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Dietary supplement

I3C + DIM Ingredients & Drug Interactions

by Wellness Resources

I3C + DIM label
See full label image
Capsule 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 I3C + 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

I3C + DIM is a dietary supplement by Wellness Resources with 2 active ingredients. Its ingredients are commonly taken for estrogen/hormone balance, acne and hormonal skin issues, prostate health support.Based on those ingredients, 365 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Indole-3-Carbinol, 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 I3C + DIM by Wellness Resources

Ask about any prescription or over-the-counter medication and we check it for interactions with I3C + DIM by Wellness Resources — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of I3C + DIM by Wellness Resources

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 11, 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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains 2 active ingredients: diindolylmethane and indole-3-carbinol. Both are plant compounds derived from cruciferous vegetables like broccoli and cabbage.

The capsules also contain cellulose and rice hull as inactive ingredients.

Does it work?

Not established
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 established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use.

Why this rating?
  • The label markets this product for: estrogen metabolism and balance support.
  • We looked for evidence on: Benign prostatic hyperplasia (BPH), Breast cancer, Cervical dysplasia, Mastalgia, Premenstrual syndrome (PMS), Prostate cancer — and 3 related terms.
  • The closest evidence on file: Indole-3-carbinol is rated "Insufficient Reliable Evidence To Rate" for Breast cancer (Natural Medicines).
  • Also on file: Indole-3-carbinol is rated "Insufficient Reliable Evidence To Rate" for Cervical dysplasia.
  • Also on file: Diindolylmethane is rated "Insufficient Reliable Evidence To Rate" for Benign prostatic hyperplasia (BPH), Breast cancer, Cervical dysplasia, Mastalgia, and more.

The evidence we hold does not establish that either ingredient is effective for any of the conditions they're marketed for — including breast cancer, colorectal cancer, cervical dysplasia, benign prostatic hyperplasia, breast tenderness (mastalgia), fibromyalgia, or liver disease. All effectiveness ratings for these uses are insufficient reliable evidence to rate.

The evidence, ingredient by ingredient Diindolylmethane Indole-3-carbinol

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • 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 studies, but long-term safety is not well established. Common side effects include 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 occurred in a patient taking diindolylmethane alongside other supplements, though causation is unclear.

Indole-3-carbinol is generally well tolerated from food sources, but supplement doses are less studied. Common side effects are diarrhea, nausea, rash, and imbalance or tremor — especially at higher doses.

Safety data during pregnancy is insufficient; the facts provide no recommendation. Because of possible hormone effects and limited safety data, concentrated supplements should be avoided during breastfeeding.

Side effects, ingredient by ingredient Diindolylmethane Indole-3-carbinol

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?
  • 2 of the 2 matched ingredients can interact with medications — Indole-3-carbinol, Diindolylmethane.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 365 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, double-check with your pharmacist if you use blood thinners or antiplatelet drugs (Moderate risk of increased bleeding), estrogens or hormone replacement therapy (Moderate risk of reduced or increased hormone effect), sodium-depleting water pills (Moderate risk of low blood sodium), or medications metabolized by the CYP1A2 liver enzyme pathway (Moderate to Minor risk of reduced drug levels).

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

This product pairs two plant compounds without established effectiveness for their marketed uses. If you take blood thinners, hormone therapy, or water pills, you'll want to check with us before starting — the interaction potential is real.

Pregnancy use appears to have limited safety data; breastfeeding is not recommended due to hormone concerns.

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

Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 23, 2025.

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 I3C + DIM, straight from the product label.

Brand Wellness Resources
Net contents 60 Capsule(s)
Market status On market
Date entered into DSLD Feb 23, 2025
DSLD ID 320626
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 I3C + DIM by Wellness Resources, 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:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
60
IngredientAmount% DV
Diindolylmethane100 mg--
Indole-3-Carbinol300 mg--

Other ingredients: Cellulose, Rice hull

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.
Formula

I3C + DIM contains cruciferous vegetable extracts that support healthy estrogen metabolism and balance, in both women and men.

FDA Disclaimer Statement

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

Suggested/Recommended/Usage/Directions

Directions: Take 1 capsule, 1 to 2 times per day.

Brand IP Statement(s)

Wellness Resources since 1985

Formulation

Estrogen metabolism support

FDA Statement of Identity

Dietary Supplement

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

See for yourself

I3C + DIM by Wellness Resources label

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

I3C + 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 I3C + DIM by Wellness Resources

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Diindolylmethane

Interacts with
269 drugs
100 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

Indole-3-Carbinol

Interacts with
294 drugs
300 mg per serving Form: Brassica oleracea

Indole-3-carbinol (I3C) is a compound formed when you eat cruciferous vegetables like broccoli and cabbage, and it is sold as a supplement mainly for...

Indole-3-Carbinol monograph & interactions

Other (inactive) ingredients: Cellulose, Rice hull. These complete the product’s ingredient list but are not active constituents.

Interaction report

I3C + DIM by Wellness Resources Drug Interactions

Want to check YOUR meds against I3C + 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
365Drugs
365 Moderate

Ingredients driving the most interactions

Indole-3-Carbinol 294
Diindolylmethane 269

Individual Drug Interactions

The ingredients in I3C + DIM interact with 365 drugs. Click any drug to see the details.

