One of the problems with many of the easy diets listed is that they include a lot of processed foods. Frozen products and microwavable meals are generally not as nutritious as a home-cooked meal. And if you get used to eating foods like brownies and chocolate shakes when you're slimming down you may continue to crave those foods after the diet is over. And of course, if you consume non-diet versions of those foods, the pounds will come back.
Two appetite suppressants - sibutramine (Reductil) and rimonabant (Acomplia) - were taken off the UK market in recent years. Both went through clinical trials but once people widely began using them, dangerous side-effects were reported. Side effects from one drug included making the people taking them feel suicidal, while another drug increased the chances of having a non-fatal heart attack or stroke.
In what is perhaps the biggest buzzkill of all time, sex doesn’t quite count as cardio or burn a significant amount of calories: Women burn about 3.6 per minute. "It’s still a good idea," Dr. Seltzer says, citing the activity’s other benefits, like increasing the output of the neurotransmitters serotonin and dopamine, which naturally reduce food cravings.