Supplement·Interactions·Reviewed June 9, 2026
DIM interactions.
DIM has 8 documented interactions in the NutriStack database: 1 to avoid or watch closely, 6 that need timing or caution, and 1 that work synergistically. The full list, with what each pairing does, is below.
DIM at a glance.
A quick, data-grounded summary. The full table is below.
DIM has 8 documented interactions in the NutriStack database: 1 to avoid or watch closely, 6 that need timing or caution, and 1 that work synergistically. The full list, with what each pairing does, is below.
Everything that interacts with dim.
Every supplement and medication in the NutriStack database with a documented interaction with this substance, highest-severity first. Open any pair for the mechanism and sources.
| Substance | Interaction | What happens |
|---|---|---|
| Tamoxifen | Conflict | DIM decreases endoxifen (tamoxifen's active metabolite) levels through CYP enzyme induction, potentially reducing tamoxifen's cancer-preventive... |
| DHEA | Caution | DHEA and DIM are frequently co-stacked for hormone balance, and the rationale is real: DHEA can raise androgen and estrogen levels (especially at... |
| Estradiol | Caution | DIM shifts estrogen metabolism toward 2-hydroxy metabolites (less potent), potentially reducing estradiol's effectiveness for menopausal symptom... |
| Levothyroxine | Caution | DIM (diindolylmethane) may affect thyroid hormone metabolism by inducing phase II conjugation enzymes. It can alter the estrogen-thyroid axis... |
| Melatonin | Caution | DIM is a documented CYP1A2 inducer (shown in cultured human liver slices via the AhR pathway), and melatonin is primarily metabolized by CYP1A2.... |
| Milk Thistle | Caution | DIM shifts estrogen metabolism toward 2-hydroxylation by inducing CYP1A enzymes, while milk thistle silymarin can mildly inhibit some CYP and... |
| Testosterone | Caution | DIM (diindolylmethane) modifies estrogen metabolism by activating CYP1A1 and CYP1A2 enzymes, shifting estrogen metabolism toward the... |
| Sulforaphane | Synergy | Both are cruciferous-derived compounds that favorably shift estrogen metabolism and induce phase I and phase II detoxification, giving complementary... |
The full dim profile.
Benefits, dosing by goal, forms, and the cited evidence for this supplement.
Common dim questions.
Quick answers drawn from the table above.
What interacts with DIM?
In the NutriStack database, DIM has 8 documented interactions with other supplements and medications. The most notable include Tamoxifen, DHEA, Estradiol, Levothyroxine, and Melatonin.
What should you not take with DIM?
DIM is flagged against 1 substance in the database, including Tamoxifen. Review these with a clinician before combining, especially alongside prescription medications.
What works well with DIM?
DIM pairs synergistically with Sulforaphane in the NutriStack database. Synergy still depends on dose and timing; open any pair for the detail.
Can you take DIM with Tamoxifen?
NutriStack classifies the DIM and Tamoxifen pairing as conflict: DIM decreases endoxifen (tamoxifen's active metabolite) levels through CYP enzyme induction, potentially reducing tamoxifen's cancer-preventive benefit. Do NOT combine without oncologist approval. DIM may reduce tamoxifen effectiveness.
Check your whole stack
See how dim fits your routine.
NutriStack screens your full stack for interactions and timing conflicts, and updates the moment you change it.