PlainVitamins

L-Isoleucine

by BulkSupplements.com · powder · 500 grams

  • On the market (NIH)
  • UPC X000J3NLOL
  • DSLD label 312176
  • Serving 1,000 mg (about 1/3 teaspoon)
  • 500 servings

L-Isoleucine by BulkSupplements.com lists one ingredient: 1,000 mg of L-isoleucine per serving of 1,000 mg. Its current label entered the NIH Dietary Supplement Label Database on May 23, 2024.

What is in L-Isoleucine?

Each row as the label prints it, per serving of 1,000 mg. 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).

L-Isoleucine: Supplement Facts rows against the market (DSLD label 312176, January 2026 release)
IngredientAmount% DVAmong products listing it
L-Isoleucine1,000 mgIsoleucine in L-Isoleucine against 1,614 products1 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.23 g.1 g

53% of 1,614 products listing isoleucine give more (median 1.23 g). Per day at the most servings: 2 g.

Source: NIH ODS Dietary Supplement Label Database, label 312176 (entered May 23, 2024), 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?

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 1 to 2 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, take 1000 mg (about 1/3 tsp) once or twice daily, or as directed by a physician.
Warnings
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
Allergens and what it does not contain
Free of: Added sugar, soy, dairy, yeast, gluten, additives
Storage
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place

Source: label statements in DSLD label 312176.

How many labels does L-Isoleucine have?

8 labels are on file under this name since August 23, 2021: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 312176 (current) Entered May 23, 2024 · on the market · 500 grams · UPC X000J3NLOL
  2. Label 312175 Entered May 23, 2024 · on the market · 250 grams · UPC X000J9CY6L
  3. Label 312174 Entered May 23, 2024 · on the market · 100 grams · UPC X000J3NMCH
  4. Label 312173 Entered May 23, 2024 · on the market · 1 kilogram · UPC X000J3NKOH
  5. Label 254538 Entered October 22, 2021 · on the market · 500 grams · UPC X000J3NLOL
  6. Label 254536 Entered October 22, 2021 · on the market · 250 grams · UPC X000J9CY6L
  7. Label 254529 Entered October 22, 2021 · on the market · 100 grams · UPC X000J3NMCH
  8. Label 252779 Entered August 23, 2021 · on the market · 1 kg · UPC X000J3NKOH

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

Who makes it?

The label names BulkSupplements.com (distributor), Henderson, NV. All BulkSupplements.com products.

Where next?