How a mother’s Vitamin D status influences her breastmilk levels

The prevalence of Vitamin D deficiency in breastfed babies differs vastly between studies and nations at 0.6% - 91.1%! Breastfed babies are (or can be) ‘particularly vulnerable’ because breastmilk doesn’t naturally contain high levels of Vitamin D. Combine this with a mother having low Vitamin D levels herself, it further reduces the amount that passes through breastmilk.