A Yale-sponsored study of post-menopausal women found that facial wrinkles can indicate what's happening in the bones. The deeper the wrinkles, on a scale from one to six, the bigger the chance of bone disease.
They have the same collagen. So when the collagen breaks down and we lose bone density, the collagen in the skin, which we can see, breaks down also and causes wrinkling and other changes in the skin thickness," said
This discovery may eliminate the need for bone density tests. Instead, researchers say a doctor may be able to identify who's at high-risk of bone disease just by examining their patient's face.