The previous post discussed the crisis presented by vitamin D deficient breast milk furnished to nursing infants by their mothers. We established that the recommended amounts for supplementation are woefully inadequate to take care of the illnesses in children (rickets, autism, etc.) that are being caused by low vitamin D levels in breast milk. We also made it clear that breast milk is the perfect food for infants, but only if it has adequate vitamin D. So how much vitamin D is necessary from sunlight, tanning beds or supplementation to assure optimal vitamin D levels for both mother and child?
This is critically important information: Nursing mothers need at least 6,400 IU of vitamin D3 daily.  That amount can be easily produced by full-body exposure to summer sunshine in a few minutes, or a tanning bed (never burn) can also produce vast quantities of vitamin D in a short period. For those who wish to avoid the sun at all costs, supplementation is essential. Remember that in northern climes, there are several months in the winter where little or no vitamin D is produced by exposure to sunlight. In such areas, either sun lamps or supplementation are critical to the health of the infant and mother alike.
 Wagner C. et al. High-dose vitamin D3 supplementation in a cohort of breastfeeding mothers and their infants: a 6-month follow-up pilot study. Breastfeed Med. 2006;1:59-70.