Nutricost Pure L-Leucine Powder (500 Grams)
For serious athletes and anyone looking to maximize the results of their training, providing your body with the right building blocks is non-negotiable. Nutricost Pure L-Leucine Powder delivers a clean, high-quality source of the most critical branched-chain amino acid (BCAA) for signaling muscle protein synthesis. This unflavored powder allows for versatile use, easily mixing into your favorite beverage to support your fitness and recovery goals.*
Quality & Potency You Can Count On
- ✅ Third-Party Tested: Every batch is tested by independent, ISO-accredited laboratories for quality and safety.
- ✅ GMP Compliant Facility: Manufactured in an FDA-registered, Good Manufacturing Practice compliant facility.
- ✅ Clean Formula: Non-GMO, Gluten-Free, Soy-Free, and suitable for vegetarians.
The Master Amino Acid for Muscle Protein Synthesis*
L-Leucine is widely regarded by scientists and sports nutritionists as the primary BCAA responsible for stimulating muscle protein synthesis (MPS), the fundamental process of repairing and building muscle tissue.* By supplementing with L-Leucine around your workouts, you provide a key signal that helps kickstart this crucial anabolic process, creating an optimal environment for muscle adaptation and maintenance.*
Optimize Your Post-Workout Recovery*
Intense training breaks down muscle fibers; recovery is when they rebuild stronger. L-Leucine plays a vital role in this recovery phase. A targeted dose of L-Leucine in your post-workout shake can aid in reducing muscle soreness and supports a faster return to peak performance, helping you stay consistent and effective in your training regimen.*
For an in-depth scientific perspective, you can read the scientific literature on L-Leucine’s role in muscle protein synthesis at the National Library of Medicine (PubMed Central).
Expert Review
“From an exercise physiology standpoint, L-Leucine is the most potent activator of the mTOR pathway, which is the master regulator of muscle protein synthesis. For athletes aiming to optimize their anabolic response to training, supplementing with pure L-Leucine is a highly effective, evidence-based strategy. A clean, third-party tested product like Nutricost’s is essential for ensuring purity and accurate dosing, which are critical for achieving desired outcomes.”
— Dr. Youssef El-Amin, PhD, CISSN, Certified Sports Nutritionist (view bio)
How to Use
As a dietary supplement, mix 1 scoop with 6-10 oz of water, juice, or your preferred beverage. Consume before, during, or immediately after your workout for best results. On non-training days, it can be taken between meals.
Important Safety Information
This product is only intended for healthy individuals 18 years of age or older. Consult your physician before use if you are pregnant or nursing, taking any medication, or have a pre-existing medical condition. Discontinue use and consult your doctor if you experience any adverse reactions. Keep out of reach of children. Store in a cool, dry place.
Frequently Asked Questions (FAQ)
What exactly does L-Leucine do?
L-Leucine is an essential amino acid, meaning the body cannot produce it. Its primary role in a fitness context is to act as a powerful signaling molecule that initiates the process of muscle protein synthesis, which is crucial for repairing, maintaining, and building muscle tissue after exercise.*
Why should I take L-Leucine instead of a full BCAA or EAA supplement?
While full-spectrum BCAA/EAA supplements are beneficial, supplementing with pure L-Leucine allows you to specifically boost the key trigger for muscle protein synthesis. Many athletes add extra L-Leucine to their existing protein or EAA shakes to ensure they meet the “leucine threshold” needed to maximize the anabolic signal.
Is this L-Leucine powder flavored?
This product is the unflavored version, which makes it ideal for mixing into other flavored supplements like protein powder or pre-workouts without altering their taste. Nutricost may offer flavored versions separately.
Disclaimer:
*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.
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