A recent presentation by a physician systematically and scientifically went through each of the top causes of death in the USA.
Almost every single cause could be treated or even reversed by the same simple solution. The solution is easy, available to anybody who wants it and isn't expensive.
Considering the enormous, positive economic impact that such a solution would have (through reducing sky-rocketing health care expenses), it is amazing that there is not more discussion about this in government and at a personal level. (The video does mention that there are vested interests that would lose out.)
The presentation is logical and fun to watch, though to see it all (it is worth it) takes about an hour. I hope you can set aside a bit of time for it.
It is your own health.