6 Best L-Carnitine Supplements For Athletes, Fat Burn, And More.

Carnitine supplements are quite sought after as they assist in weight loss. They work as an excellent metabolism booster and enhance athletic performance.

best carnitine supplement

Carnitine is an ammonium compound produced by the liver and kidneys. It serves as a transporter of long-chain fatty acids into the mitochondria to be oxidized for energy production and therefore plays a key role in the regulation of lipid metabolism.

Accordingly, both scientists and sports nutritionists alike have entertained the notion that supplementation could increase the bioavailability of carnitine and enhance the overall capacity for lipid metabolism.

Animal food products like fish and meat are also rich sources of L-carnitine. The name L-carnitine is derived from the Latin word ‘carnis,’ which means meat.

Our body produces L-carnitine and stores it in our muscles and heart tissue, individuals may suffer from a deficiency like vegans, those under undue stress or anxiety, or those with specific genetic issues.

With so many products flooding the supplement industry, it is obvious to get confused while picking the right one for you. Let make us assist you to pick and choose the right one.

Best Carnitine Supplements

We put hours of research and expert interviews to bring you the 6 best carnitine supplements that help you with weight or fat loss.

1. Kaged Muscle-L-Carnitine

best l carnitine supplement

Kaged L-Carnitine uses a pure, patented form proven to reduce muscle soreness so you can train harder, recover faster, and burn fat as fuel.

A single bottle contains 250 capsules, and each capsule provides 500mg of L-carnitine. This product is also GMO-free and vegetarian as well, the pill capsule is made from vegetable cellulose. The price is quite reasonable as compared to the other carnitine products on the market.

Kaged recommends taking two capsules, three times per day on an empty stomach. When working out, take the capsules 30 to 60 minutes before training. 


  • Doesn’t contain any extra ingredients
  • Vegetable cellulose
  • Reasonable Price

2. ProSupps L-Carnitine

best l carnitine supplement

ProSupps L-Carnitine provides consumers with a great-tasting, sugar-free, calorie-free, and convenient way of supplementing with L-Carnitine and Pantothenic acid.

This product helps support the body’s ability to transport fatty acids into the mitochondria of cells, translating to increased natural energy production, promoting exercise recovery, supporting exercise performance, and boosting cellular efficiency.

ProSupps L-Carnitine is ideal for anyone looking for a sugar-free way of boosting their natural energy production and recovering better from exercise.† Flip the switch, naturally.

As a dietary supplement, consume one tablespoon of L-Carnitine twice daily or as directed by a physician or licensed nutritionist. You may also mix it with your favorite juice or beverage.

You’ll receive 31 servings per bottle, each providing you with 3000mg of l carnitine and 10mg of pantothenic acid. Pantothenic acid helps the body utilize carbohydrates, proteins, and lipids. It is also important for maintaining healthy skin.


  • The person who wants the supplement in liquid foam rather than powder or tablet-then, it is for you.
  • Promotes thermogenesis
  • Promotes natural energy production
  • Great tasting flavors
  • Stimulant-free

3. Transparent Labs Fat Burner Stim-Free

l carnitine to buy

Transparent labs come with a unique combination of clean and natural fat-burning ingredients, PhysiqueSeries Fat Burner Stim-Free is perfect for anyone intolerant to stimulants looking to optimize their fat loss efforts.

This product contains 750mg of acetyl l-carnitine, which may make fat more easily available to be burned. It also contains forslean and cayenne pepper ingredients that put a major role in burning fat and increasing metabolism in our body. When these ingredients burn unwanted fat the body feels energetic during a workout instead of dull.

This product is packaged in capsules with a recommended serving size of two capsules twice daily, both times 30 to 60 minutes before a meal.


  • Free of Caffeine
  • No artificial sweeteners or coloring
  • Gluten-free and non-GMO
  • Also, include forslean and cayenne pepper ingredients


  • Only available on its brand page.

4. Optimum Nutrition L-Carnitine

best l carnitine to take

If you are looking for an overall L-carnitine supplement that takes good care of your metabolism, bones, muscles, and budget, Optimum Nutrition L-carnitine should be the best one you can have.

It also included ingredients like calcium and phosphorus to make your bones ready to support you while you lift heavier weights.

The box contains 60 servings tablets, wherein each tablet contains 500mg of l-carnitine, 95mg of calcium, and 75mg of phosphorus.

The company researches say, to consume one tablet before meals once or twice a day.


