🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade

Product Label

📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Label Data

2 Capsule(s) Serving Size
100 Servings
Amino acid/Protein Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

500 mg
📊 Market median: 17.4mg (161 products)
Median 17.4mg This product: 500mg
250 mg
📊 Market median: 17.4mg (161 products)
Median 17.4mg This product: 250mg
L-Valine
250 mg

Other Ingredients

Gelatin Microcrystalline Cellulose Magnesium Stearate

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (100% of products) Structure/Function (90% of products) Nutrient (56% of products)

Target Groups

Adult (18 - 50 Years) Women (not pregnant or lactating)

Product Information

📋 Directions for Use

Directions: Consume 2 capsules with a meal. Suggested use: Intended for use in healthy adults and as part of a healthy, balanced diet and exercise program.

⚠️ Warnings & Precautions

Warning: Consult your physician before using this product if you are taking any medication or are under a physician's care for a medical condition. Not for use by those under the age of 18 or women who are pregnant, trying to get pregnant or are nursing.

Not for use by those under the age of 18 or women who are pregnant, trying to get pregnant or are nursing.

🧪 Formulation Notes

The power of branched chain amino acids L-Leucine, L-Isoleucine and L-Valine are commonly grouped together and referred to as branched chain amino acids, or BCAAs, because of their unique branched chemical structure. BCAAs are essential, meaning they must be consumed through the diet since the human body cannot make them from other compounds.

One 2-capsule serving provides 1000 mg of BCAAs.

1000 mg branched chain amino acids per 2 capsule serving 2:1:1 ratio of L-Leucine, L-Isoleucine and L-Valine

Versatile amino acid support Essential amino acid support

Additional Information

Authentic Optimum Nutrition Product optimumnutrition.com/authentic

Informed Choice We Test You Trust Informed Choice is a quality assurance program for sports nutrition products. The program certifies that nutritional supplements that bear the Informed Choice logo are regularly tested for banned substances by the world class sports anti-doping lab, LGC Limited.

Store in a cool, dry place.

Manufactured in the USA This product contains ingredients of international and domestic origin.

Product Details

UPC / SKU 7 48927 02037 3
DSLD Entry Date 2024-12-21
Product Type Amino acid/Protein
Form Capsule
DSLD ID 319464
Data Updated 2026-04-11

Research Evidence

8 Research Sources
45 Avg Quality Score
7 Clinical Trial
1 Meta Analysis
B Effects of Whey Protein, Leucine, and Vitamin D Supplementation in Patients with Sarcopenia: A Systematic Review and Meta-Analysis
Meta Analysis Nutrients 2023
C Leucine-enriched Branched-chain Amino Acid on Muscle Thickness, Interleukin-6, SOFA Score in Critical Illness
Clinical Trial ClinicalTrials.gov 2023
C The Effects of Leucine Metabolites in Performance, Body Composition and Biochemical Markers of Muscle Damage
Clinical Trial ClinicalTrials.gov 2017
C Can Supplemental Leucine Offset Disuse-induced Muscle Atrophy?
Clinical Trial ClinicalTrials.gov 2017
C Leucine Supplementation in Sarcopenic Older Individuals
Clinical Trial ClinicalTrials.gov 2019
C The Effect of Leucine on Carnitine Transport to Skeletal Muscle
Clinical Trial ClinicalTrials.gov 2016
C Hydrolyzed Casein and Whey Protein Supplementation and the Addition of Leucine to Induce Protein Anabolism in Malnourished COPD Patients
Clinical Trial ClinicalTrials.gov 2009
C Resistance Exercise Training and Amino Acid Leucine Supplementation in Frail Elderly Women
Clinical Trial ClinicalTrials.gov 2013
View all evidence for Leucine →

Compare Similar Products

View all Leucine products →