When the Iodine project doctors did all their testing, they found 96% OF PEOPLE IN THE us WERE DEFICIENT. So you can probably assume that would include your husband. It is possible that he may get some detox symptoms. However, you may find that his Parkinsons improves. " Although the evidence is weaker, Iodine deficiency may also be implicated in Alzheimer's and Parkinson's diseases." taken from a medical journal article posted at http://www.iodine4health.com.
You can go to the little search window in the upper right hand corner and put in Parkinson's disease to see more articles.