Vitamin D3 and Immunity

Published : Jan 23, 2021
  • 0 mins read
  • Updated On : Jul 20, 2022

    How does Vitamin D3 support your immune system?

    Vitamin D3 support your immune system - Fast&Up

    While we all knew the importance of Vitamin D3 for positive effects on Calcium and Bone homeostasis. Vitamin D plays a key role in more than 3000 gene expressions in the body. It is arguably one of the most important minerals when it comes to daily immunity and general well - being. It helps to regulate health of skin, bones, strength and immunity.

    Despite the importance of Vitamin D, its deficiency is prevalent and one of the major health problems in developing and developed countries.

    In India, despite ample sunlight available throughout the year, Vitamin D deficiency is still prevalent and documented to be present among 50-90% of the population among all age groups.

    What is Vitamin D?

    Before we jump to its importance and other aspects, let's understand what Vitamin D is.

    Vitamin D is a fat soluble Vitamin that means it travels into your bloodstream and gets stored in your tissues. Vitamin D is the only Vitamin that your body is able to produce on its own, which happens with exposure of cholesterol in your skin to sunlight.

    From there, chemical reactions start in the liver that allows its absorption in blood, which is finally directed through tissues and into kidneys. And finally it turns into activated Vitamin D.

    What is the role of Vitamin D in Immune System?

    Vitamin D plays vital roles in optimal functioning of the immune system, research suggests that Vitamin D deficiency results in higher recurrence of infections, colds, flu and upper and lower respiratory tract infections.

    There are two major types of Immune systems both of which helps us in fighting infections.

    Innate Immunity: It is a nonspecific defense mechanism that acts quicker when an antigen attacks our body. The mechanism include physical barriers such as skin, chemicals in the body and immune cells that attack the harmful pathogens in the body

    Adaptive Immunity: This immunity occurs after exposure to an antigen either from pathogens or vaccinations. Adaptive immunity is activated if the innate immune system is unable to control the infection.

    Vitamin D plays a vital role in modulating cells of both immune systems which explains why this hormone is now considered such an important hormone when it comes to immunity. It also plays a role in autoimmunity. Vitamin D deficiency is quite prevalent in patients with autoimmune disease.

    How Vitamin D affects Respiratory Health?

    The process begins with activation of White Blood Cells that are a part of Innate and Adaptive Immunity. WBCs are located throughout the body including upper and lower respiratory tract. Once these cells are activated they are able to fight off viruses, bacteria, fungi and other harmful pathogens that may lead to such aforementioned health conditions.

    How to get enough Vitamin D?

    The only way to know the Vitamin D levels in the body is through getting it tested from your doctor. Although a thorough look at the lifestyle helps us get a fair idea if you are deficient in Vitamin D or not. Understanding the levels of Vitamin D helps us devise a plan to normalize the Vitamin D levels in the body.


    It is the most natural way to enhance your Vitamin D levels in the body. However there are various factors that impact the absorption in the body. Winter, cold climates and busy workday result in limited exposure to sunlight. Even in the summer months, SPF greater than 8 blocks blocks the ability of the skin to absorb Vitamin D3

    Food Sources

    There are some foods that help provide Vitamin D, but that is not enough to fulfil daily requirements of the same. 

    Food sources:

    • Cod Liver Oil
    • Eggs
    • Mushrooms
    • Dairy Products


    There are various supplements that help us fulfil daily requirements of Vitamin D. It should be noted that very few provide the same in its natural form. Vitamin D2 and Vitamin D3 are two forms of Vitamin D. Vitamin D3 is a natural form and is absorbed by the body easily.

    Fast&Up Charge Plus Advanced Ayurvedic Supplements

    Fast&Up Charge Plus designed with Ayush recommended herbs for advanced immunity and protection is formulated with clinically proven ingredients such as Natural Amla Extract with goodness of Giloy with power of super herbs Vitamin D3 and Elemental Zinc. Formulated with Swiss effervescent technology Charge Plus helps provide higher bioavailability and faster nutrient absorption as compared to traditional supplements.

    Bottom Line

    Vitamin D3 plays a critical role in maintaining overall health including immunity, skin, bone and mood. With clear studies suggesting a direct link between Vitamin D and Immunity, there is a clear link between Vitamin D and developing infections - protection against harmful pathogens and respiratory infections.

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