PlainVitamins

Pure Inositol Powder

by Source Naturals · powder · 8 ozs

  • On the market (NIH)
  • UPC 0 21078 00495 0
  • DSLD label 275356
  • Serving 0.13 to 0.25 tsp (approx. 871 mg); amounts per 0.25 tsp
  • 260 servings

Pure Inositol Powder by Source Naturals lists one ingredient: 845 mg of inositol per serving of 0.25 tsp. Its current label entered the NIH Dietary Supplement Label Database on September 22, 2022.

What is in Pure Inositol Powder?

Each row as the label prints it, per serving of 0.25 tsp. 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).

Pure Inositol Powder: Supplement Facts rows against the market (DSLD label 275356, January 2026 release)
IngredientAmount% DVAmong products listing it
Inositol845 mgInositol in Pure Inositol Powder against 4,042 products845 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.845 mg

Higher than 97% of 4,042 products listing inositol (median 30 mg).

Source: NIH ODS Dietary Supplement Label Database, label 275356 (entered September 22, 2022), 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 845 mg of inositol is higher than 97% of the 4,042 inositol products that print an amount; 139 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: 1/8 to 1/4 teaspoon daily, mixed with water or juice between meals or at bedtime.
Warnings
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, preservatives, or artificial color, flavor or fragrance.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 275356.

How many labels does Pure Inositol Powder have?

3 labels are on file under this name since June 23, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 275356 (current) Entered September 22, 2022 · on the market · 8 ozs · UPC 0 21078 00495 0
  2. Label 272758 Entered August 23, 2022 · on the market · 4 ozs · UPC 0 21078 00494 3
  3. Label 75304 Entered June 23, 2017 · off the market December 22, 2021 · 4 ozs · UPC 0 21078 00494 3

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

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?