L-Leucine - Featuring AjiPure

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L-leucine is an essential amino acid and it must be acquired through diet or supplementation. Food sources for L-leucine are meat, almonds, cashews eggs, fish, chicken, lentils and liver. It helps increase energy, enhance endurance and aid in muscle recovery. Swanson L-Leucine delivers a potent 500 mg per serving from vegan-sourced AjiPure pharmaceutical grade L-leucine.


Supplement Facts

Serving Size 1 Vegan Capsule

Servings Per Container 60

Amount Per Serving % Daily Value
AjiPure® Pharmaceutical Grade L-Leucine 500 mg *

*Daily Value not established.

Other Ingredients: Hypromellose (vegan capsule), rice flour, magnesium stearate, silica.

Suggested Use: As a dietary supplement, take one vegan capsule two times per day with water.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.

Trademark Information: AjiPure® and the AjiPure® logo are registered trademarks of Ajinomoto, Inc.




  1. How does L-leucine support muscle protein synthesis?
    L-leucine helps activate the body's natural muscle protein synthesis pathway, the process by which the body builds and repairs muscle proteins. This makes it an important nutrient for maintaining lean muscle, especially after resistance exercise and as part of healthy aging.
  2. Should I take L-leucine before or after a workout?
    L-leucine can be taken either before or after exercise, but it is most commonly used after a workout to support the body's natural muscle recovery and protein synthesis processes. Follow the directions on the product label for best results.
  3. Can L-leucine help support healthy aging?
    Yes. Maintaining muscle health becomes increasingly important with age. Because L-leucine supports muscle protein synthesis and lean muscle maintenance, it can be a valuable part of a healthy aging plan when combined with regular physical activity and adequate dietary protein.
  4. What makes Swanson AjiPure® L-Leucine unique?
    Swanson AjiPure® L-Leucine delivers 500 mg of AjiPure® pharmaceutical-grade L-leucine, a vegan-sourced amino acid produced through a precision fermentation process for exceptional purity and quality.
  5. Is Swanson AjiPure® L-Leucine suitable for special diets?
    Swanson AjiPure® L-Leucine is vegan, vegetarian, non-GMO, and gluten free. However, it is not dairy free. Always review the product label for the most current ingredient and allergen information.


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