Nothing is a cure all. Having said that you have to put the risk factors in your favor. We all know someone with good genes that drank like a fish, smoked and never exercised in their adult life that died in their 90's. Then you have guys that are lean and run all the time that died from a heart attack. For every genetic exception there goes the majority. Being fat is unhealthy. Ever see a bunch of fat people in a nursing home? No the majority are thin.