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Weight Loss · 3 min read
L-Carnitine: Injection vs Oral
Why clinicians prefer the injection — and when oral makes sense.
Bioavailability gap
Oral L-carnitine has poor absorption (~14–18%). Injectable is ~100%.
What it does
Shuttles fatty acids into mitochondria — where they get burned for energy.
Use cases
Fat loss, endurance training, cognitive clarity, recovery.
Stacking
Pairs well with GLP-1s for weight loss and with TRT/DHEA for recovery.
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