Water fasting, what was your experience?

I am an usual poster in another forum of similar ailments (adrenal fatigue, prostatitis, all those conditions allopathic medicine deny or say they are not treatable)

Yesterday a guy came and posted he cured after a 90 days water fasting?? He said he cured his adrenal fatigue, diabetes and ED. WTF was everything I could say. Everyone told him 90 days fast its a sure death.

So I was curious to see if anyone with adrenal fatigue,leaky gut or that is severely nutritionally defficient and toxic like me can do fasting, and if it helps. I am underweight as well, 178 cm tall and 60 kg, looks like losing weight every month... :(

What was your experience with water fasting, if any? Did you have adrenal fatigue, leaky gut, underweight when you did the fast?

Thanks!