Just a few points of interest:
1. Premarin = PREgnant MARes' uRINe, from which the estrogen is extracted.
2. Drinking urine exacerbates dehydration. Urine entering the gut is a hypertonic solution that pulls water from the interstitial space via oncotic/ osmotic pressure. So, if you think you might be dying of thirst in the near future, definitely ditch this idea.
3. Throwing away any beauty products containing urea may be a bit premature. It is unlikely that the urea has originated from an animal source (unless you paid extra to have the REAL thing! LOL)
It was the synthesis of urea (an organic compound) from ammonium cyanate (an inorganic compound) in 1828 that revolutionized the field of organic chemistry. Since they've been able to do this for well over 150 years, it seems unlikely that animals would be used for this particular ingredient. Slap on the night cream and rest easy.
4. As for saving your urine in fruit jars in the basement........
The nitrogen is great for growing plants, and (unlike farmers with tanks of anhydrous ammonia) you'll never have to worry about meth manufacturers trying to steal your urine.
Trivial pursuit, anyone?