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Cells of the skin and circulation are in constant two-way communication. Following exposure of humans to sunlight or to phototherapy, there are alterations in the number, phenotype and function of circulating blood cells.
The dramatic rise in allergic disease has occurred in tandem with recent environmental changes and increasing indoor lifestyle culture. While multifactorial, one consistent allergy risk factor has been reduced sunlight exposure. However, vitamin D supplementation studies have been disappointing in preventing allergy, raising possible independent effects of ultraviolet (UV) light exposure.
Vitamin D deficiency (serum 25-hydroxyvitamin D (25(OH)D) concentration <50 nmol/l) is recognised as a public health problem globally. The present study details the prevalence and predictors of vitamin D deficiency in a nationally representative sample (n 3250) of Australian Aboriginal and Torres Strait Islander adults aged ≥18 years. We used data from the 2012-2013 Australian Aboriginal and Torres Strait Islander Health Survey (AATSIHS). Serum 25(OH)D concentrations were measured by liquid chromatography-tandem MS.
Early infancy oral vitamin D supplementation does not appear to reduce the development of early childhood allergic disease
When combined with physical activity, low-dose UVR may more effectively limit adiposity and modulate metabolic and immune pathways in iBAT
Evidence supports that higher sun exposure and/or vitamin D sufficiency in pregnancy, or supplementation in early life, decreases type 1 diabetes risk
Associations between Vitamin D-binding protein, serum Vitamin D, and the calculated free Vitamin D concentrations with the risk of Crohn's disease flare
The cardiometabolic protective effects of ultraviolet radiation and mechanistic pathways through which ultraviolet radiation could be beneficial.
Maintaining sufficient vitamin D is necessary for optimal lung health, and vitamin D may modulate the lung microbiome in a sex-specific fashion
Dietary vitamin D3 increased the suppressive activity of regulatory T cells in the skin-draining lymph nodes, which are poised to suppress dermal inflammation