What is the best way to avoid diseases?

Eat less/exercise mo: The secret to a long healthy life is daily exercise(walking is good) and eating healthy so that your weight is normal. Healthy foods are those which are low in fat and refined sugars. So avoid all fried foods and rich deserts and sugary drinks. Healthy foods are plant based like veggies, fruits, nuts and soy products. Fish and egg whites are good source of proteins which you need to eat regularly.

Longevity: Stay active, eat healthy meals, life-style changes & cope with stress the best u can.