Interactions between D3 and T3

[Coppernob]

Has anyone experienced or heard of any interactions between Vitamin D3, particularly high doses such as 10,000iu/day, and T3? Thanks.

[Clutter]

Coppernob,

D3 can affect absorption of thyroid meds so it is advised to take them 4 hours away from each other.

[penny]

I've not found any problems and I take 10,000iu D3 and T3. It so happens that I do leave at least a 4hr gap between T3 (about 4 a.m.) and my D3.

[Coppernob in reply to penny]

Interesting. I think by accident I was also leaving about 4 hours between my D3 and T3. Nevertheless, I feel much better now I've stopped the high-dose D3. I'm convinced it was blocking absorption of T3, thus lowering my levels. And also making me nauseous. I know there have been several forms of D3, those issued by my GP, that I can't tolerate, whereas I can tolerate gel capsules I import from the US. Could be something to do with fillers, not just the D3 itself.