L-Carnitine. Boost Weight Loss & Improve Heart Health

Updated: 1/11/24

Have you ever felt like you were doing everything right with your diet and exercise but the scale just wasn’t budging? Or maybe you’ve been working hard to lose a few pounds but hit a frustrating plateau? If this sounds familiar, you’re not alone. Getting those last few pounds off can be incredibly difficult, no matter how disciplined you are with your calorie counting and gym routine. That’s where L-carnitine comes in. As a health-conscious person, you’re always looking for natural ways to give your metabolism and fat loss an extra boost. Well, L-carnitine may just be the boost your weight loss efforts have been missing. In this post, I’ll share what L-carnitine is, how it works to burn fat and lose weight, as well as some remarkable research on its heart health benefits. 

What is L-Carnitine?

L-Carnitine is a naturally occurring amino acid that plays an important role in your body. It is found in high concentrations in your muscles, the heart and the brain. Its primary function is to help your body turn fat into energy. It does this by transporting fatty acids into your mitochondria, where they are oxidized to produce energy. This is why L-Carnitine is often referred to as a fat burner.

The key to L-Carnitine’s effectiveness as a fat burner lies in its ability to increase your body’s metabolism. When you have higher levels of L-Carnitine in your body, your body can more efficiently burn fat. This leads to improved energy levels, reduced body fat and improved athletic performance. The supplement form of L-Carnitine is manufactured in labs and is available as L-Carnitine tartrate, L-Carnitine fumarate, and Acetyl-L-Carnitine.

It has been a staple in health and wellness culture for decades. It was discovered in 1905 by Russian chemist Vladimir Gulevich and was first synthesized in the early 20th century. By the 1980s, it had become popular as a dietary supplement among athletes and bodybuilders due to its fat-burning and performance-enhancing properties. Today, L-Carnitine is still widely used in the fitness industry, and many health experts swear by its benefits.

L-Carnitine Benefits

May Provide Fat Burning

It is essential for fatty acid metabolism, which allows your body to use stored fat as energy. By increasing your L-Carnitine levels, you can help your body burn fat more efficiently and improve your exercise performance.

May Aid in Weight Loss

L-Carnitine is often in use as a supplement for weight loss. It helps in the conversion of fat into energy, which in turn can help burn body fat. It works by moving fatty acids to the mitochondria, where they are burned for energy.

Supports Heart Health

Because it helps transport fatty acids into your cells’ mitochondria, it can provide significant benefits for your heart. Research shows that L-Carnitine can reduce the risk of heart disease, lower blood pressure, and improve cardiac function after a heart attack.

May Aid in Diabetes Management

It has also shows to have benefits for people with diabetes. It can help improve insulin sensitivity and reduce blood sugar levels, which can make it easier to manage the condition. Studies have also suggests that it may help alleviate some of the complications associated with diabetes, such as nerve damage and kidney disease.

May Brain Boost

It can also help improve cognitive function by reducing oxidative stress and inflammation in the brain. Research has shown that L-Carnitine can improve memory, learning, and overall brain health. This supplement has been used to treat Alzheimer’s and other age-related brain disorders.

May Provide Muscle Recovery

It can aid in muscle recovery by reducing muscle damage and inflammation after exercise. This can help alleviate soreness and improve your overall muscle performance.

May Boost Metabolism

It can help boost your metabolism, which means you’ll burn more calories at rest and during exercise. This can make it easier to lose weight and maintain a healthy weight over time. Studies show that supplementation with L-Carnitine can increase the amount of fat burned during exercise by up to 30%! If you’re looking to lose weight or improve your body composition, L-Carnitine is a great choice.

May Boost Immunity

It can also help in boosting the immune system. It acts as an antioxidant, which helps to protect against oxidative stress, and strengthens the immune system.

May Enhance Your Athletic Performance

If you’re an athlete or fitness enthusiast, it can help improve your performance. By increasing the amount of fat burned during exercise, it can help delay fatigue and improve endurance. This means you’ll be able to work out harder and longer, leading to better results. L-Carnitine shows to reduce muscle damage and soreness after exercise, which can help speed up recovery time.

Improves Skin Health

It shows to improve skin health. It helps in the regeneration of skin cells, which can lead to healthier and younger-looking skin.


It can also have significant anti-aging effects. By reducing oxidative stress and inflammation in the body, it can help improve skin health, reduce wrinkles, and boost your immune system’s ability to fight off disease.

