Hi, Yesterday I saw the GP (it's never the same one twice) about resuming injections for my low B12 for which he was reasonably helpful. I also asked about upping my 50mcg of levothyroxine to 75mcg as my tsh is 3.88 (in range but not optimum). He was adamant that to do so would be very risky to the health of my heart (as far as I know my heart is fine). I ventured to say that there is controversy about that and also about upping the risk of osteoporosis and he was NOT happy ! He said 'I'm not bothered about osteoporosis but do you really want to damage your heart ?' I'm due more blood tests (1st appointment for these a month away! ) and will follow all the rules to make sure the tsh is as high as possible but am fearful he'll want to keep me on 50mcg. I've researched his view about heart damage but can't find anything so don't know what to think. Is he right ?