1. Patients taking warfarin should not use cranberries, because the natural components of cranberries contain salicylic acid, which can induce warfarin-related bleeding.

2, cranberries contain salicylic acid, be careful not to eat with aspirin at the same time.

3, cranberries contain more sugar, and diabetics should use them with caution.

4. Cranberry can obviously increase oxalic acid level, so kidney calculi patients should use it with caution.