What dose were you on when you crashed? Were you doing the salt push on a regular basis throughout the day, and according to your detox signs and symptoms? Were you taking selenium, mag, Vit C, B2, B3, alongside the iodine? Were you taking Lugol's, or another form, like Nascent? I have been able to reduce my adrenal steroids and my thyroid meds on Lugol's. It happened naturally, but not until I'd worked up to 50mg/d, and I'd gad some fairly crappy detox symptoms. It certainly hasn't made me hypo, although obviously different people will have different responses to the same substance. Is it possible that your crash was in fact some hefty detoxing? Or caused by some hefty detoxing? I'm still detoxing, at c.100-140mg/d. I know I am, bevause I'll start sweating for no apparent reason, get a huge headache, feel sick, develop a rash (latest is on both cheekbones), and my pee changes colour. It can be actually brown, which is alarming - very def NOT dehydrated, drinking 3L plus water/d, and I more than pass the pinch test. I tried taking 1.5mg iodine kelp tablets a year or so ago, and felt diabolically unwell on them so I gave up. I didn't know about all the halides then.