Nonetheless, most prenatal supplements contain only 400–1,000 IU of this vitamin per dose.įullWell Prenatal is a prenatal vitamin created by registered dietitians that delivers 4,000 IU of vitamin D per dose, along with other nutrients that are important during pregnant and breastfeeding. Some studies indicate that a daily dose of 6,400 IU promotes optimal vitamin D levels in both breastfeeding women and breastfed infants, though it’s best to consult a healthcare professional for a personalized recommendation ( 17). Those who are breastfeeding may need even more. In fact, experts suggest that to maintain high enough blood levels of this nutrient, which may help protect against pregnancy-related complications, pregnant women should take up to 4,000 IU of D3 per day ( 15, 16). It’s recommended that pregnant women supplement with 600 IU of vitamin D3 per day, though some research suggests that higher doses may support better maternal and infant outcomes ( 14).
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