Come to think of it, the less I took (while going slow, which I recommend to get started) the more I noticed headaches. Bad ones.
Started really slow, then hovered around 25mgs for a few weeks. Amped it to 50 from 25, then up to roughly 200mg/day. Been at this level for 2 to 3 weeks and I'm stunned.
No headaches now. No complaints which I can relate to Lugols (nothing "new"). Only regret is that I didn't bump up to over 100 earlier in time.