Why is it necessary to check your Vitamin D levels

Why is it necessary to check your Vitamin D levels

Vitamin D also called as the sunshine vitamin is produced in response to sunlight exposure in our body. Vitamin D is best absorbed from sunlight. Food sources include fortified foods, sardines, fish oils, eggs, cheese, beef and mushrooms (exposed to sun)


Some of the benefits of Vitamin D include:

  • Promotion of healthy bones and regulates calcium as well as phosphorus absorption
  • Protection against autoimmune diseases like Type 1 Diabetes
  • Promotion of immune and brain health
  • Is protective against cancer and cardiovascular diseases
  • Research also suggests Vitamin D can be possibly used to treat depression and mood disorders.


Deficiency of vitamin D mainly occurs due to inadequate diet, usage of creams/sunscreens that block UV rays exposure, dark complexion, clothes covering a major part of our skin, and renal or gastrointestinal disorders.

Deficiency of vitamin D can lead to osteoporosis (in adults), rickets (in children), increased risk of respiratory, cardiovascular, allergic disorders.


Figure 1. Summary of causes of vitamin D deficiency and diseases and disorders associated with vitamin D deficiency.

Is vitamin D protective against COVID-19?

According to a study conducted by William B. Grant, Vitamin D was found to reduce the risk of influenza and Covid-19 related infections and deaths. Another study conducted by D.M. McCartney and D.G. Byrne published in Irish Medical Journal indicates that vitamin D deficiency may contribute to increased risk of respiratory infections including Covid-19. Hence it is essential for the vulnerable populations especially older adults consume this vitamin.

The upper limit for Vitamin D according to health care experts is 4000 IU per day. Excess Vitamin D can lead to toxicity issues. Hence it is best to consume from natural sources.

Divya Lakshmi Pillai

I'm an avid reader and writer who enjoys writing poems, stories as well as writing blogging.

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