ELI5: Explain Like I'm 5

Potassium iodide

Potassium iodide (KI) is a special medicine that can help protect our bodies from something called radiation. Radiation is a kind of energy that can be harmful to our bodies if we get too much of it. Sometimes, there can be accidents, like a nuclear power plant breaking, that can release a lot of radiation into the air.

When we breathe in air with radiation, our bodies can absorb it and it can hurt us. Potassium iodide works by protecting our thyroid gland. Our thyroid gland is a small organ in our neck that makes hormones that help us grow and stay healthy. The thyroid gland needs a special kind of mineral called iodine to work properly.

When we take potassium iodide, it helps our thyroid gland to soak up as much iodine as possible. This means that there's no room for any other kind of iodine or radiation to be absorbed. The potassium iodide also helps our thyroid gland to work better, which can be helpful if our bodies are exposed to a lot of radiation.

Potassium iodide comes in a special tablet form that we can swallow like a piece of candy. It's important to take them only if a doctor or nurse tells us to because taking too much potassium iodide can be harmful. Remember, it's always a good idea to ask an adult if we have any questions about medicine or anything else!