Herbs are also good.

For kidneys working improving will drink a remedy of plantain, horse tail field, yarrow, nettle, flowers calendula, bidens tripartite, as all chopping, mixing and one tbl.sp. mass ads in glass of hot water, infuse hour, drink 1/3 glass for three times/day,for three weeks,ads rest, and repeat course

Or two tbl.sp. of mass  of birch buds ads in 300 ml. of water,leading till boiling, ads in thermos, for 1.5 hours, drinks warm for 50 ml for three times/day to meal for two weeks.

And this mass will improve kidneys, liver,lows sugar as 50 gr of dried kidney beans pods ads in one l. of hot water, infuse 3 hours, drinks 0.5 glass for 7 times/day within 2 weeks.

Or one tbl.sp. of herb Centaurea ads in glass of hot water, infuse hour, filter, uses for three times/day before meal for 1/3 glass till 2 weeks.

In hypertension use a herb of cudweed marsh as 10 gr of dry herb ads in glass of hot water, infuse hour, filter,drinks one tbl.sp. before a meal for three times/day.

For lows cholesterol, where having in diabetes nephropathy,as in meal ads flax seeds oil, and olive in meal, as olive oil uses one tea.sp. for two times/day,and cholesterol low are aubergines, garlic, onion, sea cabbage, almond, dill,apples.
10 perc.of propolis drinks as 15 drops for three times/day before meal till month, or 50 gr of chopped seeds agrimony ads in a dark bottle of 0.5 l. of vodka, infuse 2 weeks, uses 20 drops in 0.5 glass of water for 4 times/day within a month, as repeating this course till two times/year.

And a famous effect of oats as one glass washing, ads in thermos with one l. of hot water, infuse night, filter, and drink before breakfast for 10 days,and to this everyday for three weeks eating one cup of boiled kidney beans,as these herbs, meals will normalize a cholesterol metabolism, and control sugar level, lead to stable compenstate  for sugar diabetes,as a nephropathy diabetes can to prevent,so lead to this,therefore you will a live longer and happier...