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Branched Chain Amino Acids

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

This product looks safe

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

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

Branched-chain amino acids are used to support muscle protein synthesis and reduce exercise-induced muscle soreness. There is moderate evidence suggesting these ingredients may help decrease fatigue during intense physical activity. Research indicates a high safety profile for these amino acids when used in standard dosages.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Branched Chain Amino Acids
Open Full PDF View on NIH DSLD →
Details

Label Data

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

Supplement Facts — Evidence Check

Market median: 500.0mg (180 products) 5 studies (A:0, B:1)

Other Ingredients

Hypromellose Stearic Acid
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

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.

Metadata

Product Details

DSLD Entry Date2021-02-25
Product TypeAmino acid/Protein
FormCapsule
DSLD ID244493
Data Updated2026-04-11
Research

Research Evidence

8
Research Sources
45
Avg Quality
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
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
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.