PlainVitamins

non-nutrient/non-botanical

Indole-3-Carbinol (I3C) supplements

Half of the 100 indole-3-carbinol (I3C) supplements in the NIH label database that print an amount list 150 mg or less per serving; the middle half list 75 mg to 200 mg (DSLD version 9.4.0, January 2026).

Products listing it
167100 print an amount; 67 list it inside a blend without an amount
Median per serving
150 mgmiddle half 75 mg to 200 mg

How much indole-3-carbinol (I3C) do supplements contain?

The median product lists 150 mg per serving. One in ten lists 25 mg or less, one in ten 200 mg or more. The amount printed most often is 200 mg (31 products).

Products by amount of indole-3-carbinol (I3C) per serving

100 products, log scale; extreme 0.2% at each end left out of the drawing.

Indole-3-Carbinol (I3C): products by amount per serving3 mg10 mg30 mg100 mg300 mg
Indole-3-Carbinol (I3C): products by amount per serving3 mg10 mg30 mg100 mg300 mg
Indole-3-Carbinol (I3C): products by amount per serving3 mg10 mg30 mg100 mg300 mg
Indole-3-Carbinol (I3C): products by amount per serving3 mg10 mg30 mg100 mg300 mg
Indole-3-Carbinol (I3C): products by amount per serving3 mg10 mg30 mg100 mg300 mg
The amounts printed most often
Amount per servingProductsFor example
200 mg31 Ultra Indinol Plus (Douglas Laboratories); I3C Indole 3-Carbinol 200 (LifeLink); Indole-3-Carbinol (MyTrition)
150 mg12 Gamma-O (Gamma Labs); EstroSense (Natural Factors WS WomenSense); AndroSense T-Correct (Natural Factors)
100 mg11 E I-3-C (Indole-3-Carbinol) (AFI America's Finest); Vital Immunity (PL Progressive Laboratories); AndroBoost (Nutrients for Health)
60 mg6 I3C Plus (Health Products Distributors)
1 mg5 Hormone Health Blend (GNC Mega Men); Re-Test (GNC Beyond Raw); Healthy Testosterone (GNC Men's)
75 mg5 Estrogen Blocker (Iron Brothers Supplements); Bone & Body Factors (ProCaps Laboratories); Vital Immunity (Progressive Professional from Progressive Laboratories)
50 mg4 Estrovite (K-5) (Apex Energetics); Estrohalt (Addrena); DIM Estro Clean Complex (Body Dynamics MaXzorbceuticals Nutrition)
80 mg3 Triple Action Cruciferous Vegetable Extract (Life Extension); Triple Action Cruciferous Vegetable Extract and Resveratrol (Life Extension)
99 mg3 Test 1700 (GNC AMP); Test 1700 (GNC AMP Advanced Muscle Performance)
300 mg3 Hard Target (Apollon Nutrition); I3c Sap (NFH); I3c + DIM (Wellness Resources)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most indole-3-carbinol (I3C)?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

In which products and brands?

Products listing indole-3-carbinol (I3C) by DSLD product type

Indole-3-Carbinol (I3C) by product typeOther Combinations82Non-Nutrient/Non-Botanical17Botanical with Nutrients1
Indole-3-Carbinol (I3C) by product typeOther Combinations82Non-Nutrient/Non-Botanical17Botanical with Nutrients1
Indole-3-Carbinol (I3C) by product typeOther Combinations82Non-Nutrient/Non-Botanical17Botanical with Nutrients1
Indole-3-Carbinol (I3C) by product typeOther Combinations82Non-Nutrient/Non-Botanical17Botanical with Nutrients1
Indole-3-Carbinol (I3C) by product typeOther Combinations82Non-Nutrient/Non-Botanical17Botanical with Nutrients1

Brands listing it most: Axxcelerated Sports Nutrition (4), Life Extension (4), Natural Factors (3), ProCaps Laboratories (3), Douglas Laboratories (3), GNC Mega Men (2), GNC Men's (2), Progressive Professional from Progressive Laboratories (2), Genestra Brands (2), XLSN Xcel Sports Nutrition (2).

Every product listing indole-3-carbinol (I3C)

167 products, A to Z by name (page 3 of 4), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

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