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

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

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$0.16/Veggie Caps
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Doctor's Best, Acetyl-L-Carnitine, 500 mg, 120 Veggie Caps

In Stock
  • Expiration Date: January 2019
  • Shipping Weight:
    0.35 lbs
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  • 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
    Switch to Metric units

Product Rank:

#40 in Sports >
Frequently Purchased Together
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.


While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
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

Don't feel any different

Posted by iHerb Customer on March 10 2018 | Verified Purchase

I don't feel different at all between don't use this product and use this product before exercise for 1 hour.

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good for energy

Posted by Suppster on February 2 2018 | Verified Purchase

I take this with ribose and rhodiola if I need extra energy (I cant tolerate caffeine of coffee)

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Side effect

Posted by iHerb Customer on January 16 2018 | Verified Purchase

It has an effect on brain activity which I do not like. I do not know how exactly it is supposed to work, I am a weight lifter and took the product in order to improve my metabolism and nerveous system but it makes my brain function slower than it is, and my speech comes out in a weird dyslexic way for two weeks now. So far, I am happy with my metabolism but not happy with the side effects and I will no longer use it.

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Posted by iHerb Customer on January 2 2018 | Verified Purchase

This is a Nutrient that occurs Naturally in the Body, and is Important for ENERGY in our Cells---It is a Protective Nutrient for the Nervous System! It does Generate Energy from Food, and even Helps Promote a Healthy MOOD!

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High quality, efficient, but watch your stomach.

Posted by Antonych on December 15 2017 | Verified Purchase

Hi! I do water sports professionally and bought it to increase the time of my training session. I've chosen it, because it has a "BIOSINT" label on the bottle, meaning that high quality L-Carnitin from Sigma-Tau was used. The second world producer is a Swiss brand Lonza with "Carnipure" L-Carnitine. Was taking it right before going out on the water for max. effect. Sometimes, instead of taking a capsule, I was opening it and dissolving the powder in the water for faster absorption (my stomach also does not like pills too much and sometimes hurts). I also didn't mix it with any meals to eliminate additional energy sources and make the fat-burning function of L-Carnitine more efficient. Results. I've noticed, that I have more energy and get hungry slower, if compared to a normal session. Had a feeling of better concentration as well. However, after taking it several days in a row, I've noticed increasing acidity in the stomach, resulting in a feeling of pyrosis. No wonder, the powder itself is extremely sour. But it is also a result of using a harness (a special belt for kitesurfing) pulling me up and compressing my stomach. Haven't noticed any "pyrosis" or heartburn feeling while practicing non-water sport activities though. Nevertheless, pay attention, if you tend to have a high stomach acidity. Check out my personal page for more info on using iherb products to get better sport results. Don't forget to hit the "like" button if it was useful for you. Thanks for reading!

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