I read and understood you just fine...one of the reasons I mentioned PATIENTS. From what I have seen in about ten years of practice is that first, it is VERY RARE to reach that age and not be on any medication at all. If you are black or hispanic, you might as well forget it and count yourself one of the very few if you pull that off. This is largely genetic.
Second, I do not see any heavy super old people. I remember one patient over the age of 75 who wasn't on any meds (he was black by the way) but he also stood out as being extremely thin. I don't know many Marines or truck drivers or even random soldiers or big weight lifters making it to that age with no complications whatsoever.
In other words, if you want to make it to 100...
be from a family of many people who make it to that age.
Stop eating and get really skinny....like rail thin skinny.
Ask fate not to kill you until the very day you reach 100.