Best L-Carnitine Weight Loss Supplements of 2025

Bonnie Salem Avatar
Bonnie Salem
Last Updated: Jan 4, 2025

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L-Carnitine is a popular weight loss supplement that has gained a lot of attention in recent years. This amino acid is naturally produced in the body and helps to transport fatty acids into the mitochondria, where they can be burned for energy. L-Carnitine supplements are believed to boost metabolism, increase energy levels, and aid in weight loss. They are available in various forms, including capsules, tablets, and liquids, and can be found at most health food stores. While L-Carnitine supplements are generally safe, it is always important to consult with a healthcare professional before starting any new supplement regimen.

At a Glance: Our Top Picks

NOW L-Carnitine Supplements Cover #TOP 1
NOW L-Carnitine Supplements
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Nutricost Acetyl L-Carnitine Capsules - High Quality Energy Supplement Cover #TOP 2
Nutricost Acetyl L-Carnitine Capsules - High Quality Energy Supplement
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Burn-XT Fat Burner Cover #TOP 3
Burn-XT Fat Burner
ftb score rating icon 9.5

Top 10 L-Carnitine Weight Loss Supplements

NOW L-Carnitine Supplements

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NOW Foods Supplements, L-Carnitine 1,000 mg, Purest Form, Amino Acid, Fitness Support*, 100 Tablets

NOW L-Carnitine 1,000 mg tablets offer fitness support by boosting cellular energy and transporting fatty acids. It is a non-essential amino acid that helps to maintain overall good health. The product is non-GMO, Kosher, Soy Free, Vegan/Vegetarian and manufactured under GMP Quality Assured standards. The supplement is packaged in the USA by a family-owned and operated company since 1968.

What We Like
Purest form and clinically tested
Facilitates the transfer of fatty acid groups into the mitochondrial membrane for cellular energy production
Non-GMO, Kosher, Soy Free, Vegan/Vegetarian

Nutricost Acetyl L-Carnitine Capsules - High Quality Energy Supplement

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Nutricost Acetyl L-Carnitine Capsules - High Quality Energy Supplement Cover
Nutricost Acetyl L-Carnitine 500mg, 180 Capsules - Non-GMO and Gluten Free

Get 180 servings of high-quality Acetyl L-Carnitine in each bottle of Nutricost capsules. With 500mg per capsule, this supplement can help you manage your energy levels effectively. These capsules are non-GMO, gluten-free, and third-party tested, ensuring their safety and efficacy. Made in a GMP compliant, FDA registered facility, you can trust in the quality of this product.

What We Like
Contains 180 servings of high-quality Acetyl L-Carnitine
500mg per capsule helps manage energy levels
Non-GMO, gluten-free, and third-party tested for safety
Made in a GMP compliant, FDA registered facility
Provides an unflavored, easy-to-take capsule form

Burn-XT Fat Burner

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Jacked Factory Burn-XT Clinically Studied Fat Burner & Weight Loss Supplement - Appetite Suppressant & Energy Booster - with Acetyl L-Carnitine, Green Tea Extract and More - 60 Natural Diet Pills

Burn-XT Fat Burner by Jacked Factory is a clinically studied weight loss supplement designed to increase energy, focus, and metabolic rate. It contains high-stimulant ingredients like caffeine and green tea extract that help support your fitness goals. As a metabolism booster and appetite suppressant, it can help you lose weight and maintain hard-earned muscle tissue. Burn-XT is a comprehensive science-driven formula that provides effective doses of evidence-based ingredients like Capsimax cayenne pepper extract, high-potency green tea leaf extract, caffeine, and more. Plus, it's manufactured in a state-of-the-art cGMP facility using premium raw materials that are tested for purity, potency, and authenticity. With a 30 day money-back guarantee, Burn-XT is a weight loss supplement that you can trust.

What We Like
Clinically studied
Comprehensive formula
Manufactured in cGMP facility

Carlyle Acetyl L-Carnitine Capsules

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Carlyle Acetyl L-Carnitine HCL Capsules| 1000mg | 100 Count | Non-GMO and Gluten Free Supplement

Carlyle Acetyl Capsules are packed with beneficial features. Firstly, they contain Acetyl L-Carnitine, an amino acid that occurs naturally in your body. This supplement delivers 1,000 mg of Acetyl L-Carnitine per serving, perfect for both pre and post-workout needs. Additionally, Carlyle focuses on providing premium supplements to support your health journey. Lastly, the product is free of gluten, wheat, yeast, lactose, artificial sweeteners, and preservatives, ensuring you get a clean, non-GMO formula.

