PlainVitamins

Instantized L-Leucine Unflavored

by Muscle Feast · powder · 7 ozs

  • On the market (NIH)
  • DSLD label 259984
  • Serving 2.5 g (1 Level 5cc Scoop)
  • 80 servings

Instantized L-Leucine Unflavored by Muscle Feast lists one ingredient: 2,500 mg of L-leucine per serving of 2.5 g. Its current label entered the NIH Dietary Supplement Label Database on February 23, 2022.

What is in Instantized L-Leucine Unflavored?

Each row as the label prints it, per serving of 2.5 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).

Instantized L-Leucine Unflavored: Supplement Facts rows against the market (DSLD label 259984, January 2026 release)
IngredientAmount% DVAmong products listing it
L-LeucineFree form2,500 mgLeucine in Instantized L-Leucine Unflavored against 2,056 products2.5 g per serving; the middle half of products list 1 g to 3.5 g, the median 2.5 g.2.5 g

42% of 2,056 products listing leucine give more (median 2.5 g). Per day at the most servings: 7.5 g.

Source: NIH ODS Dietary Supplement Label Database, label 259984 (entered February 23, 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?

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 3 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?

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: As an adult dietary supplement, take one serving (2.5 g) in 6-8 ounces of a flavored beverage, 2-3 times per day or as directed by your doctor. Mix 1 level (2.5 g) scoop with 6-8 oz. water or beverage of choice up to 3 times a day.
Warnings
Keep out of reach of children.
Do not exceed the recommended dose. Consult your physician before using this product.
Do not use this product if you are pregnant or nursing. Do not use this product if you are taking any prescription medication.
Do not use this product if you are under the age of 18.
Warning: This product is manufactured in a GMP compliant plant that processes milk.
Allergens and what it does not contain
Gluten Free
Storage
Keep tightly closed in a cool, dry place away from sunlight.

Source: label statements in DSLD label 259984.

What else is on the label?

Other ingredients: Lecithin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Made in our GMP Compliant Facility Made in an FDA Registered Facility Certified Gluten Free GFCO.org Certified Vegan AVA American Vegetarian Association. Listed with: Certified gluten-free (GFCO), Certified Vegan (Vegan Action) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Instantized L-Leucine Unflavored have?

2 labels are on file under this name since February 26, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 259984 (current) Entered February 23, 2022 · on the market · 7 ozs
  2. Label 214687 Entered February 26, 2020 · off the market September 2, 2021 · 7 oz.

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

Who makes it?

The label names Muscle Feast (manufacturer), Nashport, OH. All Muscle Feast products.

Where next?