in June 2012 and I have been on Thyroxine 125 for a year. Free Thyroxine level 20.3 (normal 9-24) T3 1.6nmol/l (normal 0.9 - 2.8) Thyroid stimulating hormone 0.25. Synacthen test normal. Vit D very low and Calcium low so Im on an 12 wk course of Vit D and Calcium. Any advice would be helpful.