Our cells, if healthy, are programmed to die a natural death within a certain time. This process is called “apoptosis.”
When our cells grow wild and don’t die on time, we have cancer. Iodine promotes apoptosis or normal cell death.
But the "required daily allowance (RDA) is not enough for iodine dependent tissues of the thyroid, breasts, ovaries, uterus and prostate gland. Daily preventive adult doses range from 6-50 mgs/day for the vast majority of adults. Iodine levels can be measured by checking blood, urine and/or saliva." (From the book, Iodine, Why You Need It and Why You Can’t Live Without It, 3rd edition, page 160 by Dr. David Brownstein.)