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Vitamin D status and ill health

This paper is a comment in response to a review of Vitamin D status and its association with ill health.

Environmental, personal, and genetic determinants of response to vitamin D supplementation in older adults

We aimed to examine genetic and nongenetic determinants of change in serum 25-hydroxyvitamin D (25(OH)D) after supplementation.

What is the optimal level of vitamin D?: Separating the evidence from the rhetoric

New evidence indicates that both high and low 25(OH)D levels may be associated with increased health risks.

Vitamin D deficiency causes airway hyperresponsiveness and increases airway smooth muscle mass in the lungs of female BALB/c mice

We tested whether there is a causal association between vitamin D deficiency, airway smooth muscle (ASM) mass, and the development of airway hyperresponsiveness

Vitamin D C3-epimer levels are proportionally higher with oral vitamin D supplementation compared to ultraviolet irradiation of skin in mice but not humans

The proportion of 25(OH)D3 that undergoes epimerization is greater with oral vitamin D3 supplementation than exposure to UVR in mice, but not in humans

Ultraviolet irradiation of skin alters the faecal microbiome independently of vitamin D in mice

Skin exposure to ultraviolet radiation alters the faecal microbiome, and further investigations to explore the implications of this in health and disease are warranted

Cellular and molecular mechanisms of vitamin D in food allergy

Epidemiological evidence from the past decade suggests a role of vitamin D in food allergy pathogenesis

Vitamin D is crucial for maternal care and offspring social behaviour in rats

These data highlight that early life levels of vitamin D are an important consideration for maternal behavioural adaptations as well as offspring neuropsychiatry

Molecular actions of Vitamin D in reproductive cell biology

The aim of this work is to review current metabolic and molecular aspects of the VitD-VitD receptor axis in reproductive medicine

Prevalence and predictors of vitamin D deficiency in a nationally representative sample of Australian adolescents and young adults

Vitamin D deficiency is a public health concern worldwide. Maintaining vitamin D sufficiency during growth periods is essential. We aimed to determine the prevalence and predictors of vitamin D deficiency in Australian adolescents and young adults.