normal t3 and t4 levels but low tshlow tsh and normal t4high tsh levels normal t4low tsh normal t4 on levothyroxinelow tsh normal t4 on synthroidlow tsh levels normal t4high t4 low tsh after thyroidectomylow tsh high t4high tsh normal free t4normal level of t3 t4 and tshhypothyroidism tsh and t4 levelselevated tsh low t4
