Here I go again on another nutrition question. Aida asked if breastmilk is in fact missing any crucial nutrients. According to Nutrition During Lactation, regardless of what the mom eats, to ensure adequate nutrition for the BF infant, they recommend all newborns receive a 0.5 - 1.0 mg injection or a 1.0-2.0 mg oral dose of vit K immediately after birth regardless of feeding method. If exposure to sunlight appears to be inadequate (< 30 min. exposure to sunlight/week in a diaper or 2 hrs/week if fully clothed w/o a hat), supplement with 5-7.5 mcg of vit. D. Provide Fl supplement to BF infants IF Fl content of drinking water is less than <0.3 ppm. When BFing is complemented by other foods and by 6 mos. of age, in any case, the infant should be given food rich in bioavailable iron or a daily low-dose oral iron supplement. I think we need to keep in mind, is that it can take a long time, sometimes years, dependent upon the nutrient, for a deficiency to develop. I opt for the safe side. My VERY humble opinion. Debbie McClurg-Hitt, RD