L-Leucine

product on market Capsule NutraBio 🟢 Safety: 100/100
Brand: NutraBio
🟢 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

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Label Data

4 Vegetable Capsule(s) Serving Size
45 Servings
Amino acid/Protein Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

1.6 Gram(s)
📊 Market median: 17.4mg (161 products)
Median 17.4mg This product: 1.6mg

Other Ingredients

Hypromellose Water

Label Claims — Verification

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

Target Groups

Vegetarian Adult (18 - 50 Years) Kosher Gluten Free

Product Information

📋 Directions for Use

Suggested use: Take 1 serving (4 capsules) 1-2 times daily, or as needed.

⚠️ Warnings & Precautions

Warning: Not intended for use by persons under the age of 18. Keep out of the reach of children.

If you are pregnant, breast feeding, have known medical conditions (including kidney or liver disease) or are taking prescription or OTC medication(s) consult with your health care practitioner before using this product.

Warning: Consuming this product can expose you to chemicals including lead, which are known to the State of California to cause birth defects or other reproductive harm. For more information: go to www.P65Warnings.ca.gov/food.

Processed in a facility and/or manufacturing line that also produces milk, tree nuts and nuts.

🧪 Formulation Notes

Vegetarian

Gluten free Non-GMO Lactose free

Manufactured in our GMP & FDA inspected facility

Free form amino acid

OU (Kosher)

Additional Information

Check. Verify. Trust. View independent lab results Checkmysupps.com

Made In USA with Ingredients Sourced Worldwide

Sport 4caps/serv

OU (Kosher)

Store in a cool dry place.

Product filled to this level

Product Details

UPC / SKU 6 49908 23274 0
DSLD Entry Date 2024-05-23
Product Type Amino acid/Protein
Form Capsule
Brand NutraBio
DSLD ID 309338
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
PubMed DOI
C Leucine-enriched Branched-chain Amino Acid on Muscle Thickness, Interleukin-6, SOFA Score in Critical Illness
Clinical Trial ClinicalTrials.gov 2023
ClinicalTrials.gov
C The Effects of Leucine Metabolites in Performance, Body Composition and Biochemical Markers of Muscle Damage
Clinical Trial ClinicalTrials.gov 2017
ClinicalTrials.gov
C Can Supplemental Leucine Offset Disuse-induced Muscle Atrophy?
Clinical Trial ClinicalTrials.gov 2017
ClinicalTrials.gov
C Leucine Supplementation in Sarcopenic Older Individuals
Clinical Trial ClinicalTrials.gov 2019
ClinicalTrials.gov
C The Effect of Leucine on Carnitine Transport to Skeletal Muscle
Clinical Trial ClinicalTrials.gov 2016
ClinicalTrials.gov
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
ClinicalTrials.gov
C Resistance Exercise Training and Amino Acid Leucine Supplementation in Frail Elderly Women
Clinical Trial ClinicalTrials.gov 2013
ClinicalTrials.gov
View all evidence for Leucine →

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