PlainVitamins

FOS Fructooligosaccharides

by Allergy Research Group · powder · 100 grams

  • Off the market since July 2018 (NIH)
  • UPC 7 13947 71920 0
  • DSLD label 79386
  • Serving 0.5 to 1 tsp (1.25-2.5 g); amounts per 0.5 tsp
  • 80 servings

FOS Fructooligosaccharides by Allergy Research Group lists one ingredient: 1.25 g of fructooligosaccharides per serving of 0.5 tsp. Its current label entered the NIH Dietary Supplement Label Database on October 21, 2017.

What is in FOS Fructooligosaccharides?

Each row as the label prints it, per serving of 0.5 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).

FOS Fructooligosaccharides: Supplement Facts rows against the market (DSLD label 79386, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Carbohydrates1.25 g1%Carbohydrate in FOS Fructooligosaccharides against 21,979 products1.25 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.1.25 g

74% of 21,979 products listing carbohydrate give more (median 3 g). Per day at the most servings: 5 g.

Fructooligosaccharides1.25 gFructo-Oligosaccharides in FOS Fructooligosaccharides against 526 products1,250 mg per serving; the middle half of products list 75 mg to 500 mg, the median 185 mg.1,250 mg

Higher than 88% of 526 products listing fructo-oligosaccharides (median 185 mg). Per day at the most servings: 5,000 mg.

Source: NIH ODS Dietary Supplement Label Database, label 79386 (entered October 21, 2017), 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 2 to 4 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?

3 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, 1/2 to 1 level teaspoon (1.25-2.5 grams) mixed in water if desired, two to four times daily between meals, or as directed by a healthcare practitioner.
Warnings
Caution: Some individuals taking FOS may experience gastrointestinal bloating that persists longer than 1-2 weeks, possibly due to unfriendly microbes feeding on FOS. In such cases, this product should be discontinued.
Storage
Keep in a cool, dry place, tightly capped.

Source: label statements in DSLD label 79386.

How many labels does FOS Fructooligosaccharides have?

3 labels are on file under this name since April 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 79386 (current) Entered October 21, 2017 · off the market July 19, 2018 · 100 grams · UPC 7 13947 71920 0
  2. Label 54488 Entered December 23, 2015 · off the market July 31, 2017 · 100 grams · UPC 7 13947 71920 0
  3. Label 20306 Entered April 25, 2013 · off the market November 19, 2015 · 100 g · UPC 7 13947 71920 0

DSLD also links this label to: Fos (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 Allergy Research Group (distributor), Alameda, CA. All Allergy Research Group products.

Where next?