Click on the WU weather sticker for your city for detailed data.
Checkout the real-time data for the Ultra Violet Index (UVI) (on the weather page links given here) that will help you optimize your sunlight exposure for maximizing vitamin D generation in your body for improved health.
Learn more about the UVI on the right column of this page.
(Click on the weather page links to get the UV Index reading--at night the reading will be zero)
To see the UV Index in New Delhi click on the image below
For Safe Sun Exposure:
Click on video below to learn all about the UV Index and how you can maximize your health benefits from the sun by having a good and safe exposure to the sun's rays.
Ultra Violet (UV) light from the sunshine that is healthy for people is measured by its wavelength in nanometres, or 'nm'.
Two types of UV concern us mainly--UV-A, and UV-B. The third type-- UV-C, is a short wavelength UV absorbed by the atmosphere and only available through man-made UV lamps. UV-C is germicidal in nature.
Long wavelength UV-A is available more, early in the day and late in the day. UVA causes premature skin aging.
Short wavelength UV-B is available around solar noon.
To get a greater clarification about how the Solar Meter 6.5 works (that we used to get the readings on the video on this page), we wrote to to the manufacturers-- Solartech Inc with a query in December:
Steve Mackin of Solartech Inc replied clarifying that the reading was erythemally weighted UV (skin response weighted UV).
"Scroll down further to read about the importance of the Sunshine Vitamin for you!"
Click on the New Delhi Weather sticker on the right to see the UV Index in real time.
Download the Sun Exposure chart below and save to your device as a PDF format for handy reference--
Vitamin D is actually a hormone produced naturally in the body on exposing the skin to the sun's rays when the UV Index is 3 or more. The naturally produced vitamin D is stored in the body, and the excess not needed is excreted.
Vitamin D taken through supplements is in circulation and does not get stored; it also interferes with the ability of the kidneys to process vitamin D1 to D3 (25-hydroxy-D)--the natural most usable form.
However, where people are not able to get adequate sunshine time, if housebound, in hospital and so on, supplementation may be used to bring the vitamin D levels to above the minimum--62.5 nmol/L (25 ng/mL) to 75 nmol/L (30 ng/mL).
The UVB radiation is the one that generates vitamin D3, and it does not penetrate glass panes. While exposing oneself to the sun through a glass window one may get a tan, but won't get vitamin D3 generation by that exposure.
(See the video above for more details)
Protection from excessive sun radiation is advisable as it can create skin DNA changes and promote skin cancer in those who may be predisposed to it because of lifestyle factors.
Using sunscreens, hats, clothing is recommended to protect from overexposure.
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The Eating Cure Seminar is coming up on Saturday April 23, 2015. Book your seat now- * Admit 2 for the price of 1 - See the reason why * Click on the image above or Click this link for more...
The Ultraviolet Index (UVI) is an international standard of measurement of the strength of the sun's UV radiation on the planet, allowing for atmospheric absorption by ozone layer and atmosphere.
The UVI is a prediction of UV strength at around 2 to 4 hours around the solar noon when sun is at its highest.
The UV Index is designed to give people information about how to protect themselves from harmful UV and how to benefit from it.
Scroll down the page for more information and the UVI exposure time for various skin types.
Click on these links below to go that weather page and see the UVIndex (at night there will be a zero reading).