It is possible to lose weight by sweating, but sweating may not be able to lose weight. Like L-carnitine I eat, I lose weight by burning fat, and at the same time consume energy to achieve the effect of losing weight. Sweating and thirst are normal reactions, so you need to drink plenty of water to replenish water. I'm using L-carnitine. Taomei customer service explained it to me. I also saw that many people have it on the Internet, which is normal.