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114 reviews
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What Is L-Leucine?

L-leucine, sometimes simply referred to as Leucine, is a branched chain amino acid (BCAA) that plays an important role in energy production and muscle maintenance. L-leucine can be found in meats, dairy, wheat, and soy and is most commonly taken by bodybuilders and athletes to help boost athletic performance.

L-Leucine Benefits

L-leucine is the most important of the BCAAs and is commonly taken as part of a preworkout regimen to aid muscle recovery and promote lean muscle growth.

  • Branched Chain Amino Acid (BCAA)
  • Helps increase athletic performance
  • Boosts athletic endurance
  • Promotes lean muscle growth
  • Aids muscle recovery
Supplement Facts
Serving Size: 2500 milligrams
Servings Per Container: -
Amount Per Serving % Daily Value
L-Leucine 2500 mg *
* Daily Value not established.
Other Ingredients: None
Free of: Added Sugar, Soy, Dairy, Yeast, Gluten, Additives

Suggested Use: As a dietary supplement, take 2500 mg (about 1 tsp) once or twice daily, or as directed by a physician.

Store in a dry, cool place

Always consult your health care provider before taking any supplements. Pregnant or lactating women, people with existing medical conditions, or people taking medications should consult their health care provider/s before taking any dietary supplement. If you experience any adverse condition after taking this dietary supplement, discontinue use immediately and consult your health care provider.

Keep out of reach of children.

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

Customer Reviews
4.9 Based on 114 Reviews
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Danny D.
United States United States
I recommend this product
Dusty Delivery

When I opened the package containing the bulk supplement bags, my hands were coated in a white powder. I originally thought that one of the bags was broken. However, that was not the case. Not really certain how the powder got into the external package. This was the first time that this had ever happened.

Timothy H.
United States United States
I recommend this product
Add this to your post workout meal

Incredible post weight training supplement to add to a high protein meal. L-Leucine Review
A Customer
Matthew S.
United States United States
I recommend this product
High Quality

Good stuff. I've been powerlifting for two decades, and I started taking Leucine about 8 years ago. I noticed IMMEDIATELY that I was less sore the day after working out. It wasn't a small difference either. I've used Bulk Supplements Leucine the entire 8 years, and never been disappointed.

wade k.
United States United States
I recommend this product
Smell is off, may have a bad batch?

I took a recommended dose of this as well as a recommended dose of N-acetyl L-cysteine (I bought them at the same time) and within a short time I became violently ill and threw up, which I haven’t done in years as I have a pretty strong stomach. The other supplements I’ve gotten here are all good, some have a slight gross smell or taste but nothing like this especially the N-acetyl L-cysteine smelled like death and I feel dumb for even choking it down. Now I’m afraid to take the l- leucine either because I don’t want to get sick again. Disappointing/maybe dangerous L-Leucine Review
Steve B.
United States United States
I recommend this product
Supp purchase

Speedy delivery though I was disappointed that you are consistently out of the package size I wanted. I checked a couple times and had to settle for the smaller package of Leucine.

Mary T.
United States United States
I recommend this product
Bulk Supplements Are My Go To Suppler!

As always ,wonderful and I have ordered from Bulk Supplements before.