The medicinal value of Gomutra/cowpiss is best when it is fresh.. stored one dangerous..
I am a Biomedical Scientist and any Biochemist knows that Urine, whether from Cow or from any other living being has no medicinal value of any sort. If urine indeed had any medicinal or therapeutic or nutritive value, the body would have never let it go in the first place. Urine's medicinal value is only in the head of those who want to believe it has some value just like certain Chinese wish to believe that Ginseng root is good for health, or the Bird Nest soup is beneficial, or acupuncture does wonders. There is practically nothing good found about these wonder medicines when tested in well designed assays or pre- or phase 1&2 clinical trials. Please get over this obsession.
A lots of people in this world use Ayurvedic Medicine .AFAIK some ayurvedic medicines have cow urines as integrident at least in mild terms.