It increases your metabolism.

I really don't know how caffine pills can be used for weight loss. But I can give you advice that if you're looking to lose weight, pills aren't the answer. You need to excercise... ya I know it sucks but staying hydrated and not having an eating disorder are the most efective ways to stay healthy. Don't overwork yourself or I heard you could have muscle problems, but in summary, you really shouldn't take pills to lose weight.

Yes but don't.