Complete Guide to Injectable L-Carnitine – Is it Worth It?

L-Carnitine is a naturally occurring compound that plays an essential role in energy production.

Because of it, some people inject L-Carnitine to boost their energy levels, lose weight, or improve their athletic performance.

But is injecting L-carnitine worth it? Is there any benefit in doing so?

Let’s find out.

What is L-Carnitine?

L-carnitine is a naturally occurring amino acid derivative that is found in many foods, including red meat and dairy products.

It plays a critical role in the body’s energy production process, specifically by transporting fatty acids into the mitochondria, the “powerhouses” of the cells, where they can be used to produce energy.

This can help to support a number of vital bodily functions, including muscle movement, heart function, and brain function. Additionally, L-carnitine has been studied for its potential benefits in supporting weight loss, improving exercise performance, and reducing fatigue.

What Does Injectable L-Carnitine Do?

Because it is delivered directly into the bloodstream, injectable L-carnitine is presumed to be more quickly absorbed by the body than other L-carnitine forms, such as oral supplements.

Since the primary function of L-carnitine is to help transport fatty acids into the mitochondria, it can potentially boost energy production and support weight loss.

Additionally, some suggest that injectable L-carnitine may improve targeted fat loss by increasing the availability of fat for fuel in certain areas, which could theoretically be very beneficial for bodybuilders and fitness enthusiasts looking to burn fat in stubborn areas like the lower abdomen.

However, as we know, targeted fat loss is pretty much a myth at this point, and there’s hardly any tangible evidence supporting this theory.

Finally, injectable L-carnitine may help reduce fatigue and improve exercise performance, which could potentially be beneficial for athletes looking to gain an edge in their sport.

Do L-Carnitine Injections Help with Weight Loss?

Yes, L-carnitine injections may be beneficial for weight loss, as they can help the body transport fatty acids into the cells, where they can be used to produce energy. This helps to boost metabolism, which in turn could lead to weight loss and fat burning.

However, on its own, injecting L-carnitine is unlikely to cause any weight loss. It should be combined with a healthy diet and regular exercise to make the most of its potential benefits.

Do L-Carnitine Injections Affect Testosterone?

Higher levels of testosterone stimulate the production of testosterone.

In other words, the more testosterone you have, the more l-carnitine you have, which is one of the reasons testosterone is known for aiding weight loss.

This also works the other way around. Supplementing with l-carnitine should lead to increased testosterone levels.

However, the difference in testosterone levels caused by l-carnitine supplementation usually isn’t very significant and is by no means comparable to the effects of HRT or TRT.

Is Injectable L-Carnitine Better Than Oral?

Some studies have shown that injectable L-Carnitine may help the body absorb and utilize it more efficiently than other forms of L-Carnitine. [1] This could potentially lead to faster and more noticeable results in terms of energy production, fat burning, and improved exercise performance.

However, studies on this subject have been somewhat conflicting, and more research is needed to draw concrete conclusions.

Additionally, injecting supplements honestly sounds like overkill. Even if we were to agree that injectable L-carnitine is more effective than oral, it’s still much more inconvenient, not to mention only marginally more effective.

So, is it better? It seems like it. Is it worth it? I wouldn’t say so.

What Happens if You Take Too Much Carnitine?

There are potential side effects associated with higher doses of L-carnitine. These include:

  • Nausea
  • Vomiting
  • Abdominal pain
  • Cramps
  • Diarrhea

Too much carnitine can also lead to arteriosclerosis, which is the thickening and hardening of arterial walls. [2] Arteriosclerosis can increase the risk of heart attack, stroke, and other cardiovascular complications.

Finally, l-carnitine supplementation was also linked with seizures in people with seizure disorders.

How Much Carnitine Does the Body Actually Absorb?

The body’s absorption of L-carnitine depends on the form of L-carnitine consumed and the individual’s age, sex, and general health.

L-carnitine, which is found in red meat and dairy products, can be utilized by the body at a high percentage (54-86%). However, when taken as a supplement or injection, the absorption rate of L-carnitine drops significantly (14-18%).

Not only that, but as we age, our bodies may become less effective at synthesizing L-carnitine.

Why L-Carnitine Isn’t a Necessary Supplement to Take

All things considered, especially the absorption rate, L-carnitine is undoubtedly not a must-have supplement.

In fact, foods that are high in L-carnitine, such as red meat, fish, and dairy products, are all considered excellent sources of this amino acid derivative.

But also, our bodies (if healthy) produce more than enough L-carnitine on their own, so it’s not necessary for athletes to get an extra dose of this compound.


While there is no doubt whether or not L-carnitine supports weight loss, as a supplement – it is far from a must-have. It’s just not worth it.

Sure, it may help increase fat burning and energy levels when combined with exercise, but its effects are not significant enough to justify the cost and effort.

For those looking to shed a few extra pounds, there are other more effective methods that don’t involve risking side effects or spending money on expensive supplements.

Share This Post

Providing you with the resources to build your best life and physique.

Articles: 125

Leave a Reply

Your email address will not be published. Required fields are marked *