So many odd physical conditions ended up being the result of dehydration and went away once I started drinking water throughout my day. I was in my 30s when I learned that one.
And for other people reading this threat - always have a water bottle standing next to you! For me it was a bit game changer to have water quickly accessible. I've also implemented a tradition of drinking a bottle every morning - that immensely helps in getting your body active.
Only downside is that you'll go to the toilet often.
Hmm, I never suffered any conditions when I was chronically mildly dehydrated. I haven’t noticed any benefits after 2 years of being slightly over-hydrated.
The big ones for me were joint pains, chronic headaches, and cramping that made me feel like I needed to take a painful crap. For some strange reason, that last one only occur in the middle of the night and it would last for a good hour or so.