Another bad way to lose weight is taking slimming pills or appetite suppressants, especially those with dangerous side-effects and are unapproved by FDA. Experts suggest that most slimming pills are nothing more than a quick fix loaded with caffeine and diuretics that lead to dehydration and gastrointestinal problems.

Other side-effects include dizziness, insomnia, constipation, nausea, anxiety, bladder or kidney stones and even liver damage.