I have hypothyroid, specifically Hashimoto's, in addition to multi-nodular goiter. For the past 4 years I have been taking desiccated thyroid - 30 mg. Although at first the desiccated thyroid brought my TSH down, from 12 to 4., it did not work after the first 3 months. My TSH continually rose for the next few years, from 4 to 9.5. I refused to have my desiccated thyroid dosage raised. So I still continued at 30mg. Then a year ago I bought the Mito Pro 300. For the next year I put my Mito on a high table, stood 6 inches away, set the light on infrared setting, aimed the Mito at my neck, tilted my head back so the Mito light is on my thyroid. I did this for 3 minutes everyday of the week. When I started a year ago, my TSH was 9.5. Every 3 months my blood work showed that my TSH was going down. First 3 months, my TSH went from 9.5 to 7. The next 3 months my TSH went from 7 to 5. Since then I am doing the Mito infrared light for 2 minutes once a week. I stand away from the light about 8-10 inches. My blood work has been showing that my TSH is staying at 5. What a life saver the Mito Light has been for my hypothyroid/Hashimoto's. I have never stopped taking my desiccated thyroid, but never increased my dosage from 35 mg. I still continue to take my desiccated thyroid. In addition to a gluten free, lactose free diet, it was the addition of the Mito Red Light that got my thyroid working. Thanks a bunch MITO Red Light.. A most grateful and now healthy customer!