PlainVitamins

FOS 1,000 mg

by Source Naturals · tablet or pill · 100 tablets

  • On the market (NIH)
  • UPC 0 21078 00575 9
  • DSLD label 274610
  • Serving 3 to 4 tablets; amounts per 4 tablets
  • 25 servings

FOS 1,000 mg by Source Naturals lists 2 ingredients, 2 with an amount per serving of 4 tablets, such as 450 mcg of iron and 4 g of fructooligosaccharides, beside 3 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on September 22, 2022.

What is in FOS 1,000 mg?

Each row as the label prints it, per serving of 4 tablets. 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).

FOS 1,000 mg: Supplement Facts rows against the market (DSLD label 274610, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories5 Calories
Total Carbohydrates5 g2%Carbohydrate in FOS 1,000 mg against 21,979 products5 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.5 g

Higher than 65% of 21,979 products listing carbohydrate (median 3 g).

Dietary Fiber4 g16%Fiber in FOS 1,000 mg against 6,987 products4 g per serving; the middle half of products list 1 g to 4 g, the median 2 g.4 g

Higher than 74% of 6,987 products listing fiber (median 2 g).

Ironnaturally occurring450 mcg3%Iron in FOS 1,000 mg against 6,910 products0.45 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg0.45 mg

91% of 6,910 products listing iron give more (median 5 mg).

Sodium25 mg1%Sodium in FOS 1,000 mg against 14,514 products25 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.25 mg

64% of 14,514 products listing sodium give more (median 55 mg).

Fructooligosaccharides4 gFructo-Oligosaccharides in FOS 1,000 mg against 526 products4,000 mg per serving; the middle half of products list 75 mg to 500 mg, the median 185 mg.4,000 mg

Higher than 96% of 526 products listing fructo-oligosaccharides (median 185 mg).

Source: NIH ODS Dietary Supplement Label Database, label 274610 (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:

  • 91% of the 6,910 products that print an amount of iron list more than its 0.45 mg of iron (median 5 mg).
  • Its 4,000 mg of fructooligosaccharides (filed by NIH under fructo-oligosaccharides) is higher than 96% of the 526 fructo-oligosaccharides products that print an amount; 17 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?

The products whose ingredient lists overlap most with FOS 1,000 mg's, rare ingredients counting for more.

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: 3 to 4 tablets daily.
Warnings
Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, preservatives, or artificial color, flavor or fragrance.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 274610.

What else is on the label?

Other ingredients: Stearic Acid, Hydroxypropyl Cellulose, modified Cellulose Gum, Magnesium Stearate.

How many labels does FOS 1,000 mg have?

One label is on file, entered on September 22, 2022.

  1. Label 274610 (current) Entered September 22, 2022 · on the market · 100 tablets · UPC 0 21078 00575 9

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?