Get young, get better.
It works as a solution for many medical problems. Even falling sick will make you age faster through redox stresses.
Once you are 40 years old, you will never be 39 years old again. True when regarding time, but in medical science, biological age does not follow this rule. This book is a hypothesis, ready to use. Or study it more and improve this concept over time and then apply. However, waiting for this solution...