Vitamin D for Babies: Dosing and Deficiency Signs
Medically reviewed by Dr. Ahmad Raza, MD (Pediatrics) — ChildBloom Medical Review Panel. Last updated: September 27, 2026. Written by Dr. Emily Chen, MD (Pediatrics) and the ChildBloom Pediatric Panel. All breastfed babies need 400 IU of vitamin D a day — breast milk carries less than 50 IU per liter, and sunlight is not…

















