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Doctor's Best, Acetyl-L-Carnitine, 500 mg, 120 Veggie Caps

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In Stock
  • Expiration Date: Jan 2019
  • Shipping Weight: 0.35 lbs (0.16 kg)
  • Product Code: DRB-00152
  • UPC Code: 753950001527
  • Package Quantity: 120 Veggie Caps
  • Dimensions: 4.4 x 2.5 x 2.5 in, 0.3 lbs (0.14 kg)
  • Positively the best value in the world for certified Sigma Tau (Italian made) Acetyl L-Carnitine!
Product Overview


  • Science-Based Nutrition
  • Dietary Supplement
  • Biosint Carnitines
  • Helps Promote Healthy Mood
  • Non-GMO and Gluten Free

Acetyl-L-Carnitine (ALC) is a nutrient that occurs naturally in the body and is fundamentally important for energy generation by the mitochondria "energy factories" in our cells. The acetyl part of the molecule can be used to make acetylcholine, a key chemical messenger in the brain and all the other organs. ALC also is involved in regulating gene activity (epigenetics) and is a versatile protective nutrients for the nervous system.

  • Essential for generating energy from foods
  • Helps preserve nerve structure and function
  • Helps promote healthy mood.

Suggested Use

Take 2 capsules per day with meals. For additional benefit take 4 capsules per day, or more, as recommended by a nutritionally-informed physician.

Other Ingredients

Modified cellulose (vegetarian capsule), magnesium silicate, microcrystalline cellulose, silicon dioxide, stearic acid.

Non-GMO and gluten free


Store in a cool dry place.

Supplement Facts
Serving Size: 2 capsules
Servings Per Container: 60 servings
  Amount Per Serving % Daily Value
Acetyl-L-Carnitine (from Biosint Acetyl-L-Carnitine HCI) 1000 mg
† Daily Value not established.
iHerb Customer Reviews

This is amazing stuff

Posted by FrogPrincess on Dec 13, 2016

A few years ago I got hold of a tonic with ALCAR, arginine and, I think, CoQ10 (but I'm not sure) as active ingredients. The stuff was brilliant, and I felt like a good and happy person when I took it. Then the formulation changed or something, and I stopped taking it. I didn't find out until recently that it was almost certainly the ALCAR that was causing the positive effects. Now it's a staple of my stack. I don't need much but I do need it, and when I have it I have energy, peace of mind, clarity and general good humour. It really is amazing. I feel ALCAR to my husband and his bad temper doesn't happen anymore. I've given it to friends whose children have fibromyalgia symptoms, and their kids have improved. ALCAR, pterostilbene, CoQ10, citicoline, Niagen and tiny amounts of PQQ with NAC are keeping me yopunger than I should be. Don't know what I'd do if I couldn't get them.

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For a friend

Posted by 4843708942456877420 on Dec 03, 2016

Was for a friend

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before sports

Posted by 5594405102197242937 on Dec 02, 2016

keeps me fresh during activity and after

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Definitely helps maintaining intensive workouts

Posted by Reviewer1716662 on Nov 18, 2016

I stopped taking it after I heard it may slow down a thyroid. Before I used to take it with my espresso in advance of a high intense workout. Yes, coffee was taken to improve stamina, too. I felt so much better, I couldn't stop running or making circles on an elliptic machine after more than an hour of high tempo. In all other situations coffee doesn't contribute to my energy level (I sometimes take it before bed), so it was a great combo.

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Great little Amino

Posted by 5552397129101064109 on Sep 28, 2016

Great for a mental hangover, whenever I used to drink alcohol I would have a few days following where my brain just did not work right/feel right which could last for an entire week, now I just take a few of these before I have a drink and at the end of the night and they have pretty much eliminated the alcohol related brain fog... now I just need to find something for my general non alcohol brain fog :).

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