Does anyone have any advice for me? I have ALL the symptoms of underactive thyroid and have been suffering for years , but blood tests always come back normal. Recently the ENT doctor suggested I ask for a referral to an endocrinologist, because my voice is so hoarse. She ordered another blood test, and I came off kelp for 8 days before the blood test. By that time I felt so bad, I forgot to start taking the kelp again for a few weeks. My hair fell out, I got coarse, dry patches on my skin, I put on more weight, my voice got much, much worse, worse constipation, so tired I could barely move, terrible depression, etc. Then I started taking kelp again and immediately began to feel better. Has anyone been diagnosed with underactive thyroid even though the blood tests are normal. Kelp helps, but only so much.