In this book, information regarding the impacts as well as treatment of the disease of hypothyroidism has been provided. The disease hypothyroidism poses a much bigger challenge to mankind than estimated in studies and reports. It is the most prevalent thyroid disorder and many people remain affected by it without even being aware. The most common symptom of this disease is slow metabolism. This disorder's estimates in its subclinical manifestation vary from 3 to 8%, and it increases with age. It has been commonly observed that it affects women more than men with its rate as high as 10%. Hypothyroidism affects lipid metabolism, neurological disorders or other medical situations. This book encompasses researches on the evolution in diagnosis, regulation and exchange treatment, thyroid ultrasonography and radioiodine therapy for hypothyroidism. The book comprises of a lot of significant characterizations, end results of analytic researches and innovative strategies for endocrine practice.