Out of stock, Shipping Will Be Delayed

Source Naturals L-Leucine Powder 100 Grams

Current Stock:

Source Naturals L-Leucine Powder 3.53oz

L-Leucine is an essential amino acid, specifically classified as a "branched-chain amino acid" (BCAA). BCAAs, especially leucine, stimulate muscle protein synthesis and may be the major fuel involved in muscle building processes. This makes them especially important for body builders and other athletes in sports that demand explosive strength.

Source Naturals L-Leucine Powder Product Highlights

  • L-Leucine May Improve Cognition 
  • Helps Reduce Muscle Fatigue 
  • Supports Protein Synthesis
  • Great for Bodybuilders & Athletes of All Types

What is L-Leucine Used For?

L-Leucine is an Essential Amino Acid which supports protein synthesis. It also helps to regulate several cellular processes such as protein synthesis, tissue regeneration, and metabolism. 

When is the Best Time to Take L-Leucine?

L-Leucine is best taken while fasted or with a low protein meal. 


Mix 1/2 teaspoon with water, shake, smoothie or beverage of your choice, ideally between meals. 

Source Naturals L-Leucine Powder 100 Grams Supplement Facts

Serving Size: 1/2 Teaspoon

Servings Per Container: About 76

L-Leucine 1g

Other Ingredients: None


This product does not contain dairy, egg, gluten, sugar, or preservatives. Do not take if you are pregnant or breastfeeding. Keep out of reach of children. 


 Pedroso JA, Zampieri TT, Donato J Jr. Reviewing the Effects of L-Leucine Supplementation in the Regulation of Food Intake, Energy Balance, and Glucose Homeostasis. Nutrients. 2015;7(5):3914-3937. Published 2015 May 22. doi:10.3390/nu7053914

Payne EM, Virgilio M, Narla A, et al. L-Leucine improves the anemia and developmental defects associated with Diamond-Blackfan anemia and del(5q) MDS by activating the mTOR pathway. Blood. 2012;120(11):2214-2224. doi:10.1182/blood-2011-10-382986

†We make every effort to ensure that the product images displayed on our website faithfully represent what you will receive. However, we recognize that digital representations can sometimes fall short of capturing every nuance of the product's physical attributes. Differences in color, size, and packaging details might exist. To mitigate this, we advise our valued customers to delve into the product descriptions where the specific features, ingredients, and usage instructions of each product are meticulously outlined. This approach helps bridge the gap between expectation and reality, ensuring you are fully informed about your purchase.

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to treat, cure, diagnose, or prevent any disease.

Visit Our Chicagoland Retail Stores