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Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol.This is important for maintaining calcium levels and promoting bone health and development. [4]
The EFSA reviewed safe levels of intake in 2012, [167] setting the tolerable upper limit for adults at 100 μg/day (4000 IU), a similar conclusion as the IOM. The Swedish National Food Agency recommends a daily intake of 10 μg (400 IU) of vitamin D 3 for children and adults up to 75 years, and 20 μg (800 IU) for adults 75 and older. [175]
Vitamin D (the inactive version) is mainly from two forms: vitamin D 3 and vitamin D 2.Vitamin D 3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from D 3 supplements or fortified food sources.
In this comprehensive guide, we unveil the 30 best brain supplements meticulously chosen to help adults sharpen their cognitive faculties, improve memory and safeguard against age-related decline.
Previtamin D 3 is an intermediate in the production of cholecalciferol (vitamin D 3).. It is formed by the action of UV light, most specifically UVB light of wavelengths between 295 and 300 nm, acting on 7-dehydrocholesterol in the epidermal layers of the skin.
Vitamin K2 may have a protective effect on bone mineral density and reduced risk of hip, vertebral and non-vertebral fractures. [11] These effects appear to be accentuated when combined with vitamin D and in the setting of osteoporosis. [1] Research suggests that vitamin K 2 (Menaquinone 7, MK-7]) may reduce the rate and severity of night time ...