On average, you'll need an additional 3,550 calories to safely gain one pound of body weight. If you're looking to put on a pound a week, that's about 500 additional calories a day. Weight gain ...

How gaining weight affects your body. You'll experience some changes, even where you don't expect. The weight you can see is only half the story. You also gain weight inside your body, around your ...

So can weight gain," she said. "The pics I'm being compared ... illness or circumstance — it's okay to live in your present body without treating it as transitional," she said.