Hi all. I just read on the thyroid forum on About.com that one should wait 6 hours after taking your thyroid meds before you take calcium supplements or multivitamins. I have only been waiting about 2 hours, if that. Does anyone know what problem this would cause? I take so many supplements during the day that I'm starting to feel like a guinea pig! Anyway, any enlightenment would be appreciated. P.S. I do take extra calcium, evening primrose oil. a multivitamin, extra B and potassium. Cheers, Lara