Mr dr just told me after my wife and i had our yearly physicals that we are vitamin D deficient. We both take multi vitamins containing vitamin D, hers has 800IU's ( womens vitacraves chewables ) and mine has 1600 IU's ( GNC mega Man sport )……how is this possible if the RDA is 700IU? Should we take more vitamin D on top of our multis like our Dr. told us too? It seems like alot. Please advide. Thank you .