I'm new to this so maybe someone can enlighten me as to the difference between TSH and Ultrasensitive TSH. What's the desired goal level of either? I was told for non-cancer patients it's a TSH between 0.4 and 4.0 (I'm not sure what that translates for Ultrasensitive TSH), but with cancer patients the TSH should be between 0.3 and 3.0. Further confusing is that my doc said I'm "high risk" and need to be at 0.1 or less. Does an increase in thyroid medication result in the TSH numbers decreasing? If so, I'm in a fix as I feel horrible on this medication and would like to take as little of it as possible - regardless what it does to my numbers! Any enlightenment would be appreciated.