Who should not take cranberry capsules?

Cranberry capsules should generally be avoided by individuals who are allergic to cranberries or have a history of oxalate kidney stones, as cranberries can increase oxalate levels. People taking blood thinners, such as warfarin, should also consult their healthcare provider before using cranberry products, as they may interact with these medications. Additionally, those with Diabetes should be cautious, as some cranberry supplements may contain added sugars. Always consult a healthcare professional before starting any new supplement.