PlainVitamins

Inositol 650 mg

by Swanson · capsule · 100 capsules

  • On the market (NIH)
  • UPC 0 87614 01874 4
  • DSLD label 337664
  • Serving 1 capsule
  • 100 servings

Inositol 650 mg by Swanson lists one ingredient: 650 mg of inositol per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on August 22, 2025.

What is in Inositol 650 mg?

Each row as the label prints it, per serving of 1 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).

Inositol 650 mg: Supplement Facts rows against the market (DSLD label 337664, January 2026 release)
IngredientAmount% DVAmong products listing it
Inositol650 mgInositol in Inositol 650 mg against 4,042 products650 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.650 mg

Higher than 96% of 4,042 products listing inositol (median 30 mg).

Source: NIH ODS Dietary Supplement Label Database, label 337664 (entered August 22, 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?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 650 mg of inositol is higher than 96% of the 4,042 inositol products that print an amount; 166 list more.

The NIH database records one serving 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 use: As a dietary supplement, take one capsule per day with water.
Warnings
Warning: For adults only. Keep out of reach of children.
Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.
Do not use if seal is broken.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 337664.

What else is on the label?

Other ingredients: Gelatin, Rice Flour, Magnesium Stearate.

How many labels does Inositol 650 mg have?

2 labels are on file under this name since February 22, 2024: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 337664 (current) Entered August 22, 2025 · on the market · 100 capsules · UPC 0 87614 01874 4
  2. Label 308630 Entered February 22, 2024 · off the market June 18, 2025 · 100 capsules · UPC 0 87614 01874 4

DSLD also links this label to: Inositol 650 mg (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 Swanson Health Products (distributor), Fargo, ND. All Swanson products.

Where next?