Quite a number of diseases come from improper diet. To say that certain diseases “run in the family” could very well be true but this is not all there is to it; there is more: Human Genes are Turned On and Off by Diet
To make this long story short, “…the expression of your genes changes based on lifestyle….” This has been known for years.
To make this a longer story you would have to do your own research.
Just so the reader knows, I often return to these pages and posts to refresh my memory and maybe add more content to that which already exists. So-o-o… The following link is for me–I don’t have the time to spare at the moment so I’ll come back to it–but of course you are welcome to check it out as well: