I'd say that its completely possible. We simply have to start giving the body what it wants and needs so that it can heal itself. We have to get out of the way (the 'self' our flawed, conditioned thinking) and stop doing the bad things.
Most everyday conventional doctors are not the people to ask. Forget Mayo Clinic, the AMA etc etc.
Stay away from anything that a pharmaceutical company creates, they dont care about you. They care about dollars PERIOD. (It may in some cases be important to slowly wean off these if they're already in use, of course)
It would mean staying away from any animal products.
100% strictly organic plant based diet with across the board lifestyle changes. No drinking, smoking, high stress environments/relationships.
Daily rebounding and regular yoga and meditation if you're into that (im mot and dont recommend it)
Very, very clean water that is restructured to the way nature makes water.
Organic, food based supplements that dont have in them the common fillers and binders. Life Extension is off the list and shouldnt be taken by anyone, back to my comment about pharmaceutical companies! been there done that, these synthetic ingredients are met by the body as an invader and treat that way, I ended up with a very low white blood cell count from synthetic supplements, beware!
Regular mindful sun exposure, sweating.
Its about, as Dr. Gabriel Cousens says "Living the culture of life, rather than the culture of death"
Joy is important, doing work that you truly care about and are passionate about. Relationships that are healthy, a life filled with real food, real things, the good stuff.
There are many great videos to be seen from The Real Truth About Health channel on Youtube...heres a starter...
https://www.youtube.com/watch?v=Tu4UF8RoOsY