Question: are grapes bad for your kidneys?
Answer: Red grapes Additionally, red grapes are high in resveratrol, a type of flavonoid that has been shown to benefit heart health and protect against diabetes and cognitive decline ( 27 , 28 ). These sweet fruits are kidney-friendly, with a half cup (75 grams) containing ( 29 ): sodium: 1.5 mg. potassium: 144 mg.