L-Carnitine Benefits

Side Effects of L-Carnitine

Digestive Issues

One of the most commonly reported side effects is digestive discomfort. Taking L-carnitine supplements on an empty stomach can lead to symptoms like nausea, diarrhea, and cramps. This is because L-carnitine is quite acidic, and taking it on an empty stomach can irritate the lining of the stomach. To avoid this, it’s recommended to take L-carnitine with food.

Fishy Body Odor

Another potential side effect is a fishy body odor. This is due to a metabolic byproduct of L-carnitine, trimethylamine (TMA), which is excreted through sweat, breath, and urine. Some people are genetically predisposed to producing more TMA when they consume L-carnitine, leading to a fishy odor. While this side effect is generally harmless, it can be unpleasant for some people.

Increased Risk of Headaches

Some studies have suggested that taking supplements may increase the risk of headaches. This is believed to be due to increased blood flow to the brain caused by L-carnitine supplements. However, it’s important to note that this effect is not universal, and some people may not experience any increase in headache frequency or severity.

Risk of Insomnia

Some people have reported that taking supplements can interfere with their sleep patterns, leading to insomnia. While there isn’t a clear mechanism behind this side effect, it’s thought to be related to L-carnitine’s effects on energy metabolism. To avoid insomnia, it’s recommended to take L-carnitine supplements earlier in the day rather than at night.


There is some concern that it may contribute to acne breakouts. However, there is little scientific evidence to support this claim. In fact, some studies have even suggested that L-Carnitine may have a positive effect on skin health by reducing inflammation and improving hydration. If you are concerned about L-Carnitine causing acne, speak to a dermatologist before taking the supplement.

Blood Sugar Levels

It shows to improve insulin sensitivity in people with type 2 diabetes. However, if you already have low blood sugar levels, taking L-Carnitine may cause your blood sugar levels to drop even further. If you are taking any medications to manage your blood sugar, speak to your doctor before adding L-Carnitine to your regimen.

Carnitine Deficiency

People who follow a vegetarian or vegan diet are at higher risk of carnitine deficiency because it is primarily found in animal products. If you are following a plant-based diet, you may want to consider taking a L-Carnitine supplement to ensure that you’re getting enough of this essential nutrient. However, be careful not to exceed the recommended dose, as too much L-Carnitine can cause side effects like diarrhea and nausea.

Heart Health

It shows to have a positive effect on heart health by improving circulation and reducing inflammation. However, in rare cases, L-Carnitine may cause an irregular heartbeat and other cardiac issues. If you have a history of heart problems, speak to your doctor before taking L-Carnitine.

Kidney Function

There are concerns that taking it may have a negative effect on kidney function, particularly in people with pre-existing kidney disease. However, there is little scientific evidence to support this claim. If you are concerned about the effect of L-Carnitine on your kidneys, speak to your doctor before taking the supplement.

Interaction with Certain Medications

The supplements may interact with certain medications, including blood thinners and thyroid hormone replacement therapy. If you’re taking any medications, it’s important to speak with your healthcare provider before taking L-carnitine supplements to ensure that there are no potential interactions.


Although many supplements are safe to take, exercising caution is your best defense against unwanted side effects. Your first defense should always be talking to your doctor before taking new supplements. They will determine what supplements are right for you and how much you should be taking daily.

Your next defense is to follow dose instructions on the packaging of the supplement you’re taking. Start with small doses first before gradually increasing them.

Where to Buy L-Carnitine

Want to meet your dietary needs effortlessly? Look no further than BulkSupplements.com! As the go-to industry leader, we’re all about providing pure dietary supplements. Not just that—our top-notch products power other food and supplement brands too! You can trust that all our offerings undergo strict manufacturing and testing practices. Feel curious about trying out L-Carnitine as a dietary supplement? Waste no time and place your order today at BulkSupplements.com!


The Bottom Line

L-Carnitine is an amazing supplement that can offer a range of benefits for your health and fitness. From increasing energy levels and aiding in weight loss to supporting your heart health and strengthening your immune system, it has a lot to offer. So if you’re looking to take your health and fitness to the next level, L-Carnitine could be a valuable addition to your diet. Consult with your healthcare professional to determine the right dose and the best way to incorporate L-Carnitine into your nutritional routine.

In conclusion, it can be a safe and effective supplement as long as it’s used correctly and with caution. While it does offer numerous health benefits, it’s important to be aware of its potential side effects before adding it to your regimen. Always start with a low dose and gradually increase it over time, and if you experience any adverse effects, discontinue use and consult your doctor. If used correctly, L-Carnitine can be a valuable tool in your fitness and wellness journey.

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease

Author: BulkSupplements Staff