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Muscle protein synthesis support; Post-workout recovery; Lean muscle support
Active adults who want convenient amino acid support around workouts and people with higher protein needs seeking to bolster post-exercise nutrition.
Take 1 scoop twice daily; take one serving immediately after intense activity. Mix into a protein shake or flavored drink; using an electric blender can improve dispersion.
Gluten Free Tested. Produced in a facility that also handles: milk, soy, egg, peanut, tree nuts, sesame, fish, crustacean, shellfish.
Leucine activates the mTOR pathway in muscle cells, which may stimulate muscle protein synthesis and support recovery after exercise.
Caution: For adults only; consult a healthcare provider if pregnant, nursing, have liver or kidney issues, follow a low-protein diet, or take medications such as levodopa because high amino acid intakes may affect metabolic balance or drug absorption.
Label Warning: For adult use only. Do not use if pregnant or breastfeeding. Consult a healthcare provider if you have a medical condition or use any medication. Consult a healthcare practitioner before use if taking levodopa, have liver or kidney disease, or follow a low protein diet. Stop use if diarrhea, vomiting, nausea, or abdominal swelling occur. Allergen warning: produced in a facility that also handles milk, soy, egg, peanut, tree nuts, sesame, fish, crustacean, and shellfish. California Prop 65: exposure to lead, a chemical known to the State of California to cause birth defects or reproductive harm.
Who should be cautious: People with liver or kidney concerns, on a low protein diet, or taking levodopa. Those with allergies to milk, soy, egg, peanut, tree nuts, sesame, fish, crustacean, or shellfish should be cautious due to shared facility processing.
Storage: Store in a cool, dry place away from sunlight. Keep out of reach of children.
Many users report it may support muscle growth and post-workout recovery, including during low-carb or low-protein diets.
Customers say it blends without clumping when mixed into flavored drinks or protein shakes.
Reviewers find the taste extremely bitter and note it does not dissolve well in plain water, often needing strong flavors to mask it.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
Creatine supports ATP regeneration during intense activity, while leucine triggers anabolic signaling. Together, they may enhance strength gains, workout capacity, and lean mass development.
AI generated. Not medical advice.
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Professional Grade Supplements
Leucine is likely the best single ingredient supplement on the market to build hard, lean, dense muscle, fast! Leucine is an Essential Branched Chain Amino Acid (BCAA) that is known throughout bodybuilding as the ultimate muscle-builder. It's considered essential because your body cannot produce it, so it must be supplied by your diet. Leucine activates an anabolic pathway called the mTOR which stimulates muscle protein synthesis. By increasing Leucine consumption the mTOR pathway is activated and protein synthesis is increased. Simply stated, Leucine is essential for achieving a positive nitrogen balance and building lean muscle mass.
The ALLMAX Advantage: ALLMAX brings you the purest and most powerful crystalline Leucine powder with zero binders, excipients, additives or preservatives. In the final stage of Leucine production, the result is a coarse crystalline structure. We've taken the raw crystal material and microparticulated it through a complex series of processes, resulting in perfect, ultra-fine white powder that has optimal absorption levels.
One serving (1 scoop) 2 times per day. (Take one serving immediately after intense activity).
Serving Tip: Pure Leucine by nature basically tastes neutral with a slightly tart or bitter taste and does not dissolve immediately 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 or Sucralose. Mixing with an electric blender is recommended.
Allergen Warning: Produced in a facility that also handles milk, soy, egg, peanut, tree nuts, sesame, fish, crustacean and shellfish products.
Product of USA with domestic and imported materials.
If you get cheap Leucine that dissolves instantly, you may need to be concerned about the source of your Leucine. Without additional processing, real Leucine does not dissolve easily or quickly.
For adult use only. Do not use if pregnant or breast feeding. Consult a health care provider if you have been treated for or diagnosed with a medical condition, or if you are using any medication. Consult a health care practitioner prior to use if you are taking Levodopa or if you have liver or kidney disease or if you are following a low protein diet. Discontinue use if you have any of the following side effects: diarrhea, vomiting, nausea and/or abdominal swelling. Do not use if inner seal is broken. Store in a cool dry place away from sunlight. Keep out of reach of children.
California Warning: Lead is known to the State of California to cause birth defects or reproductive harm. Consuming this product can expose you to more than 0.0000005 g of lead. Prop 65.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 1 Scoop (5 g) | ||
| Servings Per Container: 80 | ||
| Amount Per Serving | %Daily Value | |
| Leucine | 5 g | † |
| †Daily Value not established. | ||
