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Dietary supplement

Diindolylmethane Ingredients & Drug Interactions

by BulkSupplements.com

Diindolylmethane label
See full label image
Powder Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Diindolylmethane against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Diindolylmethane is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for estrogen/hormone balance, acne and hormonal skin issues, prostate health support.Based on those ingredients, 269 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Diindolylmethane. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Diindolylmethane by BulkSupplements.com

Ask about any prescription or over-the-counter medication and we check it for interactions with Diindolylmethane by BulkSupplements.com — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Diindolylmethane by BulkSupplements.com

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 23, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Diindolylmethane is a single active ingredient — a compound found naturally in cruciferous vegetables like broccoli and cabbage. This product contains no inactive ingredients or fillers.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Diindolylmethane product and its label doesn't state a use — see Diindolylmethane's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we have for diindolylmethane isn't established. Studies to date provide insufficient reliable evidence to rate it for benign prostate enlargement, breast cancer, colorectal cancer, cervical cell changes, or breast pain.

If you're thinking about it for one of these reasons, talk it over with your doctor about whether the current data supports a try.

The evidence, ingredient by ingredient Diindolylmethane

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Diindolylmethane is generally well tolerated in short-term use, but long-term safety isn't well established — we don't have enough data on what happens if you take it for months or years. The most common side effects are diarrhea, gas, headache, nausea, rash, and vomiting.

A rare serious reaction called DRESS (drug rash with eosinophilia and systemic symptoms) has been reported. One case of stroke was documented in a woman taking diindolylmethane alongside other supplements, though she had multiple stroke risk factors and it's unclear whether diindolylmethane played a role.

Because of its possible effects on hormones, the safety data advises against use in pregnancy. We don't have reliable safety information for breastfeeding, so it's best avoided while nursing.

The product itself carries insufficient data on hormonal effects and long-term use, so if you're pregnant, breastfeeding, or considering it, talk with your doctor or pharmacist first.

Side effects, ingredient by ingredient Diindolylmethane

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Diindolylmethane.
  • The most serious interaction on file is rated Moderate.
  • For scale: 269 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking this product, check with your doctor or pharmacist if you take estrogens or hormone replacement therapy — diindolylmethane might change how well they work. Also verify any sodium-depleting diuretics (water pills) you're on, as large doses of diindolylmethane have been linked to low sodium in rare cases.

If you take medications processed through the liver enzyme CYP1A2, a pharmacist can help confirm whether this supplement might lower their levels.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Diindolylmethane is generally well tolerated short-term but lacks strong evidence for the conditions it's marketed for and has potential interactions with hormones and certain medications. If you take estrogen-based birth control, hormone replacement therapy, diuretics, or drugs processed through CYP1A2, you'll want to review your specific medications with your doctor or pharmacist before starting.

Those who are pregnant, breastfeeding, or have long-term plans for this supplement should discuss it with their healthcare provider.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Apr 23, 2024.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Diindolylmethane, straight from the product label.

Brand BulkSupplements.com
Barcode (UPC) X0010350U7
Net contents 100 Gram(s); 3.5 Ounce(s)
Market status On market
Date entered into DSLD Apr 23, 2024
DSLD ID 311513
Product type Non-nutrient/non-botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Diindolylmethane by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
200 mg
Maximum serving Sizes:
200 mg
Servings per container
500
UPC/BARCODE
X0010350U7
IngredientAmount% DV
Diindolylmethane200 mg--

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Brand IP Statement(s)

BulkSupplements.com Clean & Pure Bulk Supplements

FDA Disclaimer Statement

Warning: This product is not intended to diagnose, cure, or prevent any disease.

Precautions

Always consult a physician before taking any dietary supplement.

Keep out of reach of children.

Formulation

Free of: Sugar, soy, dairy, yeast, gluten, additives

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 200 mg (about 1/10 tsp) one to two times daily, or a directed by a physician.

Storage

Store in a dry, cool, dark place.

