Best Carnitine for Weight Loss (2026) – Top 10 Reviewed
L-carnitine has become a popular supplement for weight loss and fat burning, helping transport fatty acids into your cells’ mitochondria where they’re burned for energy. This amino acid-like compound supports metabolism, enhances exercise performance, and may help reduce fat mass when combined with training. This guide covers the best carnitine supplements available on Amazon for effective weight management and athletic performance.
Our Top Picks at a Glance
- Best Overall: PEScience Alphamine Thermogenic Pre Workout — dual-action fat burning
- Best for Night: Night Time Fat Burner with L-Carnitine — overnight metabolism
- Best Value: EVL BCAA Lean Energy — pre-workout fat support
Quick Comparison
| Product | Key Ingredients | Form | Servings | Best For |
|---|---|---|---|---|
| PEScience Alphamine | L-Carnitine, Green Tea, Caffeine | Powder | 84 | Pre-workout energy |
| Night Time Fat Burner | L-Carnitine, Magnesium, Melatonin | Capsules | 60 | Overnight support |
| EVL BCAA Lean Energy | L-Carnitine, BCAAs, Green Tea | Powder | 30 | Workout performance |
| Morning Fat Burner Gummies | Green Coffee, Garcinia, B-Vitamins | Gummies | 60 | Morning metabolism |
| EVL Ultimate Pre Workout | Thermogenic Complex, L-Carnitine | Powder | 40 | Intense workouts |
| Evlution Night Time Fat Burner | CLA, L-Carnitine, Sleep Support | Capsules | 60 | Sleep + metabolism |
| Women’s Fat Burner Gummies | Green Tea, Green Coffee, Garcinia | Gummies | 60 | Women’s metabolism |
1. PEScience Alphamine Thermogenic Pre Workout — Best Overall
- Smooth, Focused Energy - Alphamine combines caffeine with Infinergy (dicaffeine malate) to deliver rapid onset and sustained energy—without the spike-and-crash cycle common in standard formulas. L-theanine and L-tyrosine complement the blend to promote cognitive clarity and focus and to give you a clean burn, smooth energy, and no crash.
- L-Carnitine Enhanced - Standalone L Carnitine supplements often fail to elevate tissue levels. Alphamine includes 2g L-Carnitine L-Tartrate alongside 1g choline bitartrate, a pairing supported by human data to enhance carnitine absorption and support fatty acid metabolism. Without choline combined with carnitine, the carnitine can't do it's intended job. Something many pre workout fat burner products don't understand.
- Evidence-Backed Thermogenics - Alphamine includes Aframomum melegueta (Grains of Paradise), shown in clinical research to increase energy expenditure through brown adipose tissue activation. Combined with ENERGIC Portulaca oleracea, a novel herbal extract, this duo supports thermogenesis without adding unwanted jitters or stimulation. For a fat burning pre workout, we want users to enjoy the feeling of Alphamine.
- Designed for versatility - Alphamine functions as a true thermogenic pre-workout or as your go-to morning energy drink. Whether you're training fasted or just need clean energy to get you through the day, Alphamine works with you to support your routine. It contains NO beta-alanine or creatine, and can be used by both men and women.
- Unmatched Value: 60 Precision-Scooped Servings - With 60 scoops per bottle, Alphamine outlasts most thermogenics and energy powders on the market. That’s 30 full servings, or flexible dosing that stretches your supply further—without sacrificing effectiveness or flavor. Alphamine is the original, pioneering preworkout fat burner.
This comprehensive pre-workout combines L-carnitine with green tea extract and caffeine for powerful fat burning and energy support.
Each serving provides L-carnitine tartrate to transport fats for energy, green tea extract for thermogenesis, and moderate caffeine for energy without jitters. The formula also includes electrolytes for hydration. Designed to be taken before workouts, it enhances fat burning during exercise while providing clean energy and focus.
