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Acetyl-L-carnitine

Also called: ALCAR, ALC, acetylcarnitine

A form of carnitine, which helps cells turn fat into energy. This form reaches the brain and nerves, so it's often used for nerve and brain support.

Medical Disclaimer

Supplements can interact with medications and aren't right for everyone, especially during pregnancy or breastfeeding, or with a chronic condition. Ask your provider before you start.

Studied for

  • Nerve pain and tingling, such as diabetic neuropathy (some studies)
  • Mental fatigue and focus
  • Low mood, especially in older adults (some studies)
  • Sperm movement and male fertility (some studies)

Found naturally in

  • Your body makes carnitine
  • Red meat, especially beef
  • Pork and chicken
  • Fish and milk
  • Very little in plant foods
What variations of acetyl-L-carnitine exist?Pick by goal: focus & memory, nerve support, energy

Label red flags

  • Lists 'carnitine' without saying which form
  • Contains D- or DL-carnitine

Check with a provider

  • Thyroid disease or taking thyroid medicine. Carnitine may make thyroid hormone less active.
  • Taking warfarin or other blood thinners
  • Seizure disorder
  • Pregnancy or breastfeeding
  • Stomach upset or a fishy body odor can happen at higher doses

Supplements that contain it

One product in the Lesher Wellness store lists acetyl-l-carnitine on the label.

Dr. Lesher, ND

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