Hello all, I'm second guessing what I thought I should be doing. Should I be taking a multivitamin to get the RDA for RNY patients "and" taking extra Vitamin D3, Calcium, Iron and B12 "or" just taking a multivitamin with the RDA? Example: they said to take 1500mg of calcium a day...if my multivitamin provides 1500mg, is the vitamin enough or should I be taking the vitamin and an extra 1500mg of calcium? TIA