What We Like
- Combines fat burning with workout performance
- L-carnitine enhances fat transport during exercise
- 84 servings offers excellent value
What Could Be Better
- Contains caffeine, not suitable for evening use
- Powder requires mixing
Bottom Line: The best all-in-one option combining L-carnitine fat burning with pre-workout energy and performance.
2. Night Time Fat Burner with L-Carnitine — Best for Overnight Support
- Night Time Weight Loss Supplement – Phytochoice Night Time Fat Burner is a powerful weight loss supplement that works while you sleep. This science-backed formula boosts metabolism, curbs appetite, and supports deep, restful sleep for real overnight results.
- Fat Burner That Supports Nighttime Metabolism – A stimulant-free fat burner designed to activate your metabolism during sleep. Features Green Coffee Bean Extract and CLA to convert fat into energy—without disturbing your rest.
- Appetite Suppressant & Carb Blocker – Includes White Kidney Bean Extract as a natural appetite suppressant and carb blocker to help reduce cravings, control hunger, and target stubborn belly fat—even overnight.
- Supports Relaxation and Deep Sleep – With Ashwagandha, Melatonin, Valerian Root, and 5-HTP, Phytochoice’s calming blend helps your body unwind, sleep soundly, and wake up refreshed—with no grogginess.
- 100% Natural Ingredients from Phytochoice – This premium formula uses only non-GMO, natural ingredients. No artificial fillers, preservatives, or chemicals. Made in the USA in a cGMP-certified facility and third-party tested for quality and purity.
This stimulant-free formula works while you sleep, combining L-carnitine with magnesium and melatonin for overnight fat metabolism.
Designed for bedtime use, this supplement provides L-carnitine to support fat metabolism during sleep along with magnesium for relaxation and melatonin for quality rest. The stimulant-free formula won’t interfere with sleep while helping your body burn fat overnight. This creates a 24-hour approach to fat loss.
What We Like
- Stimulant-free for safe nighttime use
- Melatonin supports sleep quality
- L-carnitine works during rest periods
What Could Be Better
- Melatonin may not suit everyone
- Works best combined with daytime fat burner
Bottom Line: A smart nighttime option that supports both sleep quality and overnight fat metabolism.
3. EVL BCAA Lean Energy Powder — Best for Workouts
- Multipurpose Pre Workout Powder - Our BCAAs amino acids powder is in a league of its own as both a thermogenic fat burner support and energy drink powder to fuel and enhance your power and endurance
- Amino Acid Supplement for Men - Try our fat burning support workout supplement for men packed with 5 grams of branched chain amino acids in the ideal 2:1:1 ratio and more
- Higher Performance - Our energizing preworkout powder drink helps support your goals by enhancing muscle recovery hydration endurance focus muscle growth and performance while supporting fat loss
- Uncompromising Quality - Choose EVL and our BCAA Lean Energy powder with carefully chosen ingredients like L-alanine CLA and Maca root to give you the edge you need with sustainable energy and focus
- Why Evlution Nutrition - EVL is a leading name in fitness and bodybuilding amino acid nutritional supplements for men and women because use the finest lab tested performance maximizing ingredients
This innovative formula combines L-carnitine with BCAAs and green tea for fat burning plus muscle recovery support.
Each serving provides L-carnitine for fat transport, branched-chain amino acids (BCAAs) for muscle recovery, and green tea extract for additional thermogenesis. Natural caffeine from green tea provides energy without jitters. This combination supports fat loss while preserving lean muscle during training.
What We Like
- Combines fat burning with muscle recovery
- BCAAs help preserve muscle during weight loss
- Great tasting powder mixes easily
What Could Be Better
- Contains caffeine from green tea
- Smaller serving count than some options
Bottom Line: An excellent choice for those who want fat burning and muscle recovery in one convenient formula.
