Branched Chain Amino Acids

product on market Capsule NOW Sports 🟢 Safety: 100/100
Brand: NOW Sports
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

4 Veg Capsule(s) Serving Size
30 Servings
Amino acid/Protein Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

2.6 Gram(s)
📊 Market median: 500.0mg (180 products) 📚 5 studies (Tier A: 0, B: 1)
This product: 2.6mg

Other Ingredients

Hypromellose Stearic Acid

Label Claims — Verification

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

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Kosher Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested Usage: Take 4 capsules twice daily before meals or exercise.

⚠️ Warnings & Precautions

Caution: For adults only.

Consult physician if pregnant/nursing, taking medication, or have a medical condition.

Keep out of reach of children.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

🧪 Formulation Notes

Amino acids/recovery

Essential amino acids Leucine isoleucine valine Pure aminos

Triangle K (Kosher)

Steroid Free Non-GMO

The branched-chain amino acids (BCAAs), leucine, isoleucine and valine are essential amino acids, and thus cannot be made in the body. BCAAs are critical for muscle protein synthesis, and because BCAAs can be used as fuel during intense exercise, BCAA supplementation can help to preserve existing muscle tissue. In addition, BCAAs can support the recovery process by promoting the normal repair processes that take place after exertion. BCAAs also play an important role in the maintenance of proper immune system function and the support of healthy aging.

Natural color variation may occur in this product.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.

Typical Branched-Chain Amino Acid composition (2:1:1 approximate ratio) (per 4 capsule serving): L-Leucine (1,170 - 1,400 mg) L-Isoleucine (570 - 700 mg) L-Valine (570 - 700 mg)

NOW Branched-Chain Amino Acids are pharmaceutical grade.

Vegan

Additional Information

Informed-sport We Test-You Trust Informed-choice We Test-You Trust

Triangle K (Kosher)

Store in a cool, dry, dark place after opening.

Product Details

DSLD Entry Date 2021-02-25
Product Type Amino acid/Protein
Form Capsule
Brand NOW Sports
DSLD ID 244493
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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