Best L-carnitine Supplements For Weight Loss And Building Lean Muscles

Summary:  What is L-carnitine? What are its benefits? Read on and find out the best L-carnitine supplements for weight loss!


L Carnitine

You’ve probably heard about L-Carnitine for weight loss. Briefly, L-carnitine is an amino acid and antioxidant, which is naturally produced in the body, and it helps us in converting fat into energy.

So with loads of it, we can do more out of life because it supplies us with fuel to keep up with our workout, let’s say.

But while it’s naturally abundant, some people suffering from a genetic disorder, undergoing hemodialysis or are taking medications, including those containing valproic acid for seizure, its level is generally low among them.

Now if you want to learn more about the benefits of supplementing with it, when to take it and its side effects, read on.

What Are Benefits Of L-Carnitine?

Fat Burning

Fit Girl

It helps in burning fat for fuel, as mentioned earlier. And with an increase of it in your muscles, the amount of fat that you can burn will increase, too. It works by transferring long-chain fatty acids into the mitochondria so that they can be oxidized to produce energy.In short, L-carnitine can help you prevent fat accumulation and storage and increase your aerobic capacity for fat burning.

Muscle Mass

Back Muscle

Are you a hard gainer? Then, you might not have to look farther to pack on muscle but you might want to consider supplementing with it to increase strength and stamina when using heavier weights.

Immune System Strengthening

Immune System

Because L-carnitine is an antioxidant, it can effectively help you prevent free radical damage, especially helpful if you’re training and dealing with seasonal allergies.

Appetite Suppression

Appetite Suppressants

If you’re trying to lose weight, L-carnitine might also be for you because it can suppress the appetite, meaning no more hunger pangs that can ruin your diet.

Bone Mass

Woman runs

Cardio workouts, such as marathons, can take a toll on your bones. So if you’re trying to lose weight through it, you might want to consider taking L-carnitine supplements that can assist in slowing down bone loss, while at the same time enhance its micro structural properties through reducing turnover.

Brain Function

Brain Function

Strenuous workouts, let’s say, might impair the brain in the end, but L-carnitine can help you prevent it. Studies had it that it can protect the brain from both stress and age related damage so that it can function better, longer.

Fatigue Reduction

Muscle Mass

L-carnitine can reduce fatigue, something vital in weight lifting. So if you want to keep that energy level to complete your reps and set, then consider supplementing with it.

Best Time To Take L-Carnitine

Best Time To Take L-Carnitine
  • When should you take L-carnitine for weight loss? Take it with your largest meal of the day.
  • But if you’re supplementing for performance, muscle growth and recovery, you should take it before and after training.

For the best results, you might want to take it along with insulin spiking carbohydrate supplements, such as waxy maize, to ensure that L-carnitine will be saturated in your muscle cells.

L Carnitine Side Effects

Physical Stamina

The supplement is safe for most people but with prior green light from their doctor.

A few known side effects include diarrhea, heartburn, upset stomach, vomiting, nausea or seizure. It might also make your sweat, breath and urine ‘fishy’ in odor.

Now that we know the awesome list of its benefits and the common side effects, let’s now go over to the top 5 best L-carnitine supplements for weight loss.

5 Best L- Carnitine Supplements For Weight Loss

**Below, you'll see more detailed reviews, but you can also click the links above to see current prices and read customer's reviews on Amazon.com.

1. BulkSupplements Pure L-Carnitine Powder

BulkSupplements Pure L-Carnitine Powder

via Amazon.com

Carnitine is the chief amino acid that helps the body convert fats into energy. It is considered conditionally essential, meaning that there are certain conditions a person can undergo which might make supplementation or dietary changes necessary to keep up Carnitine levels.

Bulk Supplements gives you the best and highest quality of L-carnitine powder.


  • Cheap
  • Pure powder
  • Pure carnitine
  • Easily mixed
  • Highest rated on Amazon


  • Some are complaining about bad smell
  • Some stomach upsets

2. NOW Foods L- Carnitine

NOW Foods L- Carnitine Tartrate

via Amazon.com

L-Carnitine is a non-essential amino acid that helps to maintain overall good health by facilitating the transfer of fatty acid groups into the mitochondrial membrane for cellular energy production. *It naturally occurs in red meat and other animal source foods, but we recommend supplementation to obtain optimal levels of this excellent amino acid. NOW® L-Carnitine is the purest form, clinically tested, and vegetarian (non-animal sourced).

Contains no: sugar, salt, starch, yeast, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives.

Pure L-Carnitine is an amino acid that normally attracts water which can cause it to deteriorate rapidly. We use a tartrate form to help ensure that this product maintains stability and full potency.


  • Purest form
  • Uses tartrate form to maintain stability and potency
  • Great customer reviews
  • NOW is a reputable brand


  • Tablet form and no powder form
  • Some having sleep issues, headaches, and diarrhea with it

3. BRI Nutrition L-carnitine

BRI Nutrition L-Carnitine

via Amazon.com

We noticed that most Carnitine supplements were so large they'd be difficult for most anyone to swallow; that's why we took the same effective amino acid and broke it down into two easy-to-swallow capsules. As one of the most studied amino acids, Carnitine has been found to improve kidney function, speed up metabolism and impart energy, making it an ideal supplement for those looking to lose a few pounds while maintaining high energy levels all day long. it's no wonder that L-Carnitine is gaining in popularity as a supplement for people who want to promote heart health and lose weight at the same time.


  • Uses tartrate form for potency
  • Purest form
  • ​Capsule form -- easy to swallow
  • ​Great reviews on Amazon


  • No powder form
  • Have to take 2 capsules to get 1000mg
  • Many have reported about the smell

4. Optimum Nutrition L-Carnitine

Optimum Nutrition L-Carnitine

via Amazon.com

L-Carnitine is an important amino acid that can help transport fat to the muscle to be burned as energy.

  • In promoting better utilization of body fat, it may aid in weight loss and improve athletic performance.
  • ​Clinical research has also suggested L-Carnitine supports athletic performance in endurance athletes.
  • ​L-Carnitine plays a crucial role in cardiovascular metabolism and weight management.
  • Whether you use L-Carnitine for the health of your heart, endurance, or fat loss support, you can be sure you are getting quality with Optimum Nutrition's L-Carnitine.


  • Optimum Nutrition has a reputable image
  • Purest quality
  • Has calcium and phosporus


  • More expensive
  • No powder form

5. EverPure L-Carnitine

EverPure L-Carnitine Tartrate

via Amazon.com

Everpure Labs is a company that was built by Health conscious consumers for health conscious consumers.

L-Carnitine as been proposed as a treatment for any conditions because of its powerful anti-oxidant properties. Antioxidants fight harmful particles in the body known as free radicals, which damage cells and tamper with DNA. Antioxidants can neutralize free radicals and may reduce or help prevent some of the damage they cause.


  • Uses tartrate form for maximum potency
  • Good amazon reviews
  • Pure form
  • Vegetarian capsules


  • No powder form

Summing Up

L-carnitine for weight loss (or muscle growth, performance and recovery) may be for you if you’re generally healthy, but be sure to consult your doctor prior to supplementation for safety.

Finally, follow the label instructions for proper dosage and usage for the best results.

Did you find this article helpful? Hit share and like, and let us know your thoughts in the comment section below.


  • www.bodybuilding.com
  • www.livestrong.com
  • www.nutritionexpress.com
  • muscle-insider.com
  • www.webmd.com
  • www.bulksupplements.com
  • www.nowfoods.com
  • www.brinutrition.com
  • www.optimumnutrition.com
  • www.sportsnutritionguys.com
Click Here to Leave a Comment Below 4 comments