You can't choose where you lose fat first (like from your thighs or belly), but if you want to shed it quickly, "you must expend more calories than you ingest," Charles Seltzer, MD, DABOM, CEP, a board-certified bariatric physician based in Philadelphia, PA, told POPSUGAR.

The older I get, the more sit-ups I do, and the more I just can't kick my own belly fat. I'm constantly asking myself: Is it my slowed-down metabolism? The greasy pizza I like to practically inhale? Or just plain old genetics? I can't tell what is causing that stubborn fat around my belly that just doesn't seem to go away.

Stress is OK in small doses — it's our body's natural response to a threat. But if you feel perpetually like Andie trying to get Miranda's twins the unreleased Harry Potter novel in The Devil Wears Prada, it can have negative consequences on your body and mind. One of these side effects: weight gain. We talked to Dr. Charlie Seltzer, a physician board-certified in obesity medicine, to see how, exactly, stress can make you gain weight.

Coffee has a whole host of health benefits: living longer, decreased risk of heart disease and type 2 diabetes, and protecting your heart. If you drink a glass of water but then follow it with a cup of coffee, does that offset the water you just drank? We asked a doctor for answers.