PlainVitamins

Soy Isoflavones

by Life Extension · capsule · 30 vegetarian capsules

  • On the market (NIH)
  • UPC 7 37870 16496 8
  • DSLD label 328715
  • Serving 1 vegetable capsule
  • 30 servings

Soy Isoflavones by Life Extension lists 2 ingredients, 2 with an amount per serving of 1 vegetable capsule, such as 135 mg of NovaSoy. Its current label entered the NIH Dietary Supplement Label Database on April 24, 2025.

What is in Soy Isoflavones?

Each row as the label prints it, per serving of 1 vegetable 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 328715, January 2026 release)
IngredientAmount% DVAmong products listing it
NovaSoyas Soy Isoflavones Concentrate135 mgIsoflavones in Soy Isoflavones against 290 products135 mg per serving; the middle half of products list 25 mg to 80 mg, the median 50 mg.135 mg

Higher than 89% of 290 products listing isoflavones (median 50 mg). Per day at the most servings: 270 mg.

Isoflavonesstd. to 40%54 mg

Source: NIH ODS Dietary Supplement Label Database, label 328715 (entered April 24, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). 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 2 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
Directions: Take one (1) capsule once or twice daily, or as recommended by a healthcare practitioner.
Warnings
Read the entire label and follow the directions carefully.
Warnings: Keep out of reach of children.
Do not exceed recommended dose. Do not purchase if outer seal is damaged.
Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
Contains soybeans.
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Allergens and what it does not contain
Gluten free Non GMO Le certified
Storage
Store tightly closed in a cool, dry place.

Source: label statements in DSLD label 328715.

What else is on the label?

Other ingredients: Cellulose, Ascorbyl Palmitate, Silica.

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

How many labels does Soy Isoflavones have?

One label is on file, entered on April 24, 2025.

  1. Label 328715 (current) Entered April 24, 2025 · on the market · 30 vegetarian capsules · UPC 7 37870 16496 8

DSLD also links this label to: Super Absorbable Soy Isoflavones (image difference, same product), Super Absorbable Soy Isoflavones (image difference, same product), Super Absorbable Soy Isoflavones (image difference, same product), Super Absorbable 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 Quality Supplements and Vitamins, Inc. (distributor), Ft. Lauderdale, FL. All Life Extension products.

Where next?