Follow - up of some infants in different studies at three, six and nine years of age revealed no beneficial effects of supplementation. (cochrane.org)
Original data derived from different studies carried out by the authors (199, 200). (academic.oup.com)
Now here it is in one (of many different studies and research papers) study more plainly stated than we have ever seen. (wholesomebabyfood.momtastic.com)