Norway also advises residents to stock up on essential medicines – including iodine tablets, in case of a nuclear incident – and, like Sweden, recommends that people have several bank cards and keep a ready supply of cash at home.
Iodine is something that's hard to get in modern diets, which is why salt is iodized.
Our body uses it in our thyroid, and atomic weapons send out a shit ton of fallout. A significant amount is radioactive iodine, which is going to be hanging around for a while.
If your body picks it up, you now have a radioactive element accumulating in your throat, which is a pretty bad place to store a radioactive mass.
If you don't have iodine tablet, eat a crazy amount of iodized salt. You want to make sure if your body runs into radioactive iodine, it's already full up and can't hold anymore.
But the high blood pressure from salt might kill you decades later.
A radioactive thyroid would make you wish for death as your lower jaw rots away and eventually falls off.
Don't half ass it because of a fear of heart disease. A large dose kills cells in your thyroid (still terrible) a moderate dose wouldn't kill the cells but almost guarantee rapid onset cancer.
It's why the tablets aren't "enough that your body needs" they're "a literal insane amount". Like take your daily requirement times 3-5 years level of crazy.
Also, I'm pretty sure they have an expiration date. If it's life or death, I would not trust them very far past that date. I don't think they'd be harmful, just less effective.
I also have a few vials of liquid iodine. But it is harder to dose properly.
Unless you are directly in the path of very recent fall out (within 8 days) as an adult those pills probably won’t do much for you. By the time you start seeing the effects of radiation you’ll be in your 70s.
If you have to ration iodine pills prioritize kids and teenagers and young adults. They would live long enough after the event to deal with cancer and its affects.
You can expect KI to expire like NaCl does.
The filler might be not ok after a long amount of time, but the KI will be and that's what saves your thyroid.
Here's some info regarding dosage:
Iodide ion, as present in KI, does not decay. Period. It’s that ion that your body requires. The tablets would serve their purpose for long after they are purchased.
As a chemist, I will go ahead and inform you confidently that Potassium Iodide in a dry place will outlast you by a significant margin. It's very chemically stable.
Probably to account for people who won't store it properly, degradation of the packaging material, etc.
For example, if you store your blister pack of KI on a sunny shelf in your bathroom, UV rays eventually weaken the plastic packaging, cracks develop in the plastic letting in water vapor from your shower, and a stray mold space makes its way in as well and eventually you end up with mold growing on your pills. The KI itself may still be perfectly fine and able to do its job, but that mold might make you sick.
Idiodin itself can't get "bad" in any way. The carrier material might go bad, but that's also just starches and a few mineral compounds. At worst, you get powder instead of a pill.
The expiration dates on medication are intentionally extremely conservative.
That's not true at all. Fallout can be carried by wind over very long distances. And even a small amount of radioactive iodine accumulative in the body can be an issue.
It's more the fact that a war situation where nuclear weapons are used so frequently that the average person will need tablets will also see shortages of food, water and created large flows of refugees.
Basically every bit of modern infrastructure would collapse, which would be far more impactful and urgent than iodine pills.
where nuclear weapons are used so frequently that the average person will need tablets
All it takes is one nuke to go off and winds to carry the fallout to relatively stable countries far away.
But let's say that you are dealing with some level of societal collapse from nuclear war. You still need iodine. Without it, it won't matter if you secure food, water, and shelter, because you'll get some aggressive cancer and die anyways.