Personally, I still take a mulitvit. The simple reason for this is that, yes, CD contains 100% of the RDA of vits and minerals, BUT the RDA is not necessarily enough to support your immune system. For example, the RDA for vit C is 60mg. This is based on the figure needed to stop you getting scurvy, but not enough to help protect you against colds, etc, where you need at least a couple of hundred mg a day.