4. Morning Fat Burner Gummies — Best Morning Option
- BELLY FAT TARGETING: For most of us, excess pounds tend to stack up in the middle. By boosting metabolism, fueling your day, and controlling appetite, this fat burner for men and women helps you achieve weightloss for belly fat.*
- METABOLISM BOOST: Morning Fat Burner Gummies are designed to get your metabolism running. Ingredients like Garcinia Cambogia, and Raspberry Ketones work to help you burn more energy throughout the day, making it a truly effective fat burner.*
- APPETITE CONTROL: Nothing wrecks fitness goals more than overeating, and diet pills don’t always help. That's why this blend featuring Green Tea is designed to help you control the cravings and hunger that can threaten your progress.*
- MORNING ENERGY: One of the strongest benefits of Morning Fat Burner Gummies is the energy they provide right after you wake up. Whether you start your day with exercise, head to work, or take care of the kids, these gummies will keep you energized all day.*
- MADE THE RIGHT WAY: Our weight loss supplement is designed to get results. And with Nobi Nutrition, you know you’re getting the best every time, with a non-GMO formulation, third-party testing, and manufacturing in a cGMP certified facility.
These energizing gummies provide thermogenic support to jumpstart your metabolism each morning.
Each serving combines green coffee bean extract for gentle energy and chlorogenic acid, garcinia cambogia for HCA and appetite control, and B-vitamins for energy metabolism. The gummy format makes morning supplementation enjoyable and easy. Designed to be taken with breakfast to activate metabolism for the day.
What We Like
- Pleasant taste encourages daily use
- Green coffee provides clean energy
- B-vitamins support energy production
What Could Be Better
- Contains added sugars for flavor
- Lower doses than capsule formulas
Bottom Line: An accessible morning metabolism booster in an enjoyable gummy format.
5. EVL Ultimate Pre Workout Powder — Best for Intense Training
- Science Based Formula - Try the ENGN Shred pre-workout energy and focus supplement with exclusive ingredients including Beta alanine Agmatine Huperzine A L-Carnitine Yohimbe CLA and much more
- Achieve More - Maximize your workouts with enhanced natural energy endurance and intense focus thanks to specially engineered blends featuring Betaine and more to amplify your performance
- Clean Complex - We’re proud to use some of the best energizing preworkout ingredients for peak performance including Forskolin and EGCG Green tea extracts to amplify your energy without the crash
- Enhanced Power and Pumps - Our tasty pre workout energy powder works as a sustainable energy source for better muscle endurance metabolic support and nitric oxide production for a shredded look
- Why Evlution Nutrition - EVL is a leading name in effective bodybuilding supplements because we take our quality seriously and only use the finest lab tested performance maximizing ingredients
This powerful pre-workout includes thermogenic fat burners with L-carnitine for maximum workout intensity and fat burning.
The formula combines L-carnitine with a comprehensive thermogenic complex including green tea extract, caffeine, and other fat-burning compounds. Performance ingredients like beta-alanine and citrulline support strength and endurance. This creates a comprehensive pre-workout that enhances both performance and fat oxidation.
What We Like
- Comprehensive thermogenic complex
- Supports both fat burning and performance
- Ideal for high-intensity training
What Could Be Better
- Higher caffeine content than some prefer
- Only for those who train regularly
Bottom Line: A powerful option for serious athletes seeking maximum fat burning and workout performance.
6. Evlution Nutrition Night Time Fat Burner — Best Complete Nighttime
- Nighttime Fat Burner Support Complex - Time to support your natural metabolism with boosting ingredients including white kidney bean extract EGCG green tea and chromium picolinate with BioPerine
- Maximize your Rest - It's no secret that your body still works hard while you sleep and NiteLean features a rest inducing blend to utilize this important time while supporting faster metabolism
- Sleep Better - We know that a good night's rest is essential for peak performance so rest assured with melatonin paired perfectly with GABA L-theanine and 5HTP for better rest quality and duration
- Weight Loss Supplement for Multipurpose Support - Our unique shredding complex offers multiple benefits to give you the leanest figure yet including supporting decreased hunger and faster metabolism
- Why Evlution Nutrition - We fully disclose NiteLean ingredients because we're proud to use premium quality third party tested formulas made in cGMP facilities because you deserve nothing but the best
This comprehensive nighttime formula combines L-carnitine and CLA with sleep support for 24-hour fat burning.
