good for you...I am 81 and qualify as the lower part of the superager group. OVER EIGHTY starts this. It is only because a part of the CORTEX in the brain has an extra covering that is thicker than most others. SCIENTISTS are trying to figure it out. LET THEM. BIG PHARMA has a lot of PHONY SO CALLED MEDS to extend the lifetimes of people and it is all FAKE. No one has found anything that does one iota for the aging process. All I studied about it says do not drink smoke or worry and you will live longer and eat a lot of vegetables to keep the weight down. I do that. 81 and having fun. GOD BLESS YOU AND YOUR LONGEVITY...Margaret O