What We Like
Amino acid support
Pre & post-workout
Premium quality
Gluten-free

Horbaach Acetyl L-Carnitine Capsules

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Horbäach Acetyl L-Carnitine 1500mg | 200 Capsules | Extra Strength Supplement | Non-GMO & Gluten Free

Horbaach Acetyl L-Carnitine Capsules are perfect for those who want to energize their routine and support healthy brain function. This supplement contains maximum strength 1500mg free-form capsules for maximum absorption, naturally free of gluten, wheat, yeast, milk, lactose, soy, and artificial color and flavoring. It's a trusted choice for laboratory-tested superior quality ingredients. By taking this supplement, you can convert fat into cellular energy, support healthy brain and neurotransmitter function, and improve cognitive support.

What We Like
Provides maximum strength 1500mg capsules for maximum absorption
Supports healthy brain and neurotransmitter function
Converts fat into cellular energy
Naturally free of gluten, wheat, yeast, milk, lactose, soy, and artificial color and flavoring
Trusted choice for laboratory-tested superior quality ingredients
#TOP 6

Pure Encapsulations L-Carnitine | Cardiovascular and Endurance Support

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Pure Encapsulations L-Carnitine | Hypoallergenic Supplement for Cardiovascular and Endurance Support | 60 Capsules

Pure Encapsulations L-Carnitine is a hypoallergenic supplement that supports amino acid utilization and acts as a carrier of acids into the mitochondria, which converts them to energy. It also supports cardiovascular health and physical recovery from high-intensity exercise. The supplement is made with premium ingredients and is free from wheat, eggs, tree nuts, peanuts, gluten, artificial colors, flavors, sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers, and preservatives.

What We Like
Supports amino acid utilization and energy production
Supports cardiovascular health
Helps physical recovery from high-intensity exercise
Made with premium ingredients
Free from common allergens and unnecessary additives

Nutricost ALCAR Powder - High Quality Non-GMO L-Carnitine Supplement

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Nutricost ALCAR Powder - High Quality Non-GMO L-Carnitine Supplement Cover
Nutricost Acetyl L-Carnitine HCI (ALCAR) 100 Grams per Container - 1G Per Serving - Non-GMO, Gluten Free, Unflavored

Nutricost Acetyl L-Carnitine Powder is a high-quality supplement that contains 1 gram of acetyl L-Carnitine powder per serving. This unique form of L-Carnitine is Non-GMO, Gluten-Free, and 3rd party tested. It comes with a scoop and is made in a GMP compliant, FDA registered facility. This ALCAR powder is designed to support your overall health and fitness goals.

What We Like
Contains 1 gram of acetyl L-Carnitine per serving
Non-GMO and Gluten-Free
Includes a scoop for easy measuring
#TOP 8

Pure Encapsulations L-Carnitine Fumarate Support for Enhanced Muscle | 120 Capsules

Pure Encapsulations L-Carnitine Fumarate Support for Enhanced Muscle | 120 Capsules Cover
Pure Encapsulations L-Carnitine Fumarate | Hypoallergenic Supplement Support for Enhanced Muscle | 120 Capsules

The Pure Encapsulations L-Carnitine Fumarate supplement provides dual support for energizing the heart and muscles while supporting cardiovascular health. It promotes oxygenation of heart muscle, enhances endurance training, and maintains healthy lipid metabolism. The supplement is made with premium ingredients and is free from wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.

