✔ 最佳答案
Why can't you? There was a man not long ago who, under the supervision of his doctor, ate only potatoes for a month in an effort to lose weight and it was successful. Potatoes are a good source of fiber, potassium, magnesium, iron, vitamin c, and vitamin b6 as well as having some protein. They're also low in sugar (although they're higher in carbohydrates which can metabolize as sugars)
I don't recommend ONLY eating potatoes as you will be missing some essential vitamins and minerals for a healthy and balanced diet -- but eating a potato a day (or even two) isn't unhealthy.