L-carnitine (injectable)
otherAmino-acid derivative (supplement; injectable Rx for deficiency)
Research status · FDA-approved (specific use)
Oral L-carnitine is a common dietary supplement. Injectable levocarnitine (Carnitor) is FDA-approved specifically for carnitine deficiency. Injectable use for fat loss/performance is off-label and not FDA-approved.
L-carnitine helps transport fatty acids into mitochondria for energy. Oral supplements are common; prescription injectable levocarnitine is approved only for carnitine deficiency. Fat-loss/performance injections are off-label with limited evidence.
How it works
Shuttles long-chain fatty acids into mitochondria for beta-oxidation (energy production).
Commonly discussed use cases
- Carnitine deficiency (approved, Rx)
- Fat metabolism/performance (off-label, discussed)
Supposed / potential benefits
- Clear role in deficiency; ergogenic/fat-loss benefits in healthy people are modest/mixed
Common side effects
- GI upset, fishy body odor (higher oral doses)
- Injection-site reactions
- Rare arrhythmia concerns at high IV doses
Warnings & contraindications
- Injectable use outside deficiency is off-label
- TMAO/cardiovascular questions discussed for high chronic intake — a clinician conversation
Typical timing considerations
Oral daily per product; injectable per clinician. Follow guidance.
Administration route
Oral, or IM/IV (clinic/Rx)
Questions to ask your clinician
- Do I actually have a deficiency, or is oral enough?
- Any cardiovascular considerations for me?
Commonly tracked in Reta
Tracking fields organize user-entered, clinician-directed routines — Reta never recommends or computes doses.
Sources
Track this in Reta
Beta members get a ready-made tracker for L-carnitine (injectable) — schedule, dose log, injection-site rotation, reminders, and check-ins — for organizing a clinician-directed routine. Personal tracking is available to everyone during the Public Beta.
Reta is a tracking and education tool — not a medical provider. Nothing here is a diagnosis, treatment, prescription, or dosing recommendation. Peptides and medications should only be used under the direction of a licensed clinician. Talk to a qualified clinician before starting, stopping, combining, or changing anything. Many compounds below are not FDA-approved for human use; some are investigational or sold through unregulated channels where purity and dosing are not guaranteed.