Hair

What if everything you’ve been told about hair is wrong? Graying, thinning, and loss aren’t simply cosmetic concerns or an inevitable part of aging—they’re signals. And in many cases, they can be understood—and sometimes changed. In Rebellious Aging Guidebook: Hair, Dr. Robert Peterson draws on decades of clinical experience to challenge conventional thinking about hair health. Blending insights from dermatology, endocrinology, and molecular science, he explains why hair changes with age—and what modern research reveals about reversing or slowing these processes. This guidebook offers a clear, evidence-based approach to understanding hair, evaluating treatments, and distinguishing what is clinically proven from what is simply marketing. Aging is unavoidable. Decline doesn’t have to be.