Leucine

NutraBio L-Leucine delivers pure, fermented leucine to maximize muscle protein synthesis, accelerate recovery, and support lean muscle growth.

• Clinically dosed to trigger muscle protein synthesis
• Helps prevent muscle breakdown and preserve lean mass
• Supports faster recovery after intense training sessions
• Pure-grade, naturally fermented, vegan amino acid
• Available in both powder and capsule form
  

Pure L-Leucine for Maximum Muscle Growth and Recovery

Unlock your muscle-building potential with L-Leucine, the essential branched-chain amino acid that flips the switch on muscle protein synthesis. Leucine is one of the nine essential amino acids that the human body cannot produce on its own, making it a critical part of your daily nutrition. As one of the primary building blocks of muscle tissue, it works alongside other amino acids to stimulate growth and repair after training.

Whether you choose the convenience of capsules or the versatility of unflavored powder, every serving provides full clinical dosing of pure, HPLC-tested, naturally fermented leucine. NutraBio’s L-Leucine is part of our full line of amino acid supplements designed to support strength, recovery, and performance.

Why Choose NutraBio L-Leucine?

Muscle Growth

L-Leucine is the key amino acid that activates the anabolic signal for muscle growth, helping your body build lean mass more effectively. As one of the most important amino acid residues in protein, leucine ensures your body maximizes the benefits of the essential amino acids you consume from protein-rich foods and supplements.

Muscle Recovery

Training breaks down muscle fibers, but L-Leucine helps stop catabolism and speeds up repair so you can recover faster and train with intensity day after day. When paired with glutamic acid and aspartic acid, which are abundant in muscle tissue, L-Leucine works synergistically with other amino acids to rebuild muscle stronger.

The Purest Form of Leucine

NutraBio L-Leucine is naturally fermented, vegan, and HPLC-tested for purity. With no fillers, flavors, or unnecessary additives, it is clean, effective, and uncompromising in quality. Every serving supports the human body with the exact nutrients it needs to build and repair muscle.

Choose Your Form: Powder or Capsules

L-Leucine is available in both powder and capsule form, giving you flexibility to use it your way. Mix the powder into your stack or take the convenience of capsules. Either way, you are fueling your body with the purest leucine available, helping ensure your intake of essential amino acids is optimized for performance.

Powder(166 Servings): 3,000mg L-Leucine Per Serving (1 Scoop)

Capsule(45 Servings): 1,600mg L-Leucine Per Serving (4 Capsules) 

ORDERS IN THE US OVER $99 SHIP FREE

We are delighted to offer our customers free shipping on domestic orders to continental U.S when they spend over $99. However, please note that this option is not available for orders shipped to Hawaii, Puerto Rico, Alaska, or internationally, and is also not applicable to wholesale orders.

NutraBio's Forever & A Day Guarantee

At our NutraBio Family Of Brands, we are proud to be the only company that offers a Forever & A Day Guarantee without a catch!

Refund requests made within 90 days of purchase are eligible for a full refund. For requests beyond 90 days, we’re happy to offer a full exchange.

Our unique Forever & A Day Guarantee allows you to return or exchange our supplements anytime, anywhere and for any reason. Get the ultimate peace of mind and confidence you need to try our products with our NutraBio Forever & A Day Guarantee.

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