How Not To Die

“The vast majority of premature deaths can be prevented through simple changes in diet and lifestyle. In How Not to Die, Dr. Michael Greger, the internationally-recognized lecturer, physician,
and founder of NutritionFacts.org, examines the fifteen top causes of
death in America—heart disease, various cancers, diabetes, Parkinson’s,
high blood pressure, and more—and explains how nutritional and lifestyle
interventions can sometimes trump prescription pills and other
pharmaceutical and surgical approaches, freeing us to live healthier
lives.”

https://nutritionfacts.org/book/

Found the app Daily Dozen on F-Droid. The list of things to eat is in line with most nutrition information you hear, but the book looks worth a look.