In infants and children up to 1 year old, at least 400 IU/day to maximize bone health
In children and adolescents aged 1-18 years, at least 600 IU/day to maximize bone health
In adults aged 19-70 years, at least 600 IU/day to maximize bone health and muscle function
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Cite this: Romesh Khardori. Fast Five Quiz: Vitamin D - Medscape - Jul 21, 2020.