This is probably the best way to go at the moment. There are some general health advice that works for all humans (your gums are bleeding during a 6 month sea v

This is probably the best way to go at the moment. There are some general health advice that works for all humans (your gums are bleeding during a 6 month sea voyage. Eat some vitamin C). And things we were told were true but now are likely not true (eating fat makes you fat). Each personal genome and life history will have its own quirks in how it interacts with diet, exercise, sleep, etc. Maybe with individual DNA sequencing we might get some more personal insight, but the best thing at the moment might be try out some food and health ideas your ancestors used before the modern era (1900?) industrial food and marketing complex got rolling.