That’s a great question. We recommend daily vitamin D supplementation during pregnancy/breastfeeding as opposed to bolus dosing. Research has shown that daily dosing of vitamin D is more efficient at raising and maintaining healthy vitamin D levels than weekly or monthly dosing.
Feel free to check out the study below for more information regarding how dose intervals can affect clinical outcomes:
Another study aimed to determine the ideal dosage of vitamin D to provide breastfeeding mothers adequate vitamin D in their milk. They found that 6,400 IU vitamin D per day supplied the mother’s milk with adequate vitamin D for her child solely through breast feeding.