It is safe to eat and it still have some nutrients on it like potassium,Iron and Niacin. I just wash them in running water until I get rid of all the dirt and I either fry them or bake them. They make delicious and crispy chips. That is some delicious side dish or snack you can get for free. In some recipes like stew, I don't bother to peel the potatoes. It is additional nutrients for me.