exposure from sunlight is linked to the production of the essential nutrient vitamin D in the body.
However, other factors including cloud, ozone and aerosols can also significantly reduce the levels of UVB
It was also found that excessive UVB
irradiation increased the production of reactive oxygen species, influenced the cell metabolic pathway, and decreased the activity of superoxide dismutase (3).
Jekler et al.7 reported that more than 60% of study cases improved considerably when UVB
was administered for 8 weeks.
, it is related to an increased risk of skin cancer but, unlike UVB
, it's not filtered by the ozone.
Did you know that the SPF rating on the product label refers to protection from UVB
The Skin Cancer Foundation says: "Both UVA and UVB
penetrate the atmosphere and play an important role in conditions such as premature skin aging, eye damage (including cataracts), and skin cancers.
It is a gauge of how well a sunblock protects you against UVB
. The SPF number gives you an indication of how long you may stay under the sun without getting burned.
Ultraviolet B (UVB
), covering a wavelength range of 290–320 nm, makes up only 1–10% of solar UV radiation.
The researchers found that carvedilol exhibited a protective effect in cultured mouse skin cells exposed to UVB
and in hairless mice given the drug after UVB
is the central culprit behind sunburn, while UVA rays, which enter the skin all the more deeply, are related with wrinkling, leathering, hanging, and other light-induced impacts of maturing.
Louis, MO, USA) and UVB
irradiated (290-320 nm) at a dose of 400 mJ/[cm.sup.2] using FS-20 Fluorescent lamp (Panasonic, Osaka, Japan).