Hello again. I wonder how many people on here take Magnesium. I have been type 1 on insulin for 40 years and hypothyroid for two and a half after a thyroidectomy. I am currently on large doses of Vit D for my deficiency at 25000iu twice a week. I see on here K2 is recommended when taking D3 and this also seems to link to magnesium. I have gone from under ten stone to 16 over last 5 years and am hoping my recent addition of T3 at 5mcg twice a day is going to help. I take 125 Levi in week and 100 att weekends and reverse T3 is 27. Is it possible I should take magnesium too? Is it dangerous if you don't know your levels? I don't.