Official Guidelines

NHS (UK): (http://www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin-D.aspx)

Pregnant and breastfeeding women 400 IU/day (10 micrograms)
Infants (6 months to five years) 280-340 IU/day (7-8.5 micrograms)
People aged 65+ and those not exposed to much sunlight i.e. housebound 400 IU/day (10 micrograms)

NIH (US) : (http://ods.od.nih.gov/factsheets/VitaminD-QuickFacts/)

 

Life Stage Recommended Amount
Birth to 12 months 400 IU/day
Children 1-13 years 600 IU/day
Teens 14-18 years 600 IU/day
Adults 19-70 years 600 IU/day
Adults 71 + years 800 IU/day
Pregnant and breastfeeding women 600 IU/day

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