last jan 12, 2007, i undergo I-131 treatment for hyperthyrodism or in other words radioactive iodine to treat my grave desease. my weight then was between 95 to 105lbs. at present, i am now 126 lbs. and getting bigger because i am now hypothyroidism and i am taking levothyroxine 75 mcg everyday. the last time i had my tsh was at .40 taken last jan 15, 2009. is there any alternatives that are natural or should i stop taking levothyroxine because i'm getting bigger and bigger and i feel so tired or not energy practically almost everyday. can somebody give me an advice please....