Not everybody who is thin is healthy, and not everyone who is overweight is unhealthy, but eating right can improve health for even thin people who are junk food junkies. You can think of junk food as anything that’s high in calories and low in micronutrients like vitamins and minerals. This includes potato chips, greasy foods like french fries, and soda.
If you miss out on too much of the vitamins and minerals that your body needs, you could put yourself at risk for early death. A 2014 study published in the British Medical Journal found that eating at least five servings of fruit and vegetables per day was associated with lower risk of dying from any health-related cause.