vitamin d may be synthesized as a result of sunlight exposure.
vitamin d may be synthesized as a result of sunlight exposure.
this vitamin may be synthesized as a result of sunlight exposure?
vitamin d
uvb radiation with a wavelength of 290–315 nanometers penetrates uncovered skin and converts cutaneous 7-dehydrocholesterol to previtamin d, which in turn becomes vitamin d. uvb radiation does not penetrate glass, so exposure to sunshine indoors through a window does not produce vitamin d. time of day, time of year, geographic latitude, ground altitude, cloud cover, smog, skin melanin content, and sunscreen are among the factors that greatly affect uv intensity and vitamin d synthesis, making it difficult to provide general guidelines. it has been suggested by some researchers, for example, that adequate amounts of vitamin d can be produced with moderate sun exposure to the face, arms and legs, averaging 5–30 minutes twice per week without sunscreen. (the darker the complexion, or the weaker the sunlight, the more minutes of exposure are needed, approximating 25% of the time for minimal sunburn. vitamin d overdose is impossible from uv exposure; the skin reaches an equilibrium where the vitamin degrades as fast as it is created.) individuals with limited sun exposure need to include good sources of vitamin d in their diet or take a supplement.
health effects of sunlight exposure
health effects of sunlight exposure
health effects of sunlight exposure