my boyfriend has been diagnosed with an underactive thyroid. He is taking medication. His sister has him believing he needs to eat a gluetin free diet, begin juicing, and other crazy things. She is not a nutritionist. She is just a health fanatic. The problem is every day he gets the chills and an overall blah feeling around 3:00. He says his head feels like it's full of cotton. I keep telling him to go see his dr. He has not seen an endocrinologist yet. Could his his current dose of medication be off or is it something else?