L-Carnitine (200 mg Vial) Dosage Protocol
L-Carnitine is an amino acid derivative essential for fatty acid transport into mitochondria for β-oxidation. Subcutaneous administration bypasses intestinal conversion to TMAO (linked to cardiovascular risk) and provides 100% bioavailability compared to 5–18% for oral dosing.
⚡ Quickstart Highlights
Dosing & Reconstitution Guide
Route: Subcutaneous | Frequency: Once daily | Half-life: ~15 hours
Standard Approach (2 mL = 100.00 mg/mL)
Reconstituting with 2 mL bacteriostatic water produces a concentration of 100.00 mg/mL. Volume per dose changes with concentration; mg dose itself does not change between vial sizes.
| Phase / Protocol | Dose | U-100 Units | Volume | Doses per vial |
|---|---|---|---|---|
| Weeks 1–2 (titration) | 50 mg | 50 units | 0.50 mL | 4 doses |
| Weeks 3–12 (target) | 100 mg | 100 units | 1.00 mL | 2 doses |
| Advanced (optional) | 200 mg | 200 units | 2.00 mL | 1 doses |
Reconstitution Steps
- Wipe the vial stopper and BAC water vial with alcohol; let dry.
- Draw 2 mL of bacteriostatic water into a sterile syringe.
- Inject slowly down the inside glass wall of the peptide vial. Do not aim at the powder.
- Gently swirl until fully dissolved. Do not shake.
- Label with reconstitution date. Refrigerate at 2–8°C; use within 28 days.
Supplies Needed
Estimates for an 8-week and 12-week cycle at 100 mg per dose, once daily (7 doses/week).
| Item | 8-Week Cycle | 12-Week Cycle |
|---|---|---|
| L-Carnitine (200 mg) vials | 28 vials | 42 vials |
| Insulin syringes (U-100) | 56 | 84 |
| Bacteriostatic water (10 mL) | 6 × 10 mL | 9 × 10 mL |
| Alcohol swabs | 1 × 100-pack | 2 × 100-pack |
Protocol Overview
L-Carnitine is essential for mitochondrial fatty acid transport. Subcutaneous administration provides 100% bioavailability (vs. 5–18% oral) and bypasses gut bacterial conversion to TMAO, a metabolite associated with cardiovascular risk in oral protocols.
Meta-analysis of 37 RCTs shows modest weight-loss effects (~1.2 kg average) at ~2,000 mg/day oral, with diminishing returns above that dose. Parenteral dosing has an excellent safety margin — human protocols have used up to 50 mg/kg IV daily.
Dosing Protocol
Daily titration (subcutaneous):
- Weeks 1–2 (titration): 50 mg/day. Assess injection-site tolerance.
- Weeks 3–12 (target): 100 mg/day. 100 mg = 1.0 mL exactly at 100 mg/mL concentration.
- Advanced (optional): Up to 200 mg/day for robust experimental protocols. Split into 2 injections at different sites.
Cycle: 8–12 weeks; optional extension to 16 weeks.
Timing: Once daily at any consistent time; morning or pre-exercise commonly used.
Comfort tips: Warm vial to room temperature before injection. Volumes >1 mL: split into 2 injections.
Storage Instructions
| State | Temperature | Duration |
|---|---|---|
| Lyophilized | −20°C (−4°F) | Up to 24 months, dry & dark |
| Reconstituted | 2–8°C (35–46°F) | Up to 28 days, protect from light |
Important Notes
How This Works
L-Carnitine acts as an obligate cofactor for the carnitine palmitoyltransferase (CPT) enzyme system, which shuttles long-chain fatty acids across the inner mitochondrial membrane for β-oxidation and ATP production. Subcutaneous route bypasses gut bacterial conversion to trimethylamine-N-oxide (TMAO), the metabolite linked to elevated cardiovascular risk with oral dosing.
Potential Benefits & Side Effects
Potential Benefits
- Enhanced mitochondrial fatty acid oxidation.
- Modest weight loss in meta-analysis (~1.2 kg).
- Reduced fatigue in dialysis populations.
- Bypasses TMAO production associated with oral dosing.
- Well-tolerated at parenteral doses up to 50 mg/kg IV daily.
Side Effect Profile
- Mild injection-site reactions (typically transient).
- Oral high doses (>3 g) cause fishy body odor — subcutaneous minimizes this.
Lifestyle Factors
- Protein-forward diet with adequate lysine and methionine.
- Combine resistance + aerobic training for fat oxidation synergy.
- Modest caloric deficit (300–500 kcal/day) for fat-loss goals.
Injection Technique
- Subcutaneous, rotate sites.
- Warm vial to room temp before injection to reduce pain.
- Volumes >1 mL: split into 2 injections.