I've already known this to be my problem, but I dunno about 'everyone'. When I was younger I had very bad ADHD, allergies and bedwetting until I was 14 years old. There was definately an adrenal problem. Maybe it was caused by my mother having like 10 Amalgams in her teeth since she was 12 years old. She has a host or problems on her own.
And speaking of genetics, thats probably true also, I have the MTHFR gene mutation