 Well, yes, there's several reasons. Obviously, as we get older, we're not as active. We're not moving around as much. We're not burning calories as much. But also, as we get older, we lose muscle, and we want muscle because muscle helps us burn calories, helps our metabolism to be better. But unfortunately, as we get older, of course, we lose collagen. We know our skin wrinkles and our joints hurt, but also we lose muscle, which means our metabolism slows. And also, as we get older, our hormones change.