Depression is in fact a well-known symptom of an underactive thyroid [1]. Bear in mind that the reference range doctors use to determine whether your thyroid i

Depression is in fact a well-known symptom of an underactive thyroid [1]. Bear in mind that the reference range doctors use to determine whether your thyroid is healthy is considered too wide by some experts [2] - this will result in false negatives. The treatment for thyroid disease and resultant thyroid underactivity is (synthetic) replacement thyroid hormone. I'd rather take a replacement hormone than a pharmaceutical drug with its side-effects. Not to mention hypothyroidism is a risk factor for heart disease and more, so better to address it than treat individual symptoms. [1] http://www.niddk.nih.gov/health-information/health-topics/endocrine/hypothyroidism/Pages/fact-sheet.aspx http://www.niddk.nih.gov/health-information/health-topics/en... [2] http://www.ncbi.nlm.nih.gov/pubmed/16148345 http://www.ncbi.nlm.nih.gov/pubmed/16148345