PlainVitamins

D-Ribose

by Source Naturals · powder · 200 grams

  • On the market (NIH)
  • UPC 0 21078 02007 3
  • DSLD label 214366
  • Serving 5 g (1 rounded teaspoon)
  • 40 servings

D-Ribose by Source Naturals lists one ingredient: 5 g of D-ribose per serving of 5 g. Its current label entered the NIH Dietary Supplement Label Database on February 26, 2020.

What is in D-Ribose?

Each row as the label prints it, per serving of 5 g. 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).

D-Ribose: Supplement Facts rows against the market (DSLD label 214366, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories20 Calories
Total Carbohydrates5 g2%Carbohydrate in D-Ribose 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).

Sugar5 gSugar in D-Ribose against 11,807 products5 g per serving; the middle half of products list 1 g to 4 g, the median 2 g.5 g

Higher than 78% of 11,807 products listing sugar (median 2 g).

D-Ribose5 gRibose in D-Ribose against 199 products5 g per serving; the middle half of products list 0.5 g to 5 g, the median 2 g.5 g

Higher than 72% of 199 products listing ribose (median 2 g).

Source: NIH ODS Dietary Supplement Label Database, label 214366 (entered February 26, 2020), 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 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 rounded teaspoon daily.
Warnings
Caution: If you are pregnant, may become pregnant, breastfeeding, have gout or any glucose metabolism disorders such as diabetes or hypoglycemia, or if you are taking any prescription drug, 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, soy or wheat. Contains no starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 214366.

How many labels does D-Ribose have?

2 labels are on file under this name since January 25, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 214366 (current) Entered February 26, 2020 · on the market · 200 grams · UPC 0 21078 02007 3
  2. Label 213795 Entered January 25, 2020 · on the market · 100 grams · UPC 0 21078 02006 6

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?