Brothers, I have a folk remedy for treating kidney deficiency that local men are using.

My second uncle used to have back pain, weak legs, frequent urination, and urgency, and his wife almost left him.
Later, an old shepherd told him: two handfuls of black beans, one pig kidney, half a bowl of high-proof white liquor, stir-fry them dry in a pot without water, until the black beans crack and the pig kidney smokes, eat while hot.
After my second uncle finished eating that night, he woke up eight times during the night.
It wasn't frequent urination, but nosebleeds.