How long did u take 100mg without selenium ??????
and how do u knnow that u r hyper? Just by having an elevated heart-beat?
Hmmmmm i m not sure but i ve also had some higher pulse as i ve started to up my dosage back in 2013.
Maybe its just an adjustment of ur body.
Unless u took Iodine
100mg for half a year or so.. without ever taking Selenium.... then i d guess it can have bad effects.
Iodine is an oxidant where as selenium is an anti oxidant...same as vitamin c.... its important to take them together ...
magnesium is also another co supplement of the Iodine
Do u take the other co nutrients? B2 and B3 helping with the sodium Iodine
symporter (pushing iodine into the cells)
also... did u just start taking 100mg or started slowly? maybe 100mg were too much for u and ur body is a bit "shocked !" now. I knnow there r ppl that support the 100mg dosage from the start. But i guess ppl r still reacting different.
I ve "slowly " increased my dosage in the first 6 months 12,5....50....100 ...
Now (and since a year or so ) i feel absolutely nothing when i take 100mg . I can even take it in the afternoon/evening and sleep afterwards.
Hope some of the "oldies" here reply to u as well :P
best wishes !