Dunno about all this.
My closest buddy was a health and fitness buff who exercised, ate health foods, and took vitamins every day. I thought he would live well past 100. One day he felt sick, visited the doctor, was informed he was in peril, was viewed on the surgeon's table, and doctors gave up on him immediately. Despite all his past efforts to take great care of himself, he died just after his 40th birthday.
Some times, the best laid plans of mice and men go awry. So yes, take the very care of yourself that you possibly can. But it is no guarantee that you will always be well.