What We Like
Promotes dual support for energizing the heart and muscles
Supports cardiovascular health
Enhances endurance training and maintains healthy lipid metabolism
Made with premium ingredients
Free from common allergens and unnecessary additives
#TOP 9

BULKSUPPLEMENTS.COM Acetyl L-Carnitine Powder, ALCAR HCl - Amino Acids Supplement

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BulkSupplements.com Acetyl L-Carnitine Powder - ALCAR Powder, Acetyl L-Carnitine 1500mg, Carnitine Supplement - Gluten Free, 1500mg per Serving, 250g (8.8 oz) (Pack of 1)

BULKSUPPLEMENTS.COM Acetyl L-Carnitine Powder, ALCAR HCl - Amino Acids Supplement is a pure and clean carnitine supplement formulated to provide two main benefits. Firstly, it may help to produce energy more efficiently, allowing you to endure more activities, which is beneficial for those who lead active lifestyles. Secondly, it may help support brain health and function, making it an ideal addition to your daily routine and regimen for individuals leading a healthy lifestyle. It is unflavored and easy to take, and can be added to your shake, protein shake, smoothies, or simply just water. Also, the product is gluten-free, soy-free, dairy-free, and free of added sugars.

What We Like
Pure and clean formula with no fillers or additives
May help to produce energy more efficiently, allowing you to endure more activities
May help support brain health and function
Easy to take and can be added to various beverages
Manufactured according to cGMP Standards to ensure the highest quality
#TOP 10

Thorne Acetyl-L-Carnitine Capsules - Brain Function Support

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THORNE Acetyl-L-Carnitine - 500 mg - Supports Brain Function and Healthy Nerve Sensations in The Hands and Feet - Gluten-Free, Soy-Free, Dairy-Free - 60 Capsules

Thorne Acetyl-L-Carnitine Capsules are a gluten-free, soy-free, and dairy-free dietary supplement that supports healthy brain function and nerve sensations in the hands and feet. With 500 mg of acetyl-l-carnitine, this product acts as an antioxidant in the brain and nerves of the upper and lower limbs, promotes healthy sperm count and motility, and supports cognitive function and focus. Thorne is committed to producing science-backed and pure products, containing no GMOs, artificial preservatives, or allergens, earning the trust of health-care professionals and families worldwide.

What We Like
Supports healthy brain function and nerve sensations in the hands and feet
Acts as an antioxidant in the brain and nerves of the upper and lower limbs
Promotes healthy sperm count and motility
Gluten-free, soy-free, and dairy-free
Produced with pure and science-backed ingredients, containing no GMOs, artificial preservatives, or allergens
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Frequently Asked Questions (FAQs)

1. Can L-carnitine help you lose weight?

Conclusions: l-carnitine supplementation provides a modest reducing effect on body weight, BMI and fat mass, especially among adults with overweight/obesity.

2. How much weight can you lose with L-carnitine?

In a review of nine studies of people with obesity, researchers found that participants taking L-carnitine lost about 2.9 more pounds (1.3 more kilograms) than those who didn't.

3. Which L-carnitine is best for fat loss?

Best Carnitine Supplements. Best Carnitine Overall: Jacked Factory Growth Surge.Best Carnitine-Only Supplement: Kaged L-Carnitine.Best Fat-Burner with Carnitine: Jacked Factory Burn-XT.Best Carnitine Capsules: Kaged L-Carnitine.Best Carnitine For Athletes: Jacked Factory Growth Surge.

4. What are the side effects of L-carnitine?

When taken by mouth: L-carnitine is likely safe when taken for up to 12 months. It can cause side effects such as stomach upset, heartburn, diarrhea, and seizures. It can also cause the urine, breath, and sweat to have a "fishy" odor.

Editor's Notes

During our l-carnitine weight loss supplement research, we found 24 l-carnitine weight loss supplement products and shortlisted 10 quality products. We collected and analyzed 377,116 customer reviews through our big data system to write the l-carnitine weight loss supplements list. We found that most customers choose l-carnitine weight loss supplements with an average price of $22.48.

The l-carnitine weight loss supplements are available for purchase. We have researched hundreds of brands and picked the top brands of l-carnitine weight loss supplements, including NOW Foods, Nutricost, Jacked Factory, Carlyle, Pure Encapsulations. The seller of top 1 product has received honest feedback from 2,199 consumers with an average rating of 4.9.

Written by
Bonnie Salem Avatar

Bonnie Salem is a stay-at-home mother with two-year-old twins and has spent almost half of her life surrounded by baby products. As a mother and a professional copywriter, she has an insightful and unique eye for researching products suitable for infants. Bonnie Salem is an expert in health and nutrition who lives with her family in New Jersey. She has over 15 years of working experience in an institute of medicine after graduating from the University of Toronto. She is highly interested in personal health and wellness.