Formula

Diindolylmethane (DIM) Powder

General Statements

Use an accurate milligram scale. Contents are sold by weight, not volume. Settling may occur. New

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Diindolylmethane by BulkSupplements.com label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Diindolylmethane label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Diindolylmethane by BulkSupplements.com

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size200 mg Dosage formPowder Servings per container500 Amounts shown are per serving.

Diindolylmethane

Interacts with
269 drugs
200 mg per serving

Diindolylmethane (DIM) is a compound made when your body digests cruciferous vegetables, and it is sold as a supplement mainly for hormone balance and...

Diindolylmethane monograph & interactions
Interaction report

Diindolylmethane by BulkSupplements.com Drug Interactions

Want to check YOUR meds against Diindolylmethane?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
269Drugs
116 Moderate 153 Minor

Ingredients driving the most interactions

Diindolylmethane 269

Individual Drug Interactions

The ingredients in Diindolylmethane interact with 269 drugs. Click any drug to see the details.

1 of the 1 ingredient in Diindolylmethane interact with drugs. Each result below shows which ingredient is responsible. Diindolylmethane

Each ingredient & the kinds of drugs it affects

For each ingredient in Diindolylmethane with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Diindolylmethane3 drug types · 269 drugs

Diuretic Drugs

Theoretically, diindolylmethane might increase the risk of hyponatremia if used with sodium-depleting diuretics.
Large doses of diindolylmethane (600 mg daily) have been associated with two cases of asymptomatic hyponatremia in clinical research.

Likelihood Possible Evidence B
Estrogens

Theoretically, diindolylmethane might increase or decrease the effects of estrogens.
Diindolylmethane might have mild estrogenic or antiestrogenic effects. Theoretically, large amounts of diindolylmethane might interfere with hormone replacement therapy.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, diindolylmethane might lower serum levels of CYP1A2 substrates.
In vitro evidence suggests that diindolylmethane can induce CYP1A2. Theoretically, it might increase metabolism of CYP1A2 substrates and lower serum concentrations. This interaction has not been reported in humans.

Likelihood Unlikely Evidence D
Diindolylmethane full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Diindolylmethane, from the product label.

BulkSupplements.com

See all BulkSupplements.com products
Name
BulkSupplements.com
Street Address
7511 Eastgate Rd
City
Henderson
State
NV
ZipCode
89011
Web Address
bulksupplements.com
Pharmacist Counseling Corner

Diindolylmethane by BulkSupplements.com: Common Questions

Does Diindolylmethane by BulkSupplements.com interact with any medications?
Yes. Based on its ingredients, Diindolylmethane has a known interaction with 269 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Diindolylmethane contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is diindolylmethane safe to take while pregnant?
The safety rating in our data is "Likely Safe" for pregnancy, so it's not flagged as unsafe. That said, the product carries a caution that long-term safety is not well established, and there's a note that possible effects on hormones warrant discussion with your doctor. Since pregnancy is a time when hormone balance matters, it's best to talk this over with your own doctor or midwife before starting.
What are the most common side effects?
The most common side effects are diarrhea, gas, headache, nausea, rash, and vomiting. These generally happen when taken by mouth, and most people tolerate it well in short-term use.
Does diindolylmethane actually work for breast cancer or prostate problems?
We don't have enough reliable evidence to say. For breast cancer, colorectal cancer, prostate enlargement, cervical cell changes, and breast pain, the evidence is currently insufficient to rate whether it works. If you're considering it for one of these conditions, talk with your doctor about the strength of the current research.
Can I take this while breastfeeding?
No reliable safety information is available for breastfeeding, so it's best avoided. Discuss this with your doctor or pharmacist if you'd like to know more about the gaps in the data.
What is diindolylmethane and where does it come from?
Diindolylmethane (or DIM) is a compound found naturally in cruciferous vegetables like broccoli, cabbage, and cauliflower. This supplement is a concentrated form of that compound.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Diindolylmethane label
Go deeper

The Full Monographs Behind Diindolylmethane’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Diindolylmethane

Interacts with 269 drugs

Diindolylmethane (DIM) is a compound made when your body digests cruciferous vegetables, and it is sold as a supplement mainly for hormone balance and cancer prevention. Although early lab s...

