Because I did a lot of exercise and diet, I can't be sure about how much it worked, but somewhere I read that if you have a problem with caffeine and it causes you palpitations and anxiety, then this supplement is for you! If I drink a coffee, it bothers me a lot and it creates anxiety, but with this specific supplement, I didn't have such an issue with the recommended dosage, but I only had the positive effects of caffeine!! This helped me a lot and I also used it as a pre-workout. Its taste is incredible, I loved it, it became my favorite taste in a dietary supplement, a pink something.. personally, I think it did the job, it helped but not crazy things, but I believe it does what it promises, I just can't say for sure. I recommend it and I will try it again!

It caused a burning sensation throughout my body, like being stung and burned, and it gave me migraines and fever

I have bought it before in a different flavor. Both flavors are good. It leaves a bitter taste and causes tingling sensation.

At the same time, I was doing both exercise and diet, I don't know how much it helped. I know that I lost 10 kilograms in one month. It had no side effects, only a slight tingling sensation after about 10 minutes momentarily.