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Doctor's Best, Best Acetyl-L-Carnitine HCl, 588 mg, 60 Veggie Caps

By Doctor's Best

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  • Product Code: DRB-00105
  • UPC Code: 753950001053
  • Package Quantity: 60 Veggie Caps
  • Dimensions: 2.1 x 2.1 x 3.8 in, 0.15 lbs (0.07 kg)
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Product Overview

  • Science-Based Nutrition
  • Dietary Supplement
  • Biosint Carnitines
  • Featuring Sigma Tau Carnitine
  • Enhances Alertness & Mental Focus

Acetyl-L-Carnitine (ALC) is a naturally occurring form of L-Carnitine, a vitamin-like nutrient synthesized in the body, from the amino acids lysine and methionine. ALC plays a key role in the production of acetylcholine, an important neurotransmitter for brain and nerve cell function.

The Sigma tau supplied Acetyl-L-Carnitine in this product is derived from a base of pharmaceutical grade L-Carnitine manufactured by patented, FDA-approved process that fully complies with USP, FCC and EU monographs. It is pesticide-free and BSE safe.

  • Supports energy metabolism in the brain
  • Keeps nerves healthy and in repair
  • Decreases free radical production in the brain
Suggested Use

Adult Use: Take 1 to 4 capsules daily with or without food. Higher intakes may be beneficial, as recommended by a nutritionally-informed physician.

Other Ingredients

Stearic acid, cellulose, magnesium silicate, silicon dioxide, modified cellulose (vegetarian capsule).

Non-GMO and Gluten Free

Contains nothing other than listed ingredients.


Individuals with thyroid problems or on anticoagulant therapy should consult their physician before using this product.

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Supplement Facts
Serving Size: 1 capsule
Servings per container: 60 servings
  Amount Per Serving: % Daily Value
(from 588 mg acetyl-l-carnitine HCI supplied by Sigma tau)
500 mg
†Daily Value not established.

iHerb Customer Reviews

5 Stars
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Posted by TinVal on Aug 26, 2012

Another good product at excellent price. This was the first ALCAR supplement I bought. - - - - - - - - - - - - It is extremely safe(Carnitine supplementation has an excellent safety record. Doses of 2-6 grams per day over a period of 6 months have been studied with no observed adverse side effects.) and the benefits are numerous - Acetyl-L-carnitine is a precursor of acetylcholine and improves cognitive performance, ameliorates age-related deficits, preserves, at least partially, learning and memory from the natural decay occurring with age, rescues aged neurons by increasing their responsiveness to neuronotrophic factors in the CNS and lot more.... Recommend this product. 5 stars.

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25 people found the following review helpful

Helps Increase My Energy

Posted by Reviewer1928349 on Aug 12, 2009

I am already taking B12, iodine, and a B-complex for very low energy. Within a few days of adding 1000mg (2 capsules) of this acetyl-l-carnitine in the morning, my energy starting improving. If I also take 500mg in the afternoon, mu fatigue is even less.

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6 people found the following review helpful

Works for me

Posted by Reviewer3156794 on Dec 11, 2008

I read that Acetyl-L-Carnitine was one of the most health beneficial things you can put in your body. I feel great since I've been taking it.

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6 people found the following review helpful

Remedy for fatigue

Posted by Reviewer1030461 on Jan 05, 2009

Firstly thanks to the iHerb team for maintaining an excellent and objective collection of recent scientific evidence for "herbs and supplements". For L-carnitine I can add another review written by JD Harris in Current Opinion in Supportive and Palliative Care in 2008, titled "Fatigue in chronically ill patients". He writes "..Among complementary therapies, L-carnitine has the most potential..". And I agree, taking 500mg of this together with one capsule of Glycine Propionyl L-carnitine(Source Naturals) has made my daily fatigue disappear. However, I don't reccomend taking it in the evening since it seems to interfere a bit with sleep initiation.

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6 people found the following review helpful

The Tingling is gone.

Posted by iJenNZ on Aug 13, 2012

I started taking this product as it is one of the supplements recommended to help down regulate the NO/ONOO- cycle which is said to be at the root of the symptoms of the Multi System Illnesses such as Chronic Fatigue Syndrome, Fibromyalgia and Multiple Chemical Sensitivity. (Google, Martin Pall PhD, for more details). The combination of supplements I am taking is definitely helping with the Chemical Sensitivities but an unexpected side effect is that it has eliminated the tingling and numbness in my hands and arms at night which was caused by Ulna Nerve Compression. I no longer have to spend time when I wake up in the morning moving and flexing hand and arm muscles to get the feeling back.

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12 people found the following review helpful

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