Vitamin D: Are you deficient and what to do about it?
Vitamin D (also called calcitriol) is a fat-soluble vitamin that is well known for its role in absorbing calcium from the small intestine, bone mineralisation, and for regulating calcium and phosphorous levels in the blood and bones. Calcium and phosphorous are critical for building and maintaining healthy bones, but vitamin D has many other roles in the body. These include immune system function, reducing respiratory illness, and potential protection against diabetes, hypertension, dementia, and even certain cancers. Vitamin D has many other potential health optimisation considerations in which research is still developing. Where do we get it? 80 to 100%…