PlainVitamins

non-nutrient/non-botanical

Isoflavones supplements

Half of the 290 isoflavones supplements in the NIH label database that print an amount list 50 mg or less per serving; the middle half list 25 mg to 80 mg (DSLD version 9.4.0, January 2026). The 24 products whose only supplement ingredient is isoflavones list a median of 117.5 mg.

Products listing it
328290 print an amount; 38 list it inside a blend without an amount
Median per serving
50 mgmiddle half 25 mg to 80 mg

How much isoflavones do supplements contain?

The median product lists 50 mg per serving. One in ten lists 10 mg or less, one in ten 150 mg or more. The amount printed most often is 50 mg (33 products).

Products by amount of isoflavones per serving

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

Isoflavones: products by amount per serving0.1 mg1 mg10 mg100 mg
Isoflavones: products by amount per serving0.03 mg0.3 mg3 mg30 mg300 mg
Isoflavones: products by amount per serving0.03 mg0.3 mg1 mg3 mg10 mg100 mg1,000 mg
Isoflavones: products by amount per serving0.03 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
Isoflavones: products by amount per serving0.03 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
50 mg33 Calcium 600 mg (Vitamin World); Multi Vitamin With Black Cohosh & Soy Isoflavones (Windmill); Soy Menopause Supplement (Nature Made)
30 mg28 Women's Support (Vitabase); Ortho Multi For Women (Protocol For Life Balance); Clinical Antiangiogenesis (Natural Clinician)
25 mg22 Soy-Futura (HerbaSway); Menopause Support (Pathway To Healing); Active Woman's Multi (Vitabase)
80 mg21 Don't Pause For Women (ANTIAGING Institute of California); Extra Strength Estroven (Estroven); Concentrated Soy Isoflavones (Sundown Naturals)
20 mg15 Clinical Prostate Suppport (Natural Clinician); Menapol Plus (SimplySupplements); DHT Blocker For Men & Women (Natrol NuHair)
40 mg14 Bone Support With Ostivone (Twinlab); Red Clover/Black Cohosh 225 mg / 40 mg (NOW); Promensil (Natrol)
100 mg13 Ultra-Menoease (Douglas Laboratories); Phytosoya (Douglas Laboratories); HerbalNutrition NovaSoy (The Professional Series)
56 mg12 Healthy Metabolism & Weight Management (Estroven); Energy (Estroven); Menopause Relief + Sleep (Estroven)
60 mg11 Nighttime (Estroven); Prostate Health Complex (Nutrients for Health); Maximum Strength + Energy (Estroven)
5 mg8 Women's Multiple (Radiance Select); Mega Vita Min For Women (Radiance); The Essential Woman (Barlean's)

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 isoflavones?

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).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 50 mg; those entered in 2025, 50 mg.

Median isoflavones per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
20122550 mg
20132350 mg
20202239 mg
20212940 mg
20222740 mg
20233050 mg
20242027.5 mg
20252050 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing isoflavones by DSLD product type

Isoflavones by product typeOther Combinations225Non-Nutrient/Non-Botanical26Botanical with Nutrients18Botanical17Fat/Fatty Acid2Amino acid/Protein1Fiber and Other Nutrients1
Isoflavones by product typeOther Combinations225Non-Nutrient/Non-Botanical26Botanical with Nutrients18Botanical17Fat/Fatty Acid2Amino acid/Protein1Fiber and Other Nutrients1
Isoflavones by product typeOther Combinations225Non-Nutrient/Non-Botanical26Botanical with Nutrients18Botanical17Fat/Fatty Acid2Amino acid/Protein1Fiber and Other Nutrients1
Isoflavones by product typeOther Combinations225Non-Nutrient/Non-Botanical26Botanical with Nutrients18Botanical17Fat/Fatty Acid2Amino acid/Protein1Fiber and Other Nutrients1
Isoflavones by product typeOther Combinations225Non-Nutrient/Non-Botanical26Botanical with Nutrients18Botanical17Fat/Fatty Acid2Amino acid/Protein1Fiber and Other Nutrients1

Brands listing it most: Estroven (17), Source Naturals (12), Metagenics (6), 21st Century (6), Solgar (5), NaturesPlus (5), Natrol (5), Douglas Laboratories (5), Wonder Laboratories (4), Barlean's (4).

Every product listing isoflavones

328 products, A to Z by name (page 2 of 7), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?