How can you tell if your cranberries have gone wrong or are spoiled? When cranberries start to spoil, they become soft and mushy, and their color fades; if mold forms, or if the cranberries have an off odor or appearance, toss them out. When ingested in moderation, cranberries and cranberry products are generally safe for most individuals. On the other hand, excessive consumption can produce stomach discomfort and diarrhea and raise the chance of kidney stones in those predisposed to them.
Cranberries are a berry that is native to North America.