Soy Isoflavones

by NOW · capsule · 120 veg capsules

  • On the market (NIH)
  • UPC 7 33739 03288 1
  • DSLD label 57317
  • Serving 1 veg capsule

Soy Isoflavones by NOW lists one ingredient: 150 mg of non-GMO soy isoflavone powder per serving of 1 veg capsule. Its current label entered the NIH Dietary Supplement Label Database on March 24, 2016.

What is in Soy Isoflavones?

Each row as the label prints it, per serving of 1 veg capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Soy Isoflavones: Supplement Facts rows against the market (DSLD label 57317, January 2026 release)
IngredientAmount% DVAmong products listing it
non-GMO Soy Isoflavone powderas Glycine max, total Isoflavonesnon-GMO Soy Isoflavone powder (Form: Glycine max PlantPart: seed Genus: Glycine Species: max, min. 40% total Isoflavones (Form: including Genistein, Daidzein, and Glycitein) Note: 60 mg)150 mgIsoflavones in Soy Isoflavones against 290 products150 mg per serving; the middle half of products list 25 mg to 80 mg, the median 50 mg.150 mg

Higher than 89% of 290 products listing isoflavones (median 50 mg). Per day at the most servings: 450 mg.

Source: NIH ODS Dietary Supplement Label Database, label 57317 (entered March 24, 2016), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records 1 to 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

6 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Suggested Usage: Take 1 capsule 1 to 3 times daily.
Warnings
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Not manufactured with wheat, gluten, corn, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Allergens and what it does not contain
Not manufactured with wheat, gluten, corn, milk, egg, fish, shellfish or tree nut ingredients.
Storage
Store in a cool, dry place after opening.

Source: label statements in DSLD label 57317.

What else is on the label?

Other ingredients: Rice Flour, Cellulose, Silica, Magnesium Stearate.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non-GMO; GMP QUALITY ASSURED.

How many labels does Soy Isoflavones have?

2 labels are on file under this name since March 24, 2016: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 57317 (current) Entered March 24, 2016 · on the market · 120 veg capsules · UPC 7 33739 03288 1
  2. Label 57316 Entered March 24, 2016 · on the market · 60 veg capsules · UPC 7 33739 03287 4

DSLD also links this label to: Extra Strength Soy Isoflavones (package size difference, same product), Extra Strength Soy Isoflavones (image difference, same product).

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names NOW Foods (manufacturer), Bloomingdale, IL. All NOW products.

Where next?