Guess what? I just found out that my wife's sister who died of breast cancer had her 1st warnings of severe iodine deficiency 20 years earlier. She could not sweat. If you know anyone who can't sweat, they need iodine ASAP. It is an emergency situation! Unfortunately, no one knew then what we know today.
When you are talking about iodine deficiency with your friends, always preface it with Doctor Reports say, "......" We are just parroting what the best doctors in the USA are saying. Otherwise you will be talking to a brick wall.