Gamma Butyrobetaine Ethyl Ester, commonly known as GBB, is one of the newer ingredients on the market, and it is almost exclusively found in fat burning products, although there may be benefits to taking it pre-workout. GBB is converted into Carnitine in the body.

While we highly suggest you go ahead and take a look at our page on Carnitine and the benefits of it, just know that Carnitine has been shown to be potentially beneficial for fat loss. Carnitine has also been studied to be good for brain function/focus. Of course, there are more.

Another interesting study has shown GBB to be a vasodilator, meaning it may aid in pumps. So you may find some companies utilizing this ingredient in pre-workouts and pump products in the future, although there are none that come to mind to promote it this way as of yet.

You can expect an increase in sweat, and by increase, it actually is very intense for some people. The reason for this is not clear, but we’ll we enjoy it here on FI!

For the most part, you’ll find GBB paired with ingredients such as Caffeine Anhydrous, Grains of Paradise, Yohimbine, and Synephrine. 

One side effect we have to note is sweating.

Some side effects of Carnitine include nausea, vomiting, upset stomach, heartburn, diarrhea, and  seizures.

The recommended dose for GBB is currently 25mg-50mg once per day, although you may also take 25mg twice a day.

The following products contain Gamma Butyrobetaine Ethyl Ester at the recommended dosage, and are recommended supplements for Fitness Informant: