"It can be really challenging in today's world for anyone—especially girls and women—to feel good about their bodies. No matter how things look from the outside, we can all be super critical of ourselves and of our image in the mirror," she told the publication.
"I've seen articles or comments that have addressed my weight, or 'caving to pressure to be thin.' Keeping weight on is a struggle for me—especially when I'm under stress, and especially as I've gotten older. That's the way my genes have decided to go, and things will change as time goes on, as does everything."
She continued, "So when completely untrue statements are made about me or my health, of course a part of me wants to defend. Thing is, people have a right to imagine what they want to imagine. My job at those moments is to tell myself the truth. Am I taking care of myself in a healthy way? Am I respecting myself and being responsible? And over and over, I answer yes to that question."
Stone also explained that she has a trick up her sleeve when she needs extra guidance during a particularly tough time.
"I remind myself to be kind to myself, and as slightly ridiculous as it may sound, to treat myself in the same gentle way I'd want to treat a daughter of mine. It really helps."