![]() ![]() Some meta-analyses make the assumption that vitamin D is a pharmacological agent, and not as a nutrient. Despite these trials, studies (including meta-analyses) have provided inconsistent conclusions. Vitamin D clinical trials have increased over the past decade. About 50–90% of vitamin D is absorbed through the skin via sunlight, whilst the rest comes from the diet. Vitamin D deficiency arises from multiple causes including inadequate dietary intake and inadequate exposure to sunlight. ![]() About 1 billion people in the world have vitamin D deficiency, ranging from children (leading most notably to rickets), pregnant and lactating women, certain racial groups, post-menopausal women and the elderly (leading to osteoporosis). Ī circulating level of 25-hydroxyvitamin D greater than 30 ng/mL (50 nmol/L) is considered a healthy level of vitamin D to maintain. Vitamin D is a fat-soluble vitamin utilised by human beings for normal bone development maintenance by increasing the absorption of