Most people who will develop a serious chronic disease in their 60s or 70s have early signals showing up in their 40s. The question is whether anyone is paying close enough attention to see them. If you have wondered what a longevity doctor actually does, not in theory but in practice, this post explains it directly. It is not about supplements or biohacking. It is about catching the slow drift toward chronic disease early enough to change where things are heading. What is lo