It makes a difference (at the very least, in terms of shielding effects) whether one is measuring alpha (helium nuclei), beta (‘nuclear’ electron), or gamma (photon). What’s more important is an educated recognition of the total and destructive failure of the “linear no threshold” LNT policy for radiation (ie none — drive it to zero).

In fact, small, chronic doses of ionizing radiation are undeniably healthy. It’s up to the savvy individual to do a bit of self-education to find out how to define “small” safely for themselves — and zero is assuredly not the answer.