A billion people worldwide are deficient in Vitamin D(1).  That’s a lot of people missing out on sunshine.  With the cooler weather now approaching this is a good time to ask yourself if you’re getting enough Vitamin D for optimum health.

What is Vitamin D?

Vitamin D, the ‘sunshine vitamin’ is made in the body when UVB sunlight hits your skin, which triggers Vitamin D synthesis. You can get some vitamin D through your diet by including liver, grass-fed butter, eggs, and oily fish. However the best source of vitamin D comes from sun exposure.  

With the arrival of autumn in our northern climes, we begin to lose the high noon elevation of the summertime sun. When the sun is low in the sky, the sunlight travels across a longer slanting path through the earth’s atmosphere, which attenuates the levels of UVB radiation reaching your skin(2). This makes it difficult for you to produce sufficient Vitamin D between the months of October and March(3).

How Vitamin D synthesis occurs

Vitamin D is an oil soluble steroid hormone that forms when your skin is exposed to UVB radiation from the sun. When UVB strikes the surface of your skin, your skin converts a cholesterol derivative into vitamin D3. It takes up to 48 hours for vitamin D3 to be absorbed into your bloodstream to elevate your vitamin D levels, so it is important not to wash those valuable oils off your skin with an all over soap wash(4).

Why do I need Vitamin D?

Maintaining good levels of Vitamin D in the body is important to both our physical and mental health(5). There are Vitamin D receptor proteins in almost every cell in the body - it can help with with mood, sleep, energy levels and immune system functioning (because it inhibits inflammatory cytokines which cause inflammation(6)).

Vitamin D regulates the function of more than 200 genes, and a Vit D deficiency increases your risk factors for heart disease, stroke, autoimmune diseases and seventeen different types of cancer(7).

Vitamin D3 supplementation

If you are in the UK or Northern Europe, Vitamin D3 is recommended between October and March. Vitamin D3 supplementation is something that the NHS advocates along with most functional practitioners. Many multi-vitamins and over the counter products have low levels of synthetic Vitamin D and simply don’t have enough IU’s (International Units) of Vitamin D for optimum health. Some functional practitioners recommend taking 5,000 IU’s per day, and it is essential to take it along with healthy fats to aid absorption.

Rosita Extra Virgin Cod Liver Oil (EVCLO) is a great natural source of Vitamin D, it contains the cholecalciferol (D3) form which is highly bioavailable. Another option is Natural Stacks Vitamin D3 which like nearly all supplemental Vitamin D is derived from lanolin (a sheep’s wool oil). This may be particularly beneficial for people who are very deficient in Vitamin D as it contains 5,000 IU’s of cholecalciferol Vitamin D as well as 100mg of Organic Coconut Oil for convenience and assimilation. Bulletproof Vitamins A-D-K is also an option and useful for people who want the convenience of taking three fat-soluble vitamins in 1 softgel.

Test your levels

We have Vit D3 test kit which is a finger prick test you can do at home and post direct to the lab. As lab tests go, this is one of the cheapest. The Vitamin D Council has some useful resources which can be used to review your Vit D serum levels once you receive your results, or your functional practitioner or health coach can assist with the next steps to ensure your Vit D levels are optimum all year round.   

References