L-Leucine®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 0.5 Teaspoon(s) · 1 per day

Not Present

• 

  Source Naturals L Leucine

  Vitacost.com4.8(142)

  $14.43
• 

  Source Naturals L-Leucine Powder 100 gm

  Instacart4.8(142)

  $67570.00
• 

  Beyond Raw Chemistry Labs L-Leucine 30 Servings

  GNC4.4(14)

  $24.99
• 

  Nutricost L-Leucine Capsules

  iHerb4.7(130)

  $13.95
• 

  Nutricost L-Leucine Unflavored 500 Grams

  Vitacost.com4.3(718)

  $21.95
• 

  Best Naturals L-Leucine Pure Powder

  Walmart - Best Naturals4.1(14)

  $21.99
• 

  BCAA Source Naturals

  Herbs Direct4.2(5)

  $9.21
• 

  Now Foods L-Leucine Powder

  The Food Mill4.8(69)

  $28.79

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• GNC

  4.4 (162)

  Vitamin & supplements store

  4706 Vestal Pkwy E Ste 3, Vestal, NY 13850

  Directions(607) 729-2390

• Effects of L-leucine supplementation and resistance training on adipokine markers in untrained perimenopausal and postmenopausal women

  TJ Chapman-Lopez, LLK Funderburk… - The Journal of …, 2024 - journals.lww.com

  … The leucine supplement (Source Naturals, Scotts Valley, CA) was given to subjects and consumed as 10 gelatin capsules per day, equal to 5 g of leucine. Apple pectin (NOW, Elmhurst, …

  20246 citations

• l-Leucine Increases Skeletal Muscle IGF-1 but Does Not Differentially Increase Akt/mTORC1 Signaling and Serum IGF-1 Compared to Ursolic Acid in Response to …

  DD Church, NA Schwarz, MB Spillane… - Journal of the …, 2016 - Taylor & Francis

  … Participants completed a medical history … and l-leucine had any differential effects on serum and muscle IGF-1 concentrations. At the 3 g dose provided, we observed no supplement-…

  201641 citations

• Leucine‐enriched whey protein supplementation, resistance‐based exercise, and cardiometabolic health in older adults: a randomized controlled trial

  B Kirk, K Mooney, S Vogrin, M Jackson… - Journal of cachexia …, 2021 - Wiley Online Library

  … protein, plus 0.03 g/kg BW l-leucine), together with a shaker bottle (for mixing the supplement with 250 mL water), instructions for consuming the supplements thrice a day for 16 weeks, …

  202154 citations

• Efficacy of a novel formulation of L-Carnitine, creatine, and leucine on lean body mass and functional muscle strength in healthy older adults: a randomized, double …

  M Evans, N Guthrie, J Pezzullo, T Sanli… - Nutrition & …, 2017 - Springer

  … Creatine supplementation has also been suggested to … Since L-Carnitine, L-leucine, and creatine have been shown to … dietary supplements on muscle mass and strength in healthy …

  201783 citations

• L‐leucine promotes axonal outgrowth and regeneration via mTOR activation

  C Ma, L Teng, G Lin, B Guo, R Zhuo, X Qian… - The FASEB …, 2021 - Wiley Online Library

  … Thereafter, we evaluated the effects of L- leucine supplementation on axotomy of the cultured neurons. We used a fire polished- glass fine pipette to triturate neurons and damage the …

  202147 citations

• The impact of L-branched-chain amino acids and L-leucine on malnutrition, sarcopenia, and other outcomes in patients with chronic liver disease

  ALS Dos Santos, LR Anastácio - Expert Review of …, 2021 - Taylor & Francis

  … L-branched-chain amino acids (L-BCAA) and isolated l-leucine supplementation in chronic liver … in the general perception of health in patients with liver cirrhosis who received L-BCAA …

  202119 citations

• Reading BCAA and Amino Acid Labels

  What the leucine, isoleucine, and valine ratios on a BCAA label tell you, and how amino acid amounts are listed.

  VitaSuppTrack Editorial· Jun 24, 2026

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-05-24. DSLD Label ID: 73795. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.