It varies slightly from person to person, but generally “lots of vegetables and minimize highly processed foods. Those are the common denominators of a healthy diet. From there, you can fill in the blanks to suit your tastes and your unique physiological needs by adding your choice of high-quality fats (nuts, seeds, avocados, olive oil, fatty fish), carbohydrates (whole grains, fruit, starchy root veg­etables), and plant- or animal-based protein (legumes, soy, fish, lean sustainably raised meat, poultry, eggs, dairy).”

https://www.health.harvard.edu/staying-healthy/what-does-a-h...