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1.5/5 Very weak evidence

Testosterone booster evidence brief

DIM / diindolylmethane

DIM has human research in estrogen-metabolism and cancer-adjacent contexts, but that does not translate into proven testosterone, muscle-gain, or fat-loss benefits for gym users.

Hormone claims unsupported health / strength 6 linked sources Content audit 2026-05-04

Headline Finding

Human DIM trials target estrogen biomarkers or clinical contexts, not testosterone, strength, or physique outcomes.

Dose Context

Trials use specific absorption-enhanced DIM preparations and clinical populations; cruciferous-vegetable metabolites, DIM capsules, and hormone-stack blends are not equivalent.

Important Caveat

Hormone-modulation claims need careful wording, and interaction signals around tamoxifen make casual endocrine marketing a trust risk.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-04
  1. Trial Tamoxifen biomarker RCT
  2. Trial Prostate phase I trial
  3. Trial PIN randomized trial
  4. Trial Cervical dysplasia randomized trial
  5. Safety Healthy-subject PK safety RCT
  6. Review Human DIM metabolism study

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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