2 of the 2 ingredients in I3C + DIM interact with drugs. Each result below shows which ingredient is responsible. Indole-3-Carbinol Diindolylmethane

Each ingredient & the kinds of drugs it affects

For each ingredient in I3C + DIM with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Indole-3-Carbinol3 drug types · 294 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, indole-3-carbinol might increase the risk of bleeding when used with antiplatelet or anticoagulant drugs.
In vitro research shows that indole-3-carbinol inhibits platelet aggregation.

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

Theoretically, indole-3-carbinol might increase the metabolism of CYP1A2 substrates and lower serum concentrations.
Animal research shows that indole-3-carbinol induces CYP1A2 enzymes.

Likelihood Possible Evidence D
Estrogens

Indole-3-carbinol might interfere with the effects of estrogen therapy.
Preliminary clinical and in vitro evidence shows that indole-3-carbinol has antiestrogenic activity.

Likelihood Possible Evidence D
Indole-3-Carbinol full monograph & interactions

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 I3C + DIM, from the product label.

Wellness Resources

See all Wellness Resources products
Name
Wellness Resources, Inc.
Street Address
7155 Amundson Avenue
City
Edina
State
MN
ZipCode
55439
Phone Number
800-717-9355
Web Address
www.wellnessresources.com
Pharmacist Counseling Corner

I3C + DIM by Wellness Resources: Common Questions

Does I3C + DIM by Wellness Resources interact with any medications?
Yes. Based on its ingredients, I3C + DIM has a known interaction with 365 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
I3C + DIM contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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 it safe to take this while pregnant?
The product facts say diindolylmethane is likely safe in pregnancy, but there isn't enough information on file about indole-3-carbinol. Since this is a personal medical decision and the data is incomplete, talk to your doctor or pharmacist before using it while pregnant.
Can I breastfeed while taking this?
No — the facts advise against it. There's not enough safety data, and both ingredients may have effects on hormones. If breastfeeding is important to you, ask your pharmacist about alternatives or timing.
What are the most common side effects?
Diarrhea, nausea, headache, gas, and rash are the most frequently reported. At higher doses, indole-3-carbinol has been linked to imbalance and tremor — a dose reduction resolved these in one case.
Does this product actually work for breast cancer or other cancers?
The evidence we hold doesn't establish that it works for breast cancer, colorectal cancer, cervical dysplasia, or any other condition listed. All ratings are insufficient reliable evidence to rate.
How long is it safe to take this product?
Short-term use appears generally well tolerated, but long-term safety isn't well established. That's one reason to discuss your plans with a pharmacist before starting.

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

Not sure if I3C + DIM is safe with your meds?

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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.

I3C + DIM label
Go deeper

The Full Monographs Behind I3C + 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 → Herb & supplement monograph

Indole-3-carbinol

Interacts with 294 drugs

Indole-3-carbinol (I3C) is a compound formed when you eat cruciferous vegetables like broccoli and cabbage, and it is sold as a supplement mainly for hormone-related and cell-protective effe...

Read the full Indole-3-carbinol monograph →
Sources

Sources & How We Checked

I3C + 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 23 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 →

Indole-3-carbinol 9 references
  1. Rosen CA, Woodson GE, Thompson JW, et al. Preliminary results of the use of indole-3-carbinol for recurrent respiratory papillomatosis. Otolaryngol Head Neck Surg 1998;118:810-5. PubMed
  2. Bell MC, Crowley-Nowick P, Bradlow HL, et al. Placebo-controlled trial of indole-3-carbinol in the treatment of CIN. Gynecol Oncol 2000;78:123-9. PubMed
  3. He YH, Friesen MD, Ruch RJ, Schut HA. Indole-3-carbinol as a chemopreventive agent in 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) carcinogenesis: inhibition of PhIP-DNA adduct formation, acceleration of PhIP metabolism, and induction of cytoch
  4. Kim, Y. S. and Milner, J. A. Targets for indole-3-carbinol in cancer prevention. J.Nutr.Biochem. 2005;16(2):65-73. PubMed
  5. Anon. Indole-3-carbinol. Monograph. Alternative Medicine Review 2005;10(4):337-42.
  6. McAlindon TE, Gulin J, Chen T, et al. Indole-3-carbinol in women with SLE: effect on estrogen metabolism and disease activity. Lupus 2001;10:779-83. PubMed
  7. Reed GA, Peterson KS, Smith HJ, et al. A phase I study of indole-3-carbinol in women: tolerability and effects. Cancer Epidemiol Biomarkers Prev 2005;14:1953-60. PubMed
  8. Bradlow HL, Michnovicz JJ, Halper M, et al. Long-term responses of women to indole-3-carbinol or a high fiber diet. Cancer Epidemiol Biomarkers Prev 1994;3:591-5.
  9. Paliwal P, Chauhan G, Gautam D, Dash D, Patne SCU, Krishnamurthy S. Indole-3-carbinol improves neurobehavioral symptoms in a cerebral ischemic stroke model. Naunyn Schmiedebergs Arch Pharmacol. 2018;391(6):613-625. PubMed

See these in context on the Indole-3-carbinol 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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