Nutricost L-Isoleucine 2,000 mg supplement bottle
Nutricost

L-Isoleucine 2,000 mg Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 6 brand certifications checked · Last updated: Aug 2026
93
Product Score Excellent
100
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Isoleucine 2000 mg †
Bioavailability Excellent

Absorption Rating

  • L-Isoleucine Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin
  • Vegetable Magnesium Stearate
  • Vegetable Stearic Acid
  • Stearic Acid
  • Rice Flour
Efficacy Very Good

Dosage Analysis

  • L-Isoleucine 2000 mg High

Supplement Facts

Ingredient Amount % Daily Value
L-Isoleucine 2000 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Vegetable Stearic Acid Generally_safe

It is used to prevent ingredients from sticking to manufacturing equipment.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Brand Trust Report
Nutricost

Founded 2012 · Vineyard, Utah, USA · 1257 products · nutricost.com

Certifications

6 certifications
Consumerlab Verified Source
Labdoor Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source
NSF Certified Verified

Transparency

5 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Testing Lab Disclosure — True
Contains Proprietary Blend — True

Violation History

4 incidents
Fda Warning Unregistered food product2024-08-23Source
Prop 65 Lead2023-12-19Source
Lawsuit Misleading advertising regarding the magnesium content in its magnesium glycinate supplement.2023Source
Lawsuit Mislabeled calorie content and undisclosed artificial flavoring in supplement powders.2022Source
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Frequently Asked Questions
Is Nutricost L-Isoleucine 2,000 mg a good supplement?

Nutricost L-Isoleucine 2,000 mg received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 60 servings per container. Of the 5 inactive ingredients, 4 are rated safe and 0 are flagged for review. The manufacturer, Nutricost, holds a brand trust score of 100/100 with 6 verified certifications including Consumerlab, Labdoor, Nsf Gmp, Usda Organic.

What are the ingredients in Nutricost L-Isoleucine 2,000 mg?

Nutricost L-Isoleucine 2,000 mg contains 1 active ingredients: L-Isoleucine (2000 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nutricost L-Isoleucine 2,000 mg safe to take?

Nutricost L-Isoleucine 2,000 mg has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nutricost a trustworthy supplement brand?

Nutricost receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2012 and headquartered in Vineyard, Utah, USA, the company offers 1257 products in their lineup. They hold 6 verified certifications including Consumerlab, Labdoor, Nsf Gmp, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nutricost has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.