I don't think you need a branded vitamin but pregnancy safe vitamins are a good idea. I was wrongly told by my midwife that with my pale skin tone I didn't need to take VitD supplements. Babies can't process sunlight in to vit D the same way as adults so they get a lot of it from breastmilk. My Toddler is now Vit D deficient (obvious because of significantly knocked knees) and the paediatrician blames the inaccurate info I was given about my skin tone while breastfeeding, because we basically live too far north and with too much of an indoor lifestyle for any of us (where I live) to have sufficient vitamin D in the winter! However some vitamins are fat soluble (so you don't pee the excess out, you store it in your fat) so some of these can build to toxic levels if you take supplements when you are getting loads from natural sources. That's why the paediatrician has recommended that LO and I take vitamin D supplements, but ONLY in the autumn/winter.