Read the full Diindolylmethane monograph →
Sources

Sources & How We Checked

Diindolylmethane's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 14 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Diindolylmethane 14 references
  1. Natl Inst Health, Natl Inst Environmental Health Sci. Indole-3-carbinol. Available at: http://ntp-server.niehs.nih.gov.
  2. Balk JL. Indole-3-carbinol for cancer prevention. Altern Med Alert 2000; 3:105-7.
  3. Riby JE, Chang GHF, Firestone GL, Bjeldanes LF. Ligand-independent activation of estrogen receptor function by 3,3'-diindolylmethane in human breast cancer cells. Biochem Pharmacol 2000;60:167-77. PubMed
  4. Lake BG, Tredger JM, Renwick AB, et al. 3'3-diindolylmethane induces CYP1A2 in cultured precision-cut human liver slices. Xenobiotica 1998;28:803-11. PubMed
  5. Dalessandri, K. M., Firestone, G. L., Fitch, M. D., Bradlow, H. L., and Bjeldanes, L. F. Pilot study: effect of 3,3'-diindolylmethane supplements on urinary hormone metabolites in postmenopausal women with a history of early-stage breast cancer. Nutr Canc PubMed
  6. Reed, G. A., Arneson, D. W., Putnam, W. C., Smith, H. J., Gray, J. C., Sullivan, D. K., Mayo, M. S., Crowell, J. A., and Hurwitz, A. Single-dose and multiple-dose administration of indole-3-carbinol to women: pharmacokinetics based on 3,3'-diindolylmetha
  7. Reed, G. A., Sunega, J. M., Sullivan, D. K., Gray, J. C., Mayo, M. S., Crowell, J. A., and Hurwitz, A. Single-dose pharmacokinetics and tolerability of absorption-enhanced 3,3'-diindolylmethane in healthy subjects. Cancer Epidemiol.Biomarkers Prev. 2008; PubMed
  8. Del Priore G., Gudipudi, D. K., Montemarano, N., Restivo, A. M., Malanowska-Stega, J., and Arslan, A. A. Oral diindolylmethane (DIM): pilot evaluation of a nonsurgical treatment for cervical dysplasia. Gynecol.Oncol. 2010;116(3):464-467. PubMed
  9. Heath, E. I., Heilbrun, L. K., Li, J., Vaishampayan, U., Harper, F., Pemberton, P., and Sarkar, F. H. A phase I dose-escalation study of oral BR-DIM (BioResponse 3,3'- Diindolylmethane) in castrate-resistant, non-metastatic prostate cancer. Am.J.Transl.R
  10. Jellinck, P. H., Forkert, P. G., Riddick, D. S., Okey, A. B., Michnovicz, J. J., and Bradlow, H. L. Ah receptor binding properties of indole carbinols and induction of hepatic estradiol hydroxylation. Biochem.Pharmacol. 3-9-1993;45(5):1129-1136. PubMed
  11. Bui PV, Moualla M, Upson DJ. A Possible Association of Diindolylmethane with Pulmonary Embolism and Deep Venous Thrombosis. Case Rep Med. 2016;2016:7527098. PubMed
  12. Castañon A, Tristram A, Mesher D, Powell N, Beer H, Ashman S, Rieck G, Fielder H, Fiander A, Sasieni P. Effect of diindolylmethane supplementation on low-grade cervical cytological abnormalities: double-blind, randomised, controlled trial. Br J Cancer. 20 PubMed
  13. Le TM, Sanders CJ, van de Corput L, van Erpecum KJ, Röckmann H. Drug rash with eosinophilia and systemic symptoms caused by the dietary supplement diindolylmethane. J Allergy Clin Immunol Pract. 2016 Jan-Feb;4(1):175-6. PubMed
  14. Pence ST, Mehta K, Crum-Bailey J. The Serious Side of Supplements: An Ischemic Stroke in a Healthy 38-year-old Female. Mil Med 2022. PubMed

See these in context on the Diindolylmethane monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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