Diindolylmethane (DIM) for Menopause
There is no clinical evidence that diindolylmethane (DIM) relieves menopause symptoms such as hot flashes, night sweats, sleep problems, or mood changes. Every human study to date measured only urinary estrogen-metabolite ratios, not actual symptoms, so DIM cannot be recommended for menopause.
Why this grade7-layer evidence engine
This claim is graded Unverified because not a single trial has tested whether DIM eases menopausal symptoms. All five available human studies measured only urinary estrogen metabolites in non-symptomatic groups: cohorts of women on estradiol patches (PMID 40298801, n=1458) and premenopausal women (PMID 39578798, n=19294), plus tiny BRCA-carrier or breast-cancer-survivor trials (PMID 32458980, PMID 25613194, PMID 15623462, each n<25). The two large cohorts came from the company selling the hormone test, and the 2015 BRCA trial (PMID 25613194) failed its primary endpoint (p=0.35).
A shifted estrogen-metabolite ratio is an unvalidated biomarker, not proof of symptom relief. Worse, the 2025 study (PMID 40298801) found DIM pushed patch-delivered estradiol toward the 2-hydroxylation pathway, lowering active estrogen — the opposite of what menopause treatment aims for, suggesting DIM could blunt hormone therapy.
Authorities reinforce the caution. Mayo Clinic, citing 2023 menopause guidelines, states "no supplements had been proved effective" for hot flashes, and a relevant specialty society stance is against. The EU classifies purified DIM as an unauthorized Novel Food (not legally sold as a supplement), and even Health Canada — which permits DIM only for estrogen-metabolism balance — lists hot flashes, night sweats, and vaginal dryness as reasons to consult a doctor before use. A drug-interaction flag (notably tamoxifen) adds further reason for caution.
Scoring transparency
All scores computed by a 7-layer evidence engine — fully auditable▸View the full decision path (audit trail)
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.393
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 無高階證據可裁決
- tier_strict_requirement_check — D 級條件未達 (需 E1-E3 negative；實際 E6)
- detect_disputes — 偵測到 0 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status