L-Carnitine is an amino acid supplement that has gained popularity in recent years due to its purported health benefits.

But, like any other supplement, taking too much can lead to side effects and counter-indications. Let's dive into the basics of L-Carnitine supplementation so you can make an informed decision about your own health.

What is L-Carnitine?

L-carnitine is a naturally occurring amino acid that helps the body convert fatty acids into energy. It is found naturally in red meat, poultry, fish, dairy products, and some vegetables such as broccoli and asparagus.

L-carnitine supplements are used by athletes to increase their energy levels during exercise and by those trying to lose weight or manage their cholesterol levels.

Side Effects of Taking Too Much L-Carnitine

The most common side effects of taking too much l-carnitine include nausea, vomiting, abdominal cramps, diarrhea, headache, and fatigue.

Other more serious side effects include an increased risk of heart attack or stroke if taken with a statin medication or warfarin (a blood thinner). It is important to talk to your doctor before taking any type of supplement.

The recommended daily dosage for l-carnitine varies based on age and purpose but generally falls between 500 mg - 2g per day depending on your individual needs.

Who Should Not Take It

Some people should avoid taking l-carnitine altogether including pregnant women and those with kidney disease or diabetes who are already experiencing elevated levels of carnitine in their bodies due to their condition.

Additionally, anyone taking medications for seizures should not take l-carnitine without talking to their doctor first as it may interact with these medications leading to unwanted side effects.


When taken correctly, l-carnitine can be an effective dietary supplement for those looking for increased energy levels during exercise or weight management support.

However, it is important to research the potential side effects before beginning supplementation, and be sure to work with your doctor if you have any questions or concerns regarding its use in conjunction with other medications you may be taking.

Ultimately it’s up to you to decide whether or not l-carnitine supplementation is right for you but armed with this information you can make an informed decision about your own health!

And, as always, keep on reading...

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