Everything DoseRank tracks on the l-carnitine shelf — Propionyl-L-Carnitine. The category itself is never ranked: 162 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 l-carnitine 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 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Angina symptomsChest discomfort due to reduced cardiac blood flow.77 rankedModerate-strong
Fat oxidationUse of fat as an energy source.130 rankedModerate-strong
Sperm motilityAbility of sperm to move effectively.119 rankedStrong
Muscle damage biomarkersMarkers such as creatine kinase indicating exercise-related tissue stress.69 rankedStrong
Delayed-onset muscle sorenessPost-exercise muscle pain and stiffness.138 rankedModerate-strong
Exercise recoveryReturn to baseline function after exertion.76 rankedStrong
Fasting blood glucoseBlood glucose after fasting.91 rankedStrong
Endurance performanceAbility to maintain effort over a prolonged duration.60 rankedModerate-strong
Neuropathy symptomsPain, numbness, or dysfunction due to peripheral nerve problems.45 rankedStrong
Peripheral circulationBlood flow to limbs and peripheral tissues.5 rankedStrong
Exercise toleranceAbility to continue activity without unacceptable symptoms.6 rankedStrong
Cognitive functionOverall thinking ability including memory, attention, and processing.40 rankedStrong
TriglyceridesCirculating triglyceride concentration.24 rankedStrong
Depressive symptomsLow mood, anhedonia, and related depressive features.52 rankedStrong
ThermogenesisHeat production and metabolic energy expenditure.29 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best l-carnitine supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 162 products against that goal's trials.