I have recently taken a blood test for my thyroid. My Free T3 level came back as low (3.41 and the range starts from 3.61). The doctor told me that I have a “Tired Thyroid” but would not prescribe medication just told me I need to loose weight. I need to know more information about this.\How does a thyroid become hypoactive?Is it curable?Are there things that make it worse?Is there different degrees of unbalanced thyroids, is a level of 3.41 bad? Do I need to take medication?What is the effects of smoking? Ive been reading that some people actually get an unbalanced thyroid after quitting. I have been having Green tea, nuts and drinking a lot of water to be healthy. I read online that a person with a hypoactive Thyroid should avoid these things. So what are foods that I should avoid and what foods are good for a hypoactive thyroid?Thanks in advance for your help.