The formula provides L-carnitine for fat transport along with CLA (conjugated linoleic acid) for additional fat metabolism support. Sleep-supporting ingredients help ensure quality rest, which is crucial for weight loss and recovery. This stimulant-free formula works overnight without disrupting sleep.
What We Like
- Combines multiple fat-burning mechanisms
- CLA adds additional metabolic support
- Sleep support ingredients included
What Could Be Better
- Multiple capsules per serving
- Best results require consistent nighttime use
Bottom Line: A comprehensive nighttime approach combining L-carnitine, CLA, and sleep support for optimal results.
7. Women’s Fat Burner Gummies — Best for Women
- FAT BURNER FOR WOMEN: These fat burning gummies are a delicious way to harness the power of green tea for weight loss and belly fat. With a potent fat burning blend, they’re the weightloss gummies for women who want to achieve results.*
- APPETITE SUPPRESSANT GUMMIES: Our Green Tea fat burner is rich in catechins, compounds which support your body’s ability to burn calories.* Garcinia Cambogia & Raspberry Ketones also aid metabolism, to burn fat and help you to feel fuller for longer.*
- WITH GREEN TEA: It’s not only about Green Tea weight loss! Green Tea contains EGCG, a compound that acts as a super antioxidant and can promote strong anti-aging properties for skin and overall health.*
- ENERGY & FOCUS: Caffeine from Green Tea & Green Coffee Bean provides energizing, fat-burning support with each serving. These Green Tea gummies also support clarity and focus, so you can stay sharp and focused on your fat loss goals!*
- DELICIOUS APPLE FLAVOR: Each bottle of Women’s Fat Burner Gummies contains 60 gummies for weight loss (a 1 month supply). They are pectin-based, free from artificial flavors or colors, third-party tested, and manufactured in a facility that adheres to GMP guidelines.
These women-specific gummies combine thermogenic ingredients designed for female metabolism and hormones.
The formula features green tea extract for EGCG, green coffee bean for chlorogenic acid, and garcinia cambogia for HCA. These ingredients support thermogenesis while being gentle on female hormones. The gummy format with natural flavors makes daily supplementation enjoyable rather than a chore.
What We Like
- Formulated specifically for women
- Three proven thermogenic ingredients
- Pleasant berry flavor
What Could Be Better
- Contains small amounts of added sugar
- Lower potency than capsule versions
Bottom Line: An effective, enjoyable thermogenic option designed specifically for women’s metabolic needs.
How to Choose the Best Carnitine for Weight Loss
Consider when you’ll take your carnitine supplement and what you want to accomplish. For pre-workout fat burning, choose formulas with L-carnitine plus caffeine and thermogenic ingredients. These enhance fat oxidation during exercise when carnitine is most effective. For nighttime use, select stimulant-free options with L-carnitine, magnesium, and sleep support to avoid disrupting rest.
Evaluate the form of carnitine and delivery method. L-carnitine tartrate is well-absorbed and commonly used in pre-workout formulas. Acetyl-L-carnitine crosses the blood-brain barrier more easily and may offer cognitive benefits. Powders mix into drinks and allow flexible dosing, while capsules provide convenience. Gummies taste better but contain lower doses and added sugars.
Look at complementary ingredients that enhance carnitine’s effects. Green tea extract provides EGCG for additional thermogenesis. BCAAs help preserve muscle during fat loss. Caffeine increases energy expenditure and enhances fat oxidation. CLA works through different pathways than carnitine for synergistic fat loss. Choose formulas that align with your training and goals.
Check the dosage to ensure effectiveness. Research suggests 2-4 grams of L-carnitine daily for fat loss benefits, with most benefits seen around 2 grams. Pre-workout formulas typically provide 1-2 grams per serving to be taken before training. For all-day support, divide doses between morning and pre-workout or choose a comprehensive formula.
