Kidney & Bladder

This section covers urinary and kidney health. You will find reviews of bladder control and urinary tract supplements, plus explainers on hydration and kidney function.

We compare ingredient doses with human research and point out where evidence is limited. Because the kidneys clear many substances, we also flag high dose minerals and herbs, and we check refund policies.

Ask your doctor before use if you have kidney disease or take blood thinners. Painful urination or blood in urine needs medical care.

Can cranberry products help prevent urinary tract infections?

Cranberry products may help lower the chance of repeat urinary tract infections in some women, but the evidence is mixed. Cranberry does not treat an infection that has already started. See a doctor for burning, fever, back pain, or blood in your urine. People taking warfarin should ask a doctor first.

Source: Cranberry, NCCIH