Everything DoseRank tracks on the leucine shelf — L-Leucine. The category itself is never ranked: 31 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing leucine supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 24 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Sarcopenia statusPresence of low muscle mass and function.24 rankedStrong
Advanced glycation end productsMarkers of glycation-related tissue damage.4 rankedModerate-strong
Muscle massQuantity of skeletal muscle tissue.24 rankedStrong
AlertnessWakefulness and readiness to respond.6 rankedStrong
Exercise recoveryReturn to baseline function after exertion.24 rankedModerate-strong
Reaction timeSpeed of physical or cognitive response to a stimulus.1 rankedStrong
Delayed-onset muscle sorenessPost-exercise muscle pain and stiffness.25 rankedModerate-strong
FatiguePersistent tiredness, low stamina, or lack of energy.29 rankedStrong
Perceived exertionSubjective difficulty of physical effort.1 rankedStrong
Thiamine statusBiochemical sufficiency of vitamin B1.4 rankedStrong
Endurance performanceAbility to maintain effort over a prolonged duration.6 rankedStrong
Skin elasticityAbility of skin to stretch and recoil.4 rankedModerate-strong
Muscle damage biomarkersMarkers such as creatine kinase indicating exercise-related tissue stress.7 rankedStrong
Neuropathy symptomsPain, numbness, or dysfunction due to peripheral nerve problems.4 rankedModerate-strong
Erectile functionAbility to achieve and maintain an erection.2 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best leucine supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 31 products against that goal's trials.