Urea in kidney 

In order to maintain kidney function well, you can consider the following tips The food should be high in calories and low in protein.
Salted cheese, butter and nuts should be avoided To reduce potassium content, vegetables should be cooked with more water and excess should be drained off.
Avoid fruits, fruit juices, and coconut water, also avoid canned, baked, processed and preserved foods. If potassium is restricted avoid tea, coffee, bajra, maize, raji, wheat flour, pulses and legumes, chocolates, vegetables, fruits, sauces, jam, jellies.

Herbal remedies: Punarnava mandur tablets, chicory, asparagus, tribulus, varuna etc. can be used as medicine. They not only act as natural diurectics, but also help the body to regain it's strength, help to cure anemia, assist liver function and they do not raise potassium levels either. Also, we need to revive the kidneys and help to restore their normal function. This is done by using various herbal remedies for renal failure combinations of herbs for renal failure such as Chicory, Asparagus, artichoke, Tribulus, Crataeva nurvala and others are effective herbs to revive kidneys.

Medications: To enhance kidney function you can take this Kindney Medicine Package

For further queries please feel free to ask, With regards, Dr.Vijay.