How do EMFs affect the human body?

Exposure to EMFs may cause several biological effects at the cellular level.  Studies have found that these effects may include DNA damage (Source), excess intercellular calcium (through the forced opening of voltage-gated calcium channels) (Source), a degradation of the blood-brain barrier (thus allowing toxins to enter the brain) (Source), reduced melatonin production (Source), reduced antioxidant production (Source) and an increase in stress hormones (Source), among other things.