underactive thyroid
"I've been taking Synthroid since October 2010 for my underactive Thyroid and am also a type 2 Diabetic.  It is now February 2011 and things are wonderful.  After about two weeks, my mood improved.  After 6 weeks I was able to get a haircut (prior to this my hair kept breaking off at the ends) and my hair shines again.  I've also lost a total of 15.5 pounds and counting.  My doctor says it's because the Synthroid has corrected my metabolism.  No bad side effects to date (fingers crossed for the future too).  I am on a low dose...25mg. Monday through to Friday only...Weekends off."