Vitamin D has multiple roles in the body, helping to:
- Maintain the health of bones and teeth.
- Support the health of the immune system, brain, and nervous system.
- Regulate insulin levels and aid diabetes management.
- Support lung function and cardiovascular health.
- Influence the expression of genes involved in cancer development.
Despite the name, vitamin D is considered a pro-hormone and not actually a vitamin. Vitamins are nutrients that cannot be created by the body and therefore must be taken in through our diet. However, vitamin D can be synthesized by our body when sunlight hits our skin. It is estimated that sensible sun exposure on bare skin for 5-10 minutes 2-3 times per week allows most people to produce sufficient vitamin D, but vitamin D breaks down quite quickly, meaning that stores can run low, especially in winter.
Recent studies have suggested that a substantial percentage of the global population is vitamin D deficient.