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Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.
The history of light therapy can be traced back to ancient Egypt and India, where therapy with natural sunlight was first used to treat leucoderma. [3] In the 1850s, Florence Nightingale's advocacy of exposure to clean air and sunlight for health restoration also contributed to the initial development of light therapy for treatments. [4]
[41] [42] Although light therapy is the leading treatment for seasonal affective disorder, prolonged direct sunlight or artificial lights that don't block the ultraviolet range should be avoided, due to the threat of skin cancer. [43] The evidence base for light therapy as a preventive treatment for seasonal affective disorder is limited. [44]
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Cholecalciferol, also known as vitamin D 3 or colecalciferol, is a type of vitamin D that is produced by the skin when exposed to UVB light; it is found in certain foods and can be taken as a dietary supplement.
What is vitamin D good for? Vitamin D is essential for the bones and teeth, the immune system, brain health, and for regulating inflammation. The body produces vitamin D as a response to sun exposure.
Sunlight contains a small amount of light in the 290-300 nanometer range, which is essential for vitamin D synthesis. This is why 15 to 30 minutes of daily sun exposure is usually recommended. In Northern European countries, especially during winter when sunlight is limited, pregnant women may receive UVB light therapy in clinics to ensure ...
In addition to vitamin D, cow’s milk is also rich in calcium and vitamin B12, both of which are essential for numerous body functions including supporting bone health and energy production ...
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