August 28, 2021

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What Is Vitamin The D3 (Cholecalciferol) Supplement? Your Sun!

Why Vitamin D3?

Vitamin D3 is essential for the human body and performs many vital functions. Known chemically as Cholecalciferol, medical experts estimate about one billion people in the world are D3 deficient. This vitamin, in particular, can have an impact on as many as 2,000 genes in the body. If you work a lot inside and don’t get out as much as you’d like, you could very well be deficient.

Vitamin D despite its name, is not actually a vitamin, but a prohormone or precursor of a hormone. It is fat-soluble and promotes the absorption of calcium, regulates bone growth and plays a role in immune function. The body is able to produce it and it is essential for maintaining healthy bones and teeth.  Many food manufacturers add it to milk, margarine, and breakfast cereals.

To prevent deficiency symptoms, make sure to eat vitamin D-rich foods regularly or add supplements. Taking it along with calcium, especially with postmenopausal women has been found to have a 60% drop.


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 2 Kinds Of Vitamin D3 

Vitamin D2 (Ergocalciferol) comes from plant-sourced foods such as plants and mushrooms exposed to sunlight.
Vitamin D3 (Cholecalciferol) comes from animal-sourced foods such as oily fish, butter, dietary supplements, egg yolk, and liver.

Your body needs this supplement, especially if you are not getting outside, wearing sunblock too often, or eating a vegan diet, which causes malabsorption of vitamins. This number goes up even higher in Hispanics and African-Americans. Studying populations with varying degrees of skin pigmentation is important because the primary source of vitamin D is UV-B radiation from the sun, which produces provitamin D3, the initial vitamin D metabolite, in the skin.

Melanin pigmentation that makes skin darker in color also acts as a natural sunscreen by absorbing the UV-B from the sun. However, this protective quality also means that less UV-B radiation is available for the production of provitamin D3.

If you find yourself forgetting things, you may be dealing with a lack of this vitamin, causing disorders such as dementia and cognitive impairment, especially in older adults who tend to show a marked decrease in D3. Doctors can diagnose vitamin deficiency by performing a simple blood test.

Your doctor may order X-rays to check the strength of your bones. If you’re diagnosed with a deficiency, your doctor will likely recommend you take daily supplements. If severe, they may instead recommend high-dose vitamin D3 tablets, soft gels or liquids. You should also make sure to get it through sunlight and the foods you prepare and eat daily.

The Sunshine Vitamin

D3 is a natural form of Vitamin D but this vitamin, the human body makes from sunlight. When skin is exposed to sunlight, it is made in the body. Our body is designed to get what it needs when bare skin is exposed to the sunlight. The part of the sun’s rays that is important is ultraviolet B (UVB).

Generally, Vitamin D3 is not synthesized by our body i.e., the body cannot produce it. Large amounts of cholecalciferol are made in our skin when we expose all the body to summer sun. 

7 Common Risk Factors:

•Having dark skin

•Being elderly.

•Being overweight or obese.

•Not eating much fish or dairy.

•Living far from the equator where there is little sun year-round.

•Always using sunscreen when going out.

•Staying indoors

Because of all these factors – your skin type, where you live and the time of day or season – it can be difficult to work out how much time you need to spend exposing your skin to the sun in order to get the vitamin D you need. A good rule of thumb is to get half the sun exposure it takes for your skin to begin to burn to get your vitamin D and expose as much skin as possible.

The Symptoms


If you have depression, it could be due in part to low levels of vitamin D3. Doctors have discovered that depression and inadequate levels in the bloodstream are closely linked, especially in older adults. One study showed that youths who had depression also had a low level in their system.

Muscle Pain

Deficiency may cause muscle pain. One study of people with chronic muscle pain showed that 71 percent of them were deficient in this essential nutrient. This supplement can decrease pain in those dealing with chronic pain who just don’t have enough.


Those who have a low amount are at a greater risk of catching colds and developing infections because the vitamin is essential in helping to keep the immune system strong and capable of fighting off infections. If you’re getting sick all the time and you get infections frequently, you may want to ask a doctor about having your levels checked.


If you’re low in this vitamin you may feel tired all the time and fatigued even when you’re getting a good night’s sleep. You may feel like you don’t have the energy to keep up with everyday things. Vitamin D3 helps keep the body feeling energized because it works toward good health in so many ways including keeping the immune system healthy and enabling the body to heal naturally.


People who are overweight or obese may also have low levels because fat cells will often absorb vitamin D3 instead of letting the vitamin do their important work. Malabsorption may also cause obesity, so if you are overweight, it’s important to make sure that you have enough to contribute to your body’s health.

