High prevalence of vitamin D deficiency in a sun-rich country like India (Latitude—8° 4′–37° 6′ N most of India has adequate Ultraviolet B radiation (UVB) throughout the year) has been reported due to several reasons including inadequate exposure to sunlight, dietary factors (inadequate...
Environmental factors that influence the cutaneous production of vitamin D. All vertebrates, including humans, obtain most of their daily vitamin D requirement from casual exposure to sunlight. During exposure to sunlight, the sola... MF Holick - 《American Journal of Clinical Nutrition》 被引量: ...
Vitamin D is a fat-soluble vitamin found in certain foods, added to others as a fortification, and available as a dietary supplement. It is also produced endogenously when sunlight's ultraviolet (UV) rays trigger vitamin D synthesis when it falls on the skin. Vitamin D is also known as ca...
The ideal way to get vitamin D is by exposing your skin to appropriate sunlight. Unfortunately for most of us there simply isn’t enough sun exposure for nearly half of the year. However, even in the sun many of us are modern day cavemen and we spend the majority of the time the sun...
Humans obtain vitamin D from either sunlight exposure or dietary foods and supplements. There are two forms of vitamin D: vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol). Vitamin D3 is synthesized endogenously in the skin and found naturally in oily fish and cod liver oil. ...
Vitamin D deficiency and vitamin D receptor (VDR) gene polymorphism, FokI, is reported to increase the risk of many cancers. Role of vitamin D and its receptor polymorphisms in ovarian cancer has not been clearly defined. To study the levels of serum vit
showed the same results. Other research in south India shows thatexposure to sunlight between the hours of 11 a.m. and 2 p.m. will promote vitamin D production in the skin year round. In the tropics, that equates to a latitude 13.40° N and longitude 77.2° E, from May 2007 to ...
Vitamin D was first known as the substance that prevented rickets. Although doctors in the 19th century knew that lack of sunlight was a risk factor for rickets, research did not identify vitamin D as the compound that prevented rickets until the early 20th century [30]. Vitamin D prevents ...
Vitamin D can be produced in the skin as a result of exposure to sunlight. Vitamin D is the precursor to the active form of 1,25-dihydroxyvitamin D and is found in two forms. Vitamin D2 (ergocalciferol) is formed by UV-B irradiation of plants, fungi, and yeast containing the steroid...
vitamin D deficiency because:―Many people’s sun exposure is reduced for various reasons, including the use ofsunscreen.―Many people don’t consume enough vitamin D from diet and supplements.Sources and Types of Vitamin DSources of Vitamin DVitamin D comes from:―Exposure to sunlight.―Diet....