Obesity is on the rise worldwide, but researchers still don't fully know why. We look at how weight gain sneaks up on us, if our genes are to blame after all, and why our parents leave us a lifelong legacy if they are obese.
The thyroid has a big job: The hormones it secretes help regulate heart rate, maintain healthy skin, and play a crucial part in metabolism. When the gland is sluggish (hypothyroidism), it can rob you of energy, dry out your skin, make your joints ache, cause weight gain, and kick-start depression. When it becomes overworked—hyperthyroidism—and produces