Is There a Better Way to Age Than a 35-Year-Old?

He has converted his home into a medical facility because the testing that they do on him is not possible except in the most high tech medical facilities. His goal is to have the body of organs, the internal structure that would be measured equivalent to an 18 year old. If you could get someone who is measurable in all those organs, just as a 35 year old as opposed to 45, if you could just have a 10 year shift in measurable fitness for your body, it would it would be revolutionary.