2 years ago I was prescribed levothyroxine for an underactive thryoid. I did some research and found Selenium to be good for thyroid problems. I take 1 tablet of Selenium, Kelp and Vit C in the morning and 1 tablet of Potassium, Vit B12, Magnesium and Calcium at night. I have had 5 blood tests and ALL say my throid is fine yet I haven't taken one of the levothyroxine tablets yet! Recently I have put on weight (Nov 07 I was 8st 2lbs and now am 9st 8lbs) I work out at a gym 5 days a week, for an hour, cardio and weights & have been doing this for 4 years. I am getting tired too. Should I start taking the levothyroxine now. My GP is unaware of my not taking them and would not be too impressed! I cannot go to them and say this as feel they will not want to treat me further. Any help offered would be appreciated. Thanks.