...The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently when the whole body is exposed.
https://www.fcc.gov/engineering-technology/electromagnetic-compatibility-division/radio-frequency-safety/faq/rf-safety#Q9Since the FCC may be very corrupt, i'm not sure this is true, but it is interesting, also because most budget meters we use cannot really measure this range well right ?