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Blood levels of folate, a nutrient vital for fetal development, can be degraded by UV radiation, [57] raising concerns about sun exposure for pregnant women. [58] Lifespan and fertility can be adversely affected for individuals born during peaks of the 11-year solar cycle , possibly because of UV-related folate deficiency during gestation.
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun.Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness.
The Sun's UV output is divided into UV-A and UV-B: solar UV-A flux is 100 times that of UV-B, but the erythema response is 1,000 times higher for UV-B. [citation needed] This exposure can increase at higher altitudes and when reflected by snow, ice, or sand. The UV-B flux is 2–4 times greater during the middle 4–6 hours of the day, and is ...
The new anti-sunscreen movement makes several false claims about the association between sun exposure, sunscreen use, and cancer. Both Mineral-based and chemical-based sunscreens are safe, and ...
Under some conditions, children and young adults can see ultraviolet down to wavelengths around 310 nm. [7] [8] Near-UV radiation is visible to insects, some mammals, and some birds. Birds have a fourth color receptor for ultraviolet rays; this, coupled with eye structures that transmit more UV gives smaller birds "true" UV vision. [9] [10]
Ferritin is a biomarker that reflects iron stores in the body. Testing ferritin levels on a blood panel is one of the diagnostic thresholds of diagnosing iron deficiency, says von Drygalski. The ...
Artificial UV light sources from tanning units and phototherapy treatment units can also trigger PLE. About three-quarters of patients acquire PLE after UV-A exposure only, one-tenth after UV-B exposure only, and the rest after a combination of UV-A and UV-B exposure. [6] People vary in the amount of sun exposure needed to trigger the rash. [15]
Typically, dementia is associated with classic symptoms like confusion and memory loss. But new research finds that there could be a less obvious risk factor out there: your cholesterol levels.