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Vitamin D deficiency

Vitamin D is essential in maintaining normal serum calcium and promotion of bone mineralization. We recommend a serum 25 (OH) Vitamin D level of 75-100 nmol/l

Serum levels of 25 (OH) D above 75 nmol/l are rarely achieved through the diet alone.  Supplementation is required during the winter months and in summer if sunscreen is used

Who is at Risk

   Neonates

Exclusively breast fed infants who are not receiving a Vitamin D supplement

  Children and Adolescents in the summer

Those who use sunscreen

Those who do not use sunscreen but spend less than 10-15 minutes a day in direct sunlight.

Note; Sunscreen with a block of 8 or above, blocks all vitamin D production through the skin

  Children and Adolescents in winter

 All children and adolescents not taking supplementation.

  Children with chronic diseases

  Children with a chronic condition resulting in fat malabsorption i.e. cystic fibrosis, celiac disease and biliary atresia.

  Dietary Reference Intake (DRI)  

Age

Sex

Elemental Calcium

Vitamin D

1-3 years

Both

500mg

800 IU

4-8 years

Both

800mg

800 IU

9-13 years

Both

1300mg*

800 IU

14-16 years

Both

1300mg*

800 IU

17-18 years

Both

1200mg

800 IU

Young adult

Both

1000mg

800 IU

* Osteoporosis Society of Canada: 1200 - 1400 mg

 


Note: 
 
Patients often have a combined deficiency of both vitamin D and calcium
 
The vitamin D dose may have to be adjusted so as to obtain a serum 25 (OH) vitamin D level between 75-100 nmol/l