My endo said I have low T4 at 13 (it shouldn't be lower than 12 with their range.) But my TSH is 0.3. She put it down to me being on NDT (Thyroid-S) she said NDT has too much T3 & not enough T4? But I've been taking both Levo & NDT together so I don't think it's that. I tried being on both separately but that didn't work & I developed sinus problems & constipation. Now she's put me on T3 Lio with my Levo.
I can't figure out why my T4 won't get higher. I take vitamins, B, D, iron, eat fruit & veg. Could it be my body just can't absorb T4 but then why is my TSH low?