07/08/2022
Do fat burners really work?
Yes and no. The only way to reduce body fat without surgery is to burn more calories than you take in. That sounds simple but it’s actually quite nuanced. We’ll keep it simple though for the sake of this discussion.
With that being the case, fat burners should do one or both of the following:
Increase calorie burn
Decrease appetite (without adding to caloric intake)
The problem here is that there are very few ingredients out there in the wild that have been scientifically proven to do those things. In fact, the overwhelming evidence supports just one single ingredient: caffeine.
Caffeine increases the calories you burn by increasing your heart rate and causing you to move more. It also has appetite-suppressing effects.
When you think of caffeine, do you think of overpriced fat burners, or do you think of coffee, tea, and pop? That’s a no-brainer. So, imagine your surprise when you look at the label of nearly every fat burner on the market and discover caffeine is the active ingredient.
The magic must be in all the other ingredients then, right?
Most likely not. From what little research we have, the only ingredients other than caffeine that are capable of increasing calorie burn and decreasing appetite are those that behave similarly to caffeine. In other words, stimulants. And there are only two (legal+OTC) stimulants that can create an effect anywhere near the magnitude of caffeine. Those are yohimbine and synephrine.
Other decent ingredients to look out for are BCAAs, HMB, or Green Tea Extract.
Have you used fat burners? Let me know in the comments!