L-Carnitine (injectable)

L-carnitine is an endogenous amino-acid derivative essential for fatty-acid oxidation. Oral absorption tops out around 18%, which is why injectable forms are used when therapeutic plasma levels are the goal. Clinical use includes carnitine deficiency, dialysis-related deficiency, and adjunctive endurance/recovery work.

Shuttles long-chain fatty acids across the inner mitochondrial membrane for β-oxidation. Injectable form bypasses oral absorption ceiling.

• Energy

  Energy & Mitochondrial Output

  Improves fatty-acid utilization at the mitochondrial level.

  STRENGTH

  70%
• Fat loss

  Fat Loss & Body Composition

  Modest effect on body composition when combined with training.

  STRENGTH

  55%
• Recovery

  Recovery & Tissue Repair

  Reduces post-exercise muscle damage markers in some trials.

  STRENGTH

  50%

Generally safe. High doses can cause fishy body odor (TMAO production) and mild GI upset.

• Seizure disorder (relative)
• Hypothyroidism (monitor)

FDA-approved (Carnitor) for carnitine deficiency. Off-label otherwise.