Vitamin D

Vitamin D

What is vitamin D?1

Vitamin D is both a nutrient we eat and a molecule that our bodies produce in response to sunlight.1,2 The main role of vitamin D is to maintain calcium concentrations within the blood and support bone and muscle function.1 Other important roles of vitamin D include:1

  • Absorbing and retaining phosphorus
  • Reducing cancer growth
  • Helping control infection
  • Reducing inflammation

Many organs have vitamin D receptors which suggests that vitamin D plays a part of many bodily functions that have yet to be discovered.2

Recommended dietary intake of vitamin D1

Age groupVitamin D (μg/day)
1–3 years5
4–8 years5
9–13 years5
14–18 years5
19–50 years5
50–70 years10
>70 years15
Pregnancy5
Lactation5

Sources of vitamin D2

Sunlight

Fatty fish, seafood, mushroom, egg yolk

Vitamin D supplements, fortified milk and oral nutritional supplements

Signs and consequences of vitamin D deficiency2

  • In adults: Loss of bone density (osteoporosis), falls and fractures, muscle weakness and fatigue, slow wound healing.
  • In children: Bone fragility that in in extreme cases may cause rickets. Rickets is a rare disease that causes the bones to become soft and bend.

Food for Special Medical Purposes. Use only under medical supervision.

References: 1. National Health and Medical Research Council, Australian Government Department of Health Ageing, New Zealand Ministry of Health, Nutrient Reference Values for Australia and New Zealand. Canberra: National Health and Medical Research Council. (2006). 2. Harvard School of Public Health. The Nutrition Source – Zinc. Available at: https://www.hsph.harvard.edu/nutritionsource/zinc/. Accessed: September 2023.

ANZ.2023.42467.ALL -AND -PND.1 (v1.1)