
08/13/2023
VITAMIN D ☀️
Vitamin D is different from all other nutrients as it can synthesise itself in the body without any dietary requirements. However, in order for this to occur, sufficient exposure to direct sunlight is needed which can be difficult for many people.
When the sun's ultraviolet B rays (UVB) make contact with the skin, a precursor for vitamin D that is created from cholesterol converts to pre-vitamin D and is later converted to active vitamin D.
Even though vitamin D is not considered an essential nutrient (meaning it is not required from food sources as the body can create it itself), there are still foods that provide vitamin D, which is very useful if you struggle to get enough sunlight exposure. Vitamin D is found in both plant and animal-based foods such as fortified margarine spreads, fatty fish, eggs, beef, and fish oils.
Unfortunately, the sun that comes through the windows at your home or in the workplace won’t provide vitamin D as the glass used for windows blocks the UVB rays you need to produce vitamin D, sunscreen also has the same effect but remember in the summer very little time is needed in the sun to get enough vitamin D ⛅️
So for those people who work indoors or don’t get much time outside in the sun, supplementation may be recommended especially during the winter so it could be worth talking to a health professional about it.
[Harvard, 2023, NZ Nutrition Foundation 2022, Whitney et al., 2019]