The short answer · Exercise tolerance
Take propionyl-l-carnitine for exercise tolerance. This is the one to buy.
Life Enhancement, PropeL™, 240 Vegetarian Capsules
4.5· 119 ratings· $2.18/serving
Propionyl-L-Carnitine 2 g — inside the studied 1-3 g window
Of 447 products scored for Exercise tolerance, Life Enhancement, PropeL™, 240 Vegetarian Capsules ranks #1 with a DoseRank score of 69. Propionyl-L-Carnitine is the strongest evidence signal for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Propionyl-L-Carnitine — not Ubiquinone?”Evidence Strong evidence
Propionyl-L-Carnitine is the strongest evidence signal for this outcome.
- Propionyl-L-CarnitineThe pick
Strong evidence · 2 g
Propionyl ester of L-carnitine with preferential uptake in vascular and cardiac tissue; the form most studied for peripheral artery disease and male sexual function.
- Ubiquinone
Strong evidence · 200 mg
The oxidized, stable form of CoQ10 in most supplements; well-studied and cheaper, but must be reduced to ubiquinol in the body, lowering its bioavailability.
The dose“Is the dose actually effective?”Dose fit 78
Propionyl-L-Carnitine at 2 g lands inside the studied 1-3 g window.
Propionyl-L-Carnitine
Studied window 1-3 g · this pick 2 g
The ranking“Why should I trust this pick?”Trust 50
Mixed trust signals — ratings are positive but the base is limited. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 447 products scored
- Never paid placement
- Evidence level: Strong · 92
- 95 brands
- 5 ingredients
The price“Can I do better than $2.18 a serving?”Value 16
$2.18 per serving — high price tier for this outcome. The cheapest ranked pick here is $0.14 per serving.
- 2California Gold Nutrition, CoQ10 with Bioperine® Black Pepper Extract, 360 Veggie CapsulesScore 52 · $0.14/servingiHerb
- 3California Gold Nutrition, CoQ10 with Bioperine® and Black Pepper Extract, Enhanced Biovailability, 120 Veggie CapsulesScore 52 · $0.17/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $2.18 a serving.Life Enhancement, PropeL™, 240 Vegetarian Capsules — in stock at a tracked retailer.
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Life Enhancement, PropeL™, 240 Vegetarian Capsules ranks #1 for Exercise tolerance with a DoseRank score of 69. The score blends clinical strength, evidence, dose fit, trust signals and value across 447 products scored for this outcome.