Here are 5 research papers showing Iodine deficiency causes retardation. Iodine in autism spectrum disorders (2016) https://www.ncbi.nlm.nih.gov/pubmed/26854242 Key Quote: “RESULTS:19 out of 40 children with Autism Spectrum Disorders (ASD) had mild to moderate iodine deficiency.” Iodine Deficiency and Autism Linked in Research (2015) https://www.globalhealingcenter.com/natural-health/is-there-a-link-between-iodine-deficiency-and-autism/#1 Key Quote: “some research has shown a potential link between iodine … Continue reading Iodine Deficiency Causes Retardation. High Iodine Causes Geniuses.