does nettle leaf have any benefit to patients with kidney problems?
Stinging nettle is used for many conditions, but so far, there isn't enough scientific evidence to determine whether or not it is effective for any of them.
Stinging nettle root is used for urination problems related to an enlarged prostate (benign prostatic hyperplasia [BPH]). These problems include nighttime urination, too frequent urination, painful urination, inability to urinate, and irritable bladder.
Stinging nettle root is also used for joint ailments, as a diuretic, and as an astringent.
Stinging nettle above ground parts are used along with large amounts of fluids in so-called “irrigation therapy” for urinary tract infections (UTI), urinary tract inflammation, and kidney stones (nephrolithiasis).
Stinging nettle leaf has a long history of use. It was used primarily as a diuretic and laxative in ancient Greek times.
But remember, there is still not enough scientific evidence to support any of the above mentioned uses.