Hi everyone! I haven't posted for quite some time but would like to know about suppressed TSH levels. Mine is 0.03 and has been for many years despite the different levels of meds I have taken. Even when I was on 25 mcg t4, going up to 300 mcg t4 and presently on 3 grains Thiroyd it's still the same. Although my TSH did go up to 35 when I was on 1/4 grain of Thyroid S for longer than I should have been and I was really unwell. I've asked my GP about my weird TSH and why it's like this but she just smiles and says she doesn't know, nothing had been done or explained so wondering if someone here can perhaps help?