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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

I live in New Delhi, India, and here during summers there is abundant sunshine, with angle of sun rays reaching upto 90 degrees for many hours daily and temperatures reaching upto 45-50 degrees Celsius. I want to confirm whether in such a situation, do we get Vitamin D or not? In India the general information given is that Vitamin D can be absorbed only in the morning from 9am to 10am, i.e. when the sunrays are not very strong and are at lesser angles. Online Information is available about non absorption of Vitamin D due to less angle of sun rays but there is no information about non absorption due to more sunshine or at larger angles of sun rays.

Ask the Vitamin D Council

Asked by  udbhav.saraf19320400 on May 5, 2016

Answers
  •  udbhav.saraf19320400 on

    See title

    Answered by  udbhav.saraf19320400 on

  • IAW
    Participant
     IAW on

    “The closer to midday you expose your skin, the better this angle and the more vitamin D is produced.” “A good rule of thumb is if your shadow is longer than you are tall, you’re not making much vitamin D.” This is excellent to read http://www.vitamindcouncil.org/about-vitamin-d/how-do-i-get-the-vitamin-d-my-body-needs/. So you will make Vitamin D much faster at 90 degrees. As the degree lessons, you will have to spend more time in the sun to get the same benefits. In the above link you will learn that Vitamin D production depends on angle of the sun, skin color, time spent, and amount of skin exposed, arms and face are NOT enough.
    If they really promote 9am-10am, do you know what the angle of the sun is then? I’m curious.
    On one of our recent blogs was this http://www.vitamindcouncil.org/blog/new-research-finds-extremely-high-prevalence-of-vitamin-d-deficiency-among-pregnant-women-in-northern-india/. In the blog it states ”Despite the abundance of sun, research has found that India has a disproportionately high prevalence of vitamin D deficiency with an estimated 70% to 100% of the general population affected.” “Many Indian religious and cultural practices do not permit adequate sun exposure.” There have been many studies showing Vitamin D deficiency in India, even with your abundant sunshine. (Maybe it is because of the information you are receiving but really Vitamin D deficiency is a worldwide problem!)

    Answered by  IAW on
    •  udbhav.saraf19320400 on

      Thanks for the information, during summers the angle of sun rays at 9 am is around 45 degrees, i.e. one’s shadow will start to become shorter than their height. Here, doctors have been telling that only recently a study / research has proven that only morning sun rays give us Vitamin D as against the older notion that we can receive Vitamin D throughout a sunny day. This is what makes me curious to understand what information is true.

      Answered by  udbhav.saraf19320400 on