I have heard this question countless times. With all the information out there on the internet, TV, books, etc. it’s really hard to know where to begin.
So an easy and simple place to start is with eating for your blood type. What’s that, don’t know your blood type? No problem! Amazon has an Eldoncard kit for under $8 and Walmart has ’em for $12.
For basic info see WebMD: https://www.webmd.com/diet/a-z/blood-type-diet
A great book to get is
I can’t stress the importance of eating a diet that’s in sync with your unique needs. Most of the problems I treat can be improved greatly, if not eliminated entirely, by eating well.