LEUCINE

What is leucine?

LEUCINE is one of the three branched-chain amino acids (the other two being Isoleucine and Valine) and is extremely important. It is naturally found in nuts, brown rice, whole wheat, cottage cheese, chicken, and fish. Unlike amino acids, which are metabolized in the liver, BCAAs are metabolized in the muscles and are integral for protein synthesis and for preserving lean muscle tissue. LEUCINE is one of the most concentrated amino acids within the skeletal muscle tissue.

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What does leucine do?

Leucine stimulates muscle protein synthesis by activating the mTOR (mechanistic target of rapamycin) pathway, a central regulator of muscle growth and recovery. By increasing consumption, the mTOR pathway is signaled and protein synthesis is increased. No single ingredient has the pure, unadulterated anabolic power that LEUCINE does. Simply stated, it is essential for achieving a positive nitrogen balance and building lean muscle mass.*

Benefits and effects of leucine supplementation

Leucine supplementation is well-known for its powerful anabolic effects, making it a top choice for athletes and active individuals looking to build muscle, preserve lean mass, and boost strength. By directly influencing key muscle-building pathways, leucine offers several performance and recovery benefits:

• Stimulates muscle protein synthesis via activation of the mTOR pathway

• Supports lean muscle growth and helps prevent muscle breakdown

• Enhances recovery after intense workouts

• Preserves muscle mass during calorie deficits or cutting phases

• Improves endurance and performance when combined with training

• Supports a higher resting metabolic rate

• May reduce muscle soreness and speed up repair of muscle fibers

LEUCINE: The Key to Unlocking Protein Power

Leucine is one of the most important essential amino acids for muscle building and overall health. Often referred to as a "limiting nutrient," leucine plays a critical role in helping the body absorb and use other essential amino acids. Without enough leucine, your body can’t properly process protein, no matter how much you consume. That means optimal leucine intake is key to muscle recovery, growth, and overall protein utilization.

ALLMAX’s Pure, Micronized Leucine for Maximum Absorption

Our Leucine supplement is 100% pure, free from binders, fillers, additives, and preservatives. ALLMAX goes beyond standard quality to deliver performance-driven precision. We start with the highest-grade Leucine available, then refine it even further. While most Leucine finishes as a coarse crystalline powder, we take it through a specialized micronization process to create an ultra-fine, fast-dissolving powder. The result? Superior mixability and optimal absorption to support muscle growth and recovery.*

Available in a 400 gram size.

*These statements have not been evaluated by the Food and Drug Administration.

LEUCINE

Who can use leucine?

Leucine is beneficial for anyone, from casual exercisers to serious athletes and bodybuilders looking to support muscle growth, strength, and recovery. However, it is not recommended for anyone under 18. Do not use if pregnant or breastfeeding. 

I’ve heard LEUCINE doesn’t taste very good. How can I combat this?

Pure Leucine naturally has a neutral flavor with a slightly tart or bitter note. As an unflavored amino acid, it may not fully dissolve in water. We recommend adding it to your ISOFLEX protein shake, a flavored mix, or juice, such as squeezed lemon with an artificial sweetener like Stevia. For best results, it is recommended that you mix it with an electric blender.