Professional FAQs: How much vitamin D do people need?
Answered by Dr. Mohan P. Abraham M.D., FAAFP (Family Physician) · 40 years of experience · USA Infants and children require 400 IU per day, adults require 400-600 IU per day with adequate amount of sun exposure. → See more questions and expert answers related to vitamin d deficiency. → Learn more about vitamin d deficiency: See the causes, symptoms, treatment options and more. Answered by Dr. Chandra Shekar Adelli