Vitamin D is very important but I'm curious to read more than one statement about EMF altering metabolism, many people believe this but no tests I know of have been done which prove it has any measurable effect on our metabolism in normal levels.

I once was sleeping in an underground power distribution room for the ventilation/lighting system in a road tunnel. I don't think it affected me in any bad way, though on the rare occasions at the time that I ran into some weed, I swear I could feel the 50hz from the power (it was probably about 50KW or more) as a gentle twitch in my muscles... but I only felt that when I was stoned, so I don't know exactly how much was touch and perhaps instead was just my brain allowing sound signals to synaesthaese (hm) into touch sensation.