When we usually talk about the signs of aging, we’re normally only going as far as skin-deep. However, we all know that age starts to affect a lot more than just our skin. They might be the most visible signs of aging and, thus, the ones we’re most anxious to squash. But that doesn’t mean that they’re any more important than what’s going on inside the body and in ways that others can’t quite as readily see. If you’re starting to notice the first signs of aging, here are some changes you need to prepare for, and how to keep them at bay for a while longer.