Acetyl L Carnitine Twinlab, Review, Customer Opinion and Analysis… We tell you everything!

Evaluation : 3.5/5. (2 reviews)

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twinlab-acetyl-l-carnitineVery often when we try to lose weight without obtaining the expected results, we can tend to want to accumulate products, creams, pills and programs of all kinds. Sometimes, however, it is enough to find the right substance which, on its own, can succeed in melting away the extra pounds. Twinlab touts the benefits of its ACETYL L CARNITINE supplement as an essential and essential fat carrier.

Let’s take a closer look to see if this product can actually be your future slimming ally.

Presentation and promises of Acetyl L Carnitine from Twinlab

Twinlab presents its Acetyl L Carnitine supplement as a powerful stimulant, especially in the event of prolonged effort.

This supplement would be very popular with athletes, but its multiple benefits will interest many other people:

  • Suppress the feeling of hunger;
  • Burn fat;
  • Increases athletic performance;
  • Accelerates recovery after physical activity;
  • Boosts energy levels.

Depending on your profile and your goal, Acetyl L Carnitine can be used in two different ways.
You are athletic and want to burn more fatbut also have better performance and better recovery: take 1 to 2g of Acetyl L Carnitine before and after your workout.

You are not particularly athletic, but want to lose weight : take 1 to 2g of Acetyl L Carnitine per day, preferably between meals, accompanied by a large glass of water.

Twinlab, the maker of the Acetyl L Carnitine supplement

twinlab-acetyl-l-carnitineYou don’t know Twinlab laboratories?
Well, as some would say, you live in a cave!

Indeed, the Belgian Twinlab laboratories have been active in the nutritional supplement market since 1967, and boast of being innovative, market leaders and of an unrivaled international reputation.

We checked, and it’s all true! The Twinlab company is recognized for its quality products in sports circles in particular, and demonstrates real seriousness in its overall approach.
The manufacturing and control processes are very strict, and the products are manufactured in laboratories belonging directly to the company.
Twinlab supplements are sold in 5 continents.

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So green light as far as the manufacturer is concerned!

Twinlab Acetyl L Carnitine Ingredients

As its name suggests, and unsurprisingly, the main ingredient is none other than ACETYL L CARNITINE.

Acetyl L Carnitine (or ALCAR) is a substance known since the 50s, and which became popular in the 80s for its fat burning properties.

More recent research has shown that in addition to the benefits of ALCAR for losing fat mass, this ingredient also has a positive effect on performance and recovery.

What is Acetyl L Carnitine?

Acetyl L Carnitine is a substance that is similar to amino acids and vitamins, without being one.
Close to group B vitamins, it was originally called vitamin BT.
ALCAR forms naturally in the body, in the liver and kidneys, from 2 amino acids: lysine and methionine. It is then stored in the muscles, primarily the heart, but also in the brain, and even in sperm in humans.

Acetyl L Carnitine is found in good quantities in meat and other animal products, as well as in lesser quantities, in avocados or soy.

There are several forms of carnitine:

  • D Carnitine, which is inactive and not sold as a supplement;
  • L Carnitine, which is the form of carnitine usually found in nature, and which is therefore biologically active;
  • Acetyl L Carnitine, which is also found in the Central Nervous System, and which plays a role in the production of energy, or the production of an essential neurotransmitter, acetylcholine.

What is the role of Acetyl L Carnitine in the body?

Acetyl L Carnitine participates in the transport of fats, and more specifically long-chain fatty acids, into the mitochondria of cells.
The fatty acids are then oxidized and used by the body as fuel, in the form of ATP.
This action is done both at rest and during the practice of a sport, and would also be more effective during intense sports practice.

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Acetyl L Carnitine also acts on insulin, increasing its influence on muscle cells. This will have the effect of better regulating the level of glucose in the blood.

Finally, Acetyl L Carnitine helps increase sports performance and reduce fatigue.
It is the increase in calorie burning, coupled with a decrease in the amount of glycogen used and an increase in blood supply to the muscles that allows the body to receive more nutrients and hormones to respond to his needs during the exercise.

ALCAR is also related to nitric oxide.
First, it reduces the oxidative damage of nitric oxide to the body.
Second, it increases the activity of a key enzyme involved in the production of nitric oxide. As a result, the ON level rises, causing a noticeable improvement in energy levels during exercise, but also in post-exercise recovery.

What does science say about Acetyl L Carnitine?

Acetyl L Carnitine has been widely studied and its properties are clearly recognized.

To concretely determine the benefits of this substance, we have chosen to mention a recent study that was carried out at the University of Notthingham Medical School.

This study focused on 2 groups of athletes:

Group 1 received in the morning on an empty stomach 2g of ALCAR + 80g of a food preparation based on carbohydrates (slow sugars) with a high glycemic index, then again 4 hours later.
Group 2 received only the carbohydrate preparation.

The results of this study are as follows:

  • During low-intensity exercise, athletes in group 1 burned 55% less muscle glycogen and 55% more body fat than group 2;
  • Group 1 had 25% longer exercise capacity than group 2;
  • Despite the 640 more calories provided by the carbohydrate preparation, the subjects in group 1 did not gain weight, while the individuals in group 2 gained more than 2.5 kg of fat mass.
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(Source : NCBI. PubMed. University of Leipzig, Children’s Hospital, Germany. Müller DM., Seim H., Kiess W., Löster H., Richter T. Metabolism. 2002 Nov; 51(11):1389-91).

These results clearly show the interest of Acetyl L Carnitine in burning fat and reducing fatigue.

Side effects of ALCAR

At normal doses, Acetyl L Carnitine has very few side effects.
In high doses, however, it can cause the following side effects: nausea, abdominal cramps, vomiting, diarrhea.
More rarely, it can cause muscle weakness in uraemic people, or convulsions in people with seizure disorders.

Finally, ALCAR also has, for men only, a rather pleasing side effect: that of increasing erectile function and fertility.

Twinlab Acetyl L Carnitine User Testimonials

Almost all users of ALCAR are unanimous: this ingredient is really effective.
Its effectiveness still seems largely optimized by following a specific diet.

ALCAR would refine the silhouette, help to lose weight, and effectively boost energy levels.

Price and guarantee of Acetyl L Carnitine from Twinlab

Acetyl L Carnitine from Twinlab Laboratories is available on most online sports nutrition sites.
Count approximately 25€ for a bottle of 30 capsules of 500mg each.

There is no money back guarantee for this supplement.

Alternative to Acetyl L Carnitine

If you want to consult another test about an effective and serious slimming solution, I advise you to review the article below:


“PhenQ” is a slimming tablet that combines the positive slimming effects of several dietary supplements to achieve optimal weight loss!

See the analysis and testimonials on PhenQ!

Last update: September 14, 2022.