Consider your caffeine tolerance and timing. Many carnitine supplements include caffeine for synergistic fat burning. If you’re sensitive to stimulants or training in the evening, choose stimulant-free options. For morning or pre-workout use, moderate caffeine can enhance results. Always check total daily caffeine from all sources.
Benefits of Carnitine for Weight Loss
L-carnitine transports long-chain fatty acids into your cells’ mitochondria where they’re oxidized for energy. This is carnitine’s primary mechanism for supporting fat loss—it literally helps shuttle fat to where it can be burned. Without adequate carnitine, fat burning is less efficient. Supplementation ensures optimal levels for maximum fat oxidation, especially during exercise.
Exercise performance improves with carnitine supplementation, allowing you to train harder and burn more calories. Research shows carnitine can reduce exercise-induced muscle damage and soreness, supporting faster recovery between workouts. It may also improve oxygen utilization during training. These performance benefits support greater training volume and intensity for enhanced fat loss.
Metabolic rate receives a modest boost from carnitine, particularly when combined with exercise. Studies show carnitine supplementation can increase fat oxidation by 10-15% during training. While the effect is moderate, it adds up over weeks and months of consistent use. The benefit is most pronounced in those with lower baseline carnitine levels.
Muscle preservation occurs during caloric restriction when carnitine is present. By improving fat oxidation, carnitine helps your body preferentially burn fat rather than breaking down muscle for energy. This is crucial during weight loss, as maintaining muscle keeps metabolism high. Research shows carnitine can help preserve lean mass during dieting.
Frequently Asked Questions
How much L-carnitine should I take for weight loss?
The effective dose range is 2-4 grams daily, with most studies using 2 grams. For best results, take 1-2 grams before workouts and potentially another 1-2 grams at another time of day. Doses above 4 grams don’t appear to provide additional benefits and may increase digestive side effects.
When is the best time to take L-carnitine for fat loss?
The most effective time is 30-60 minutes before exercise, as carnitine enhances fat oxidation during physical activity. If taking multiple doses, consider splitting between morning and pre-workout. Carnitine can be taken with or without food, though some find taking it with carbohydrates enhances absorption.
How long does it take for L-carnitine to work for weight loss?
Most people notice improved exercise performance and recovery within 2-3 weeks. Fat loss benefits typically become apparent after 6-8 weeks of consistent use combined with regular exercise and caloric restriction. Carnitine works gradually by improving fat metabolism rather than causing rapid weight loss.
Do I need to exercise for L-carnitine to work?
While carnitine has some benefits at rest, it’s most effective when combined with exercise. Physical activity increases fat oxidation, and carnitine enhances this process. Sedentary individuals may see minimal fat loss benefits from carnitine alone. For optimal results, combine carnitine with regular cardiovascular and resistance training.
Can I take L-carnitine with other fat burners?
Yes, carnitine works well with other fat burners like green tea extract, caffeine, and CLA through different mechanisms. Many pre-workout fat burners combine these ingredients for synergistic effects. However, be mindful of total caffeine intake from all sources to avoid overstimulation.
Are there any side effects of L-carnitine?
L-carnitine is generally well-tolerated at recommended doses. Some people experience mild nausea, stomach discomfort, or a fishy body odor at high doses (over 3 grams daily). These effects are uncommon at standard doses. Starting with lower amounts and gradually increasing can minimize any digestive issues.
What’s the difference between L-carnitine and acetyl-L-carnitine?
L-carnitine is primarily used for fat metabolism and athletic performance. Acetyl-L-carnitine (ALCAR) crosses the blood-brain barrier more easily and may offer cognitive benefits in addition to fat burning. For pure fat loss and exercise performance, standard L-carnitine or L-carnitine tartrate is most studied.
Will L-carnitine cause weight loss without diet and exercise?
No, carnitine is not a magic weight loss pill. It works by improving your body’s ability to burn fat during exercise and supporting exercise recovery. Without a caloric deficit created through diet and/or exercise, carnitine alone won’t cause significant weight loss. It’s a supportive supplement, not a replacement for healthy habits.
