During my college days i didn’t have any problem in gaining weight even if I eat anything and as much as i like. That’s because I have hyperthyroidism that time, it’s a condition wherein I have high rate of metabolism which burns calories and fats without any effort on my part. But since I’m cured already I gained weight a lot especially after giving birth. So I’m thinking of taking metabolism pills again to loose weight. But I have to consult my doctor first if there’s any side effect on my thyroid gland.