@StabEmwarned us about thisback in 2023. The /pol/ post(take-me-to.space) also identifies the cause: bread producers switching from iodine to bromide.
How can I get more
Buy some potassium iodide. Study up on daily iodine requirements, measure accordingly and dose yourself. Wild guess: The main constituent of Lugol's solution is probably KI. You should have some KI on hand anyway for super-dosing in case of a radiologic event. Radioactive iodine is a prevalent component of nuke fallout, and the strategy is to flood your body with regular iodine so your body doesn't metabolize the radioactive isotopes.
Lugol's solution.
Specifically buy iodized salt and mostly cook/season with it or get some supplements.
Having read up a bit more on iodine/iodide, here's some more interesting points. Elemental iodine is frequently referred to chemistry as I2 (it is a halogen - remember chlorine gas being denoted as Cl2?). Lugol's solution is frequently referred to chemically as aqueous KI3. Puzzling, eh? Turns out elemental iodine solubility in water increases with increasing potassium iodide concentrations - forms the triiodode ion I3-. I don't know it that is just an ion of convenience for stoichiometric accountancy, or if it actually plays out that way in real life.
So what needs to be ferreted out yet is whether it is the I3- or just the I- ion that is metabolized in the human body. So there's a piece of the puzzle, but we still need a couple more...
(post is archived)