DIM (Diindolylmethane)
Also known as: Diindolylmethane, 3,3'-Diindolylmethane, DIM, I3C metabolite
Effective Dosage
100-300 mg daily (no confirmed dose from provided studies)
What the Science Says
DIM is a natural compound formed when you digest cruciferous vegetables like broccoli, cabbage, and Brussels sprouts. It is thought to influence how the body metabolizes estrogen, potentially shifting it toward less potent forms — which is why it's marketed for hormone balance, PMS relief, and even cancer prevention support. Most of the promising findings come from lab and animal studies; human clinical evidence is limited and inconsistent, so strong conclusions cannot yet be drawn.
What It Doesn't Do
Not proven to treat or prevent cancer in humans. Won't reliably 'detox' excess estrogen on its own. No solid evidence it builds muscle or burns fat. Not a substitute for medical hormone therapy. Eating more broccoli does not deliver the same concentrated dose found in supplements.
Evidence-Based Benefits
None of the 14 provided papers investigate DIM (diindolylmethane) as a supplement ingredient. The acronym 'DIM' in the provided papers refers to unrelated concepts such as 'difference in means' (PMID: 41543994), 'days in milk' for dairy cows (PMID: 41887522, 41746917), and the 'Department of Internal Medicine' (PMID: 41784519). No evidence-based claims about diindolylmethane can be drawn from these papers.
Weak EvidenceEffective at: No established dose
Source: auto-research
Absorption & Bioavailability
Poor to Moderate — DIM has low natural bioavailability and is often formulated with absorption enhancers (e.g., BioPerine, phospholipid complexes) to improve uptake. Standard DIM powder absorbs poorly without these aids.
Red Flags to Watch For
- No papers were available for this analysis — all claims here are based on general knowledge, not reviewed clinical trials
- DIM can affect hormone levels and may interact with medications that are metabolized by the liver (CYP450 enzymes), including hormonal contraceptives
- High doses may cause nausea, headaches, or darkened urine — often dismissed as 'detox symptoms' by marketers
- Products marketed for estrogen dominance or hormone balance are largely unregulated and often make unsupported claims
- Pregnant or breastfeeding individuals should avoid DIM due to unknown hormonal effects on fetal development
- 568 registered supplement products contain DIM, indicating heavy commercial use that far outpaces the available clinical evidence
Research Sources
- General knowledge
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06