy

      Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.

      Scientific evidence8Show studies
      RCTAnn Intern Med · 2007

      Genistein for bone

      Marini H, et al.

      389 women

      Key findings

      Increased BMD vs placebo over 2 years.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — Reduces bone loss

      Live PubMed search

      Live results for "Genistein Reduces bone loss" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "Reduces bone loss". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — randomized controlled trial

      Live PubMed search

      Live results for "Genistein randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — meta-analysis

      Live PubMed search

      Live results for "Genistein meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — pharmacokinetics

      Live PubMed search

      Live results for "Genistein pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — safety adverse events

      Live PubMed search

      Live results for "Genistein safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Genistein — dose response

      Live PubMed search

      Live results for "Genistein dose response" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Genistein and "dose response". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewGoogle Scholar · 1970

      Google Scholar: Genistein — clinical evidence

      Live Scholar search

      Cross-database citation index for Genistein as it relates to "clinical evidence".

      Key findings

      Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

      Open study
      Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.

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