Does A Lack of Sun Affect The Immune System?

Our body works in synergy with the Suns UVB ultraviolet rays to produce vitamin D3

D3 The Sunshine Vitamin

The rays from the sun and your immune system work together to produce vitamin D3, which is produced in your skin by the synthesis of UVB radiation and cholesterol in your skin.

In this post, we take a closer look at how that happens and the benefits of ensuring your vitamin D3 levels are normal along with some of the benefits you can expect to receive.

Below I have highlighted the important bits for you, just in case your schedule is tight.

Click the link you want to start with or by all means, continue on.

There are two types of D Vitamins:

  • Vitamin D2: abundant in fruit and vegetables.
  • Vitamin D3: produced naturally with the help of the Sun or sourced from animals and dairy.

Being deficient in vitamin D3 can cause severe problems to your health, your development and overall well-being.

Most of Us Will Find That We Have Some Level of Vitamin D3 Deficiency

Correct amounts are regularly required to support, among other things, muscle function, bone and tooth development. It also enables your body to absorb calcium and phosphorus and has been linked to brain health.


Vitamin D3 is one of the vitamins we manufacture ourselves naturally; production begins when exposed to the sun.

The sun UVB rays interact with the lipids, otherwise known as cholesterol (fats) in the uppermost layer of your skin, to produce vitamin D3.

D3 is one of the essential vitamins your immune system needs to function effectively and efficiently.

However, there are significant drawbacks to getting the right amounts of vitamin D3 via the sunshine alone.

Does Skin Color Have An Impact On The Ability To Produce Vitamin D3 Using The Sun?

The biggest drawback to producing vitamin D3 with the help of the sun is skin tone.

Skin tone is usually darker in hotter climates because it contains a pigment called Melanin.

This pigment protects the skin from the damaging rays of the sun and gives skin its beautiful colour.

Melanin absorbs the sun’s ultraviolet rays that initiate vitamin D

Skin Color Makes No Difference on the Northern Side of the Hemisphere


synthesis and significantly inhibit the skins’ ability to produce the levels of vitamin D3 the body needs.

So even if you live in a country with wall to wall sunshine, it is still almost impossible for people with darker skin tones to produce sufficient daily amounts of vitamin D3 by the sun alone.

Skin colour bears no significance in countries that can go without sunshine for up to six months a year.

People who live in Northern Hemisphere, where in the winter the days become shorter and the nights longer, will also struggle to produce enough vitamin D3 naturally through sunlight alone.

Vitamin D2, on the other hand, is pretty easier to obtain from a wide variety of foods and dietary supplements.

Vitamin D3 comes from animals like oily fish, liver, egg yolks, butter and dietary supplements.

Make sure you include vitamin D3 rich food into your diet. However, this still may not be enough to ensure you are maintaining the correct levels.

Short days & long nights makes it almost impossible to produce any vitamin D3.

A Word Of Warning (sunscreen is a must)

Please be mindful that wearing sunscreen is a must in the sun.

You also need to be aware that sunscreen blocks both the ultraviolet A (UVA) rays and ultraviolet B (UVB) rays from the sun.

It is the UVB energy that provides the energy you (skin) need to make vitamin D3, UVB energy can burn the skin and cause cell damage that can lead to cancer.

UVA energy contributes to skin damage and also causes premature ageing. Sun protection needs to be worn at all times whilst out in the sun, no matter what your skin tone.

*Please note the information in this post is intended for the purpose of general information only and should not be used as a substitute for the individual expertise and judgment of healthcare professionals & that I may get a commission for purchases made through links in this post.

4 thoughts on “Does A Lack of Sun Affect The Immune System?

    1. Mitch says:

      Thanks for that Diane,

      You Just made my day ?

      I really hope you found something to take away with you, a little food for thought.

      Hope to see you again real soon your comments, advice or suggestions will always be welcome and very much appreciated.

      Stay Save, Stay Healthy, Stay Strong

      Mitch X:-).

  1. Sylvia Christiansen says:

    Hi Mitch, fascinating article. At the moment, we hear so much about Vitamin D, especially in the times of Covid 19. Our immune system needs to be strong. I live in the Netherlands, and even in some summers, we don’t have enough sun. Oily fish has a good amount of Vitamin D 3, but I wouldn’t like it to eat everyday fish. When I was a child, we have been punished with fish oil to build a strong spine. I hated it! But it is really a great supply if our oceans were not that polluted.
    Did you hear about Vitamin K2 be taken with Vitamin D3?

    1. Mitch says:

      Hi Sylvia ??‍♀️

      lol, yes I remember being given cod liver oil of a spoon…ugggg!!!?

      But its so important to make sure we get enough of the D’s, Vitamin D3 in particular.

      I already know I have a deficiency so I make sure I take a daily supplement, I also make sure I get my oils, Omega 3, 6 and 9 all in one handy capsule so much easier.?

      I hadn’t heard about the Vitamin K2 & D3 so I took a look, a great combination that work in synergy to improve bone development and cardio vascular health will take a further look at that so thanks.

      & Yes it is so very sad, my heart bleeds for our oceans and the amazing life that lives in it right now.

      Thanks for taking the time to join the discussion Sylvia, your comments and suggestions are encouraged and will always be appreciated.

      Hope to see you soon.

      Stay Save, Stay Healthy, Stay Strong.

      Mitch X;-).


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