If it goes hypo (slow or what is known as hypothyroid) then we gain weight for no reason. Symptoms of an insufficiency can be lethargy, tierdness (all the time, but wores in the afternoon), forgetfulness, mental dullness and at its worse, .... In my book, HELP and Homeopathy (availalbe on my website) I cover this and many othre acute ailments thta can injure or kill a person. When I was an EMT, I wroet this book with Gail Derin, OMD and EMT. She too, is a homeopath. ...