  • An added advantage of calcium and phosphorus
  • Relatively less expensive in spite of the additional minerals
  • Enhances bone strength

5. Nutricost Acetyl L-Carnitine (ALCAR)

Nutricost Acetyl L-Carnitine

Nutricost provides some of the best supplements on the market. A big standout is that the product is third-party tested, plus one little tub provides a considerable 500 servings of one gram each. This pure acetyl l-carnitine product provides 1,00mg of ALCAR per scoop, allowing you to modify the amount you take easily either up or down.

Acetyl l-carnitine may cross the blood-brain barrier more effectively than l-carnitine. ALCAR or acetyl L-carnitine is another form of L-carnitine. Both forms can increase exercise performance and the fat-burning process, thereby assisting in losing body weight.


  • Third-party tested.
  • Provide pure carnitine, with no other ingredients, are contained in it.
  • Non-GMO and Gluten Free


  • The strong sour taste of pure carnitine.

6. Arazo Nutrition L-Carnitine

best l carnitine capsule

Arazo Nutrition uses cutting-edge scientific research to help you get the most out of your nutrition. Their team of doctors, health specialists, and medical professionals has been providing industry-best products for more than ten years. They are driven by the desire to bring high-quality, low-cost supplies to everyone who wants them.

It also provides 330mg of Calcium per serving and greatly boosts metabolic rate, muscle strength, and bone health. Added Calcium boosts results when combined with L-Carnitine.

This US-based company uses only non-GMO products and focuses on producing affordable supplements and uncompromised quality.

Super Strength L-carnitine provides a serving size of 2 tablets and one container is equivalent to 60 servings. One serving is supposed to be taken once or twice a day or as directed by your physician.


  • Calcium-enhanced super formula
  • Supports athletic performance and stamina
  • Burn fat to help lose weight
  • FDA-approved laboratory that is GMP-certified
  • Tested by a third party for purity


  • The bottles hold fewer servings than other popular brands
  • The main label does not mention L-carnitine tartrate, but it is properly listed on the back label as the main ingredient.

Benefits of Carnitine

There is no doubt L-carnitine is the best supplement to burn body fat. But, it does not stop here, it covers all body fat into energy. As your body’s capacity for fat-burning rises, so does your energy level. L-carnitine not only helps you increase the amount of fat burned with every workout, but you also get more energy for better workouts and an active lifestyle. Take a gaze below at some benefits of L-Carnitine Supplement:-

Help to Loss Weight:

L-carnitine’s main role in your body involves mitochondrial function and energy production. In cells, it helps transport fatty acids into the mitochondria, where they can be burned for energy.

Since L-carnitine helps move more fatty acids into your cells to be burned for energy, you might think this would increase your ability to burn fat and lose weight.

Improve Heart Health:

L-carnitine is also linked to improvements in patients with severe heart disorders, such as coronary heart disease and chronic heart failure.

In one study, 2 grams of acetyl-L-carnitine per day resulted in an almost 10-point drop in systolic blood pressure — the top number of a blood pressure reading and an important indicator of heart health and disease risk.

Increase Athletic Performance:

The evidence is mixed when it comes to L-carnitine’s effects on sports performance.

However, several studies note mild benefits associated with larger or more long-term doses.

L-carnitine may benefit:

  • Recovery: May improve exercise recovery.
  • Muscle oxygen supply: This may increase the oxygen supply to your muscles.
  • Stamina: May increase blood flow and nitric oxide production, helping delay discomfort and reduce fatigue.
  • Muscle soreness: May reduce muscle soreness after exercise.
  • Red blood cell production: May increase the production of red blood cells, which transport oxygen throughout your body and muscles.

Side Effects

L-carnitine is safe like other supplements. But high dosage can cause side effects such as stomach upset, heartburn, diarrhea, and seizures. It can also cause urine, breath, and sweat to have a “fishy” odor. Avoid using D-carnitine and DL-carnitine. These forms of carnitine might block the effects of L-carnitine and cause symptoms that resemble L-carnitine deficiency.

Recommended Dosage

L-carnitine has most often been used by adults in doses of 2 grams by mouth daily. In children, L-carnitine has most often been used in doses of 50-100 mg/kg by mouth daily, for up to one year. Speak with a healthcare provider to find out what dose might be best for a specific condition.

When is the best time to take L-carnitine?

As suggested by medical experts and bodybuilders, the best time to take L-carnitine is after a workout. You should be careful if you want to stack L-carnitine with other fat-burning supplements. In this case, it is best to take the acetyl-L-carnitine form of it.