L-Carnitine
3 brands compared · cheapest first
Life ExtensionBest value
Acetyl-L-Carnitine (3-month supply)
500 mg ALCAR · 100 capsules
$24.00for 100 doses
$0.240per dose
$0.00048 / mg
Best value. Optimized Carnitine (B0792NSRG3, $23.25/60 caps) includes 3 forms (acetyl + propionyl + L-carnitine tartrate) for fuller spectrum.
Thorne
Acetyl-L-Carnitine 500 mg
500 mg acetyl-L-carnitine · 60 capsules
$32.00for 60 doses
$0.533per dose
$0.00107 / mg
Acetyl form (ALCAR) crosses blood-brain barrier — preferred for cognitive use.
Pure Encapsulations
Acetyl-L-Carnitine 500 mg
500 mg acetyl-L-carnitine · 60 capsules
$80.00for 60 doses
$1.333per dose
$0.00267 / mg
2.5x more expensive than Thorne for the same product. PE premium pricing without clear benefit here.