Our bodies manufacture vitamin D when the sun’s ultraviolet B (UVB) rays interact with 7-dehydrocholesterol (7-DHC) present in the skin.
Finally, prolonged exposure to UVR is linked to skin cancer, immune system suppression, photoaging (sun-induced skin aging), cataracts, and other eye damage.
Does UVA or UVB produce vitamin D?
But it is UVB (the sun burning rays) — not UVA — which helps the skin make vitamin D, so you are increasing your risk of skin cancer without receiving any benefit!
What is difference between UVA and UVB?
UVA light, also known as long-wave light, accounts for about 95% of the UV light that reaches our skin. Although both UVA and UVB are bad for skin, UVA rays are more of a threat because a much larger percentage of them reach earth’s surface. UVA light has a wavelength of 320 nm to 400 nm.
Do UV lights give you vitamin D?
Made by Sperti, the fluorescent sunlamp produces high-intensity ultraviolet-B (UVB) rays that trigger vitamin D production in the skin. Regular fluorescent lamps are not of high enough intensity to be useful for this purpose. Other sunlamps don’t necessarily produce the UV spectrum that optimizes vitamin D production.
Which is more damaging UVA or UVB?
UVB ranges from 290 to 320 nm. With even shorter rays, most UVC is absorbed by the ozone layer and does not reach the earth. Both UVA and UVB, however, penetrate the atmosphere and play an important role in conditions such as premature skin aging, eye damage (including cataracts), and skin cancers.
Photo in the article by “ويكيبيديا”