From the American Thyroid Association, anyone over 40 years old should think twice about taking potassium iodide over fear of how it affects the thyroid gland.
The iodine tablets only protect the Thyroid gland. No protection from the Alpha, Beta, and Gamma radiation on your body. Not very useful in a major fallout scenario. Maybe for children, Nagasaki and Hiroshima showed children with major thyroid illnesses later in life, not so much for adults.
Better to buy a Dosimeter to see what your total Rad intake is….200 rads you are walking dead, and don’t know it. Aeroflot commonly provides flt crews flying at altitude ( 32-40K ft) dosimeters to monitor their radiation intake at those altitudes.
I have a whole bottle of povidone iodine I use for a mouth rinse. Curious if that can be taken in a diluted form.
I read the article, I didn’t see anything about people over 40 being “affected” by KI. It just said they don’t need it and didn’t say why. Seems odd that over-40’s, particularly the more elderly, would not need it.