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Dietary supplement

Diindolylmethane (DIM) Ingredients & Drug Interactions

by PureBulk.com

Diindolylmethane (DIM) label
See full label image
Powder Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Diindolylmethane (DIM) 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 (DIM) is a dietary supplement by PureBulk.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.

Jump to a section

Check Your Meds Against Diindolylmethane (DIM) by PureBulk.com

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

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HelloPharmacist Scorecard of Diindolylmethane (DIM) by PureBulk.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.

This product contains one active ingredient: diindolylmethane (DIM), a compound derived from cruciferous vegetables like broccoli and cabbage. DIM is marketed for conditions including benign prostate enlargement, breast concerns, and various cancers, though we'll cover what the evidence actually shows.

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 for DIM isn't established in the data we hold. For benign prostate enlargement, breast cancer, colorectal cancer, cervical dysplasia, and breast pain, the research is rated as insufficient to know whether it works.

If you're considering DIM for one of these reasons, talk it over with your doctor about what the current science supports.

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.

DIM is generally well tolerated in short-term studies, but long-term safety isn't well established. 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 ischemic stroke was reported in a patient taking 200 mg daily, though that patient had multiple risk factors for stroke and was taking several other supplements, so DIM's role is unclear.

For pregnancy, the safety data shows DIM is likely safe. For breastfeeding, there isn't enough safety information available — the data advises against use while nursing.

Talk with your doctor or pharmacist about whether DIM is appropriate for your personal situation.

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 you take DIM, double-check with your doctor or pharmacist if you're on estrogen therapy, birth control, or hormone replacement therapy (Moderate concern). Also flag any sodium-depleting water pills like furosemide or hydrochlorothiazide.

If you take medications processed through the liver enzyme CYP1A2, those warrant a quick review too, though this interaction is a Minor concern and hasn't been seen in people yet.

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.

DIM is a single-ingredient supplement generally well tolerated short-term, but it does interact with estrogens, water pills, and some liver-metabolized medications — and long-term safety isn't proven. If you take hormone therapy, a diuretic, or any prescription medication, check your exact drugs with the tool on this page before starting.

Have that conversation with your doctor or pharmacist, especially if you're pregnant, nursing, or considering it for a specific health condition.

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 Jun 25, 2013.

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 (DIM), straight from the product label.

Brand PureBulk.com
Net contents 10 g; 0.35 oz.
Market status On market
Date entered into DSLD Jun 25, 2013
DSLD ID 23079
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 (DIM) by PureBulk.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:
100 mg
Maximum serving Sizes:
200 mg
Servings per container
50
IngredientAmount% DV
Diindolylmethane200 mg--

Other ingredients: None

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.
Storage

For best results, refrigerate upon arrival. Storage: Keep dry, cool & dark

Formulation

Free of: Sugar, soy, dairy, yeast, gluten, corn and additives.

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement, take 100 mg (1/16 tsp) to 200 mg (1/8 tsp) once or twice daily, or as directed by physician.

General Statements

US Standard Measuring Spoons Spoon Size (level) milligrams 1/32 teaspoon 57 1/16 teaspoon 114 1/8 teaspoon 229

Precautions

Warning: This product is not intended for use by those with a serious medical condition or pregnant or lactating women.

Consult with your physician before use.

Keep out of reach of children.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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

See for yourself

Diindolylmethane (DIM) by PureBulk.com label

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

Diindolylmethane (DIM) 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 (DIM) by PureBulk.com

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

Serving size100 mg Dosage formPowder Servings per container50 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

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Diindolylmethane (DIM) by PureBulk.com Drug Interactions

Want to check YOUR meds against Diindolylmethane (DIM)?

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 (DIM) interact with 269 drugs. Click any drug to see the details.

1 of the 1 ingredient in Diindolylmethane (DIM) 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 (DIM) 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 (DIM), from the product label.

PureBulk.com

See all PureBulk.com products
Name
PureBulk.com
City
Roseburg
State
OR
ZipCode
97471
Phone Number
(541) 679-1500
Web Address
PureBulk.com
Pharmacist Counseling Corner

Diindolylmethane (DIM) by PureBulk.com: Common Questions

Does Diindolylmethane (DIM) by PureBulk.com interact with any medications?
Yes. Based on its ingredients, Diindolylmethane (DIM) 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 (DIM) 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 DIM safe during pregnancy?
According to the safety data on file, DIM is likely safe in pregnancy. That said, any supplement decision in pregnancy is worth discussing with your doctor or midwife to make sure it fits your individual situation.
Can I take DIM while breastfeeding?
There isn't enough safety information to know either way. The data advises against use while nursing. Talk with your doctor or pharmacist about whether DIM is right for you if you're breastfeeding.
Does DIM actually work for prostate health or cancer prevention?
The evidence for DIM isn't established in the data we hold. For benign prostate enlargement, breast cancer, colorectal cancer, cervical dysplasia, and breast pain, the research is rated as insufficient to say whether it works. Your doctor can discuss what the latest science supports.
What side effects should I watch for?
Most people tolerate DIM well. The common side effects are diarrhea, gas, headache, nausea, rash, and vomiting. A rare serious skin reaction called DRESS has been reported. Stop and contact your doctor if you develop a rash with fever or swollen lymph nodes.
Is this just broccoli powder?
No. DIM is a compound that forms when your body digests cruciferous vegetables like broccoli, but this supplement is a concentrated extract — not the same as eating the vegetables themselves.
How long is it safe to take DIM?
DIM is generally well tolerated in short-term studies, but long-term safety isn't well established. If you're thinking of taking it regularly, check with your doctor or pharmacist about the right timeframe for your situation.

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 (DIM) label
Go deeper

The Full Monographs Behind Diindolylmethane (DIM)’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 (DIM)'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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