Back Pain And Bone Pain

D3 is an important vitamin that helps your body absorb calcium. Without it, your body is unable to use the calcium you ingest to maintain strong bones. Studies have shown that insufficient amounts can cause pain in the back, legs, bones, joints, and ribs. This may be due to gradual bone loss.

The Benefits

Vitamin D3

There are many major benefits of vitamin D3.

1. The most significant benefits to vitamin are its control of human mood swings and make it light and happy.

2. Helpful in insulin control because it manages blood sugar levels more effectively.

3. Required for lower blood pressure when blood pressure reaches extremely high in the body then D3 actively reduces the concentration of renin (an enzyme secreted by the kidney that has an effect on blood vessels).

4. Heart function can also be impacted by the presence of vitamin D3 of which there are many forms that control the health of the heart.

Maintaining Healthy Levels

It helps preserve youthful cognitive function and offers broad-spectrum benefits for bone and immune system health. Vitamin D3 also helps maintain blood pressure already within the normal range, supports healthy inflammatory response and endothelial function, and more.

Make sure you’re getting enough of this essential health supplement nutrient. Add it to your daily regimen today.

In health,


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16 thoughts on “What Is Vitamin The D3 (Cholecalciferol) Supplement? Your Sun!

  1. Wow,

    I didn’t realize that our natural difference in complexion would put us in the “at risk” category.

    I’ve always thought those of us with more pigment would be considered less of a risk.

    I love the sun so I think (I hope) I’ll be okay, but this is definitely some good information to pass along! Thanks so much for sharing!

    1. Hi Aria, sometimes with darker pigmentation there are greater risks in cetain areas and less risk in others. The main thing is getting the sunshine that your body needs. That’s especially hard for those in the winter months who live in colder climates. I’m glad you information on vitamin D3 helpful. Thank you for reading my article and please feel free to share.

  2. Hello,

    Thank you for the very informative article, living in Canada we don’t always get out in the sunshine as often as we should during the winter months. I myself dislike being cold, so I avoid being out longer than I need to be.
    I really didn’t know the differences in Vitamin D, you’re article has been extremely helpful in clearing that up for me. Now I know which Vitamin D I really need the most.

  3. This is an interesting article. D3 has became one of the most sought after supplements for many of the reasons mentioned. I would like to know some sources for the information given, risks and/or syptoms. As well as the benefits of taking it. Alot of good information here though. Thank you for your time in sharing..

    1. Hi Tim, thank you for for reading the health benefits of vitamin D3. D3 shouldn’t come with any risk unless you taking in a much higher dose than directed on the label of the brand you purchase. As for the benefits, they are many but I hope I covered enough to give you a perspective on how important vitamin d3 and it’s connection, as well as supplimentation if you are not getting enough sun.

  4. Hi,
    what an article with very informative information! I studied biology at university and I know the importance of this vitamin in the body but I didn’t know that it was possible to diagnose vitamin deficiency by performing a simple blood test.
    Thank you for sharing!!

  5. I have been paying a lot of attention to vitamin D3 of late. Living in a northern climate means my sun exposure can be limited during a significant part of the year. One big issue with me is maintaining a good blood pressure. D3 might be the answer. The more I read about D3, the more I realize it’s probably one of the most important vitamins to maintain at optimum levels.

    One of the subjects that often arise concerning D3 is optimum levels. I have been pushing my amounts higher lately. I could be wrong, but I feel our body can handle fairly high amounts. The bigger issue, however, is chronic low levels by a large segment of the population. Thanks for sharing!

  6. Thank you so much for this informative article. As I live near the equator with abundance of sunlight, Vitamin D is the least talked about supplement. As it is too hot and sunny outside, we tend to prefer to stay indoors where there is air-condition. I think many of us do not even know the importance of Vitamin D. I am especially surprised that a deficiency in Vitamin D can cause a person to be depressed! I think I might have to take Vitamin D as I am working indoor for almost the whole day.

    1. Hello Lynn, Wow you live near the equator? Yes, I’m sure you do get plenty of sunshine living there. I appreciate you reading my article but I do want to mention there is a difference between D and D3. They both are great supplements though. Thanks for visiting and taking time to leave a comment.

  7. Great post and a great reminder to get outside!

    I have been actively working on getting outside, between 10 am and 2 pm, daily for at least 20 minutes. It works wonders for my mental health. I do take supplements during the winter because I live in Canada and we do not get Vitamin D from the sun from October to around March.

    I have been encouraging my mom to take supplements and get outside as well. My mom just had a stroke recently and I am sure Vitamin D can help…if we remember to take it or get out in the sunshine.

    1. Irma, good for you! I’m sorry to hear about your mom and I hope she will be on the road to recovery soon. Yes those winter months can be pretty harsh, especially in Canada. Thanks for coming back to my website. Be well.

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