But it is good for you (not because it's free).
I discovered Urine Therapy during a yoga teacher training way back in 2008 and was very sceptical myself, but after much research I decided to try it, and over the last 16 years have practised quite often, especially on the very rare occasions I get sick.
I encourage you to read some of the links and research for yourself.
Peace & Love.
RE: علاج التهابات اللثة وتقرحات الفم Treating Gum Inflammation and Mouth Ulcers