If Potatoes have a purple ring are they safe to eat?

It depends on the cause of the purple ring.

* If the purple ring is caused by a bruise, the potato is safe to eat. The bruising is simply a result of the potato being damaged, and it does not affect the nutritional value or safety of the potato.

* If the purple ring is caused by a disease called bacterial ring rot, the potato is not safe to eat.** Bacterial ring rot is a serious disease that can cause the potato to rot from the inside out. The bacteria that causes the disease can also cause food poisoning.

If you are not sure whether the purple ring in a potato is caused by a bruise or bacterial ring rot, it is best to err on the side of caution and discard the potato.