L-Carnitine

L-carnitine is a nutrient that carries fatty acids into the mitochondria, where they are burned for energy. It supports healthy energy production, fat metabolism and exercise recovery.

This collection includes L-carnitine, acetyl-L-carnitine (ALCAR) and carnitine combination formulas from Klaire Labs, Thorne, Pure Encapsulations, Integrative Therapeutics, NutriDyn and more.

L-Carnitine vs Acetyl-L-Carnitine

• L-carnitine: The standard form, chosen to support energy production, fat metabolism and exercise recovery.
• Acetyl-L-carnitine (ALCAR): A form that reaches the brain, often chosen for memory, focus and mental energy.
• Liquids: Easy to dose and convenient for larger amounts.
• Combination formulas: Carnitine paired with CoQ10, chromium or alpha lipoic acid for broader energy and metabolism support.

Carnitine is often part of an energy routine with CoQ10 and B vitamins, or a training routine with creatine.

Frequently Asked Questions

What is the difference between L-carnitine and acetyl-L-carnitine?

Acetyl-L-carnitine reaches the brain more easily. L-carnitine is usually chosen for energy and exercise, while acetyl-L-carnitine is chosen for memory, focus and mental energy.

How much L-carnitine should I take?

Most products provide 500 to 2,000 mg per day. Follow the label or your practitioner's guidance.

When is the best time to take L-carnitine?

Many people take it in the morning or before exercise. Taking it with a meal can support comfort.

Who might consider L-carnitine?

People focused on energy, exercise and healthy aging often use it. Your body makes some carnitine, and it is also found in red meat, so people who eat little meat sometimes supplement.

Related categories: Energy & Stamina | CoQ10 | Brain Health & Memory | Metabolism Support | Amino Acids

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.