Vitamin and Mom vs Baby

Vitamin D and MOM--

During lactation: Adding a vitamin D supplement to mom's diet and/or exposure to ultraviolet light will increase the amount of vitamin D in her breastmilk. As long as mom is not vitamin D deficient, her breastmilk will have the right amount of vitamin D. However, babies were "designed" to get only part of their vitamin D from breastmilk and the remainder from sun exposure - what if baby does not get a minimum amount of sun? A 2004 study [Hollis & Wagner 2004] determined that supplementing the mother with 2000-4000 IU vitamin D per day safely increased mother's and baby's vitamin D status: the 2000 IU/d dose resulted in a limited improvement, and "A maternal intake of 4000 IU/d could achieve substantial progress toward improving both maternal and neonatal nutritional vitamin D status." A Finnish study [Ala-Houhala 1986] showed that supplementing the mother with 50 µg (2000 IU) vitamin D per day was as effective for maintaining baby's vitamin D levels as supplementing the baby with 10 µg (400 IU) per day. However, some feel that higher levels of maternal supplementation (greater than the "safe" level of 2000 IU) would be needed to maintain adequate infant vitamin D levels. +
http://www.kellymom.com/nutrition/vitamins/vitamin-d.html