I'm so happy you included an article on hypothyroidism. I started a blog called Hypothyroid Mom because I miscarried my baby in 2009 from my doctor's lack of awareness about hypothyroidism. You bring up the extremely important point that not all of us convert T4 hormone to the active T3 hormone our bodies need. By relying on one test TSH, doctors miss many of us who have low Free T3 levels. By relying on T4 only Levothyroxine drugs, hypothyroid patients who can't convert the T4 in Levothyroxine drugs to the active T3 our bodies need so they continue to suffer symptoms despite their treatment. I am happy you brought up this very important issue for thyroid sufferers. Bravo!