Hi Zack, your urine is custom medicine just for you. So whatever is going on inside you causing the too skinny issue will likely be addressed.
Follow the guidelines set out by books by John W Armstrong, Coen Van der Kroon, and Martha Christy.
Besure to try the external application of massaging the older urine into your skin.
Start slow, listen to your body.
Interesting interview here: https://m.youtube.com/watch?v=IEPrB6x02CI