My OB is really focussed on nutrition, and had ordered a blood test for vitamin D along with the regular prenatal panel. When we went over the lab results at my appointment yesterday, she seemed really impressed with my vitD results (59) and that I was somehow nursing 2 toddlers, taking a regular multivitamin but no other supplements and not deficient. I guess vitamin D deficiency is common, but I hadn't thought I was likely to have it because I'm fair skinned and spend time outside every day. My iron levels were borderline, as usual for me, and so I'm taking the slow-release iron sulfate pills. I'm interested in seeing if it'll make any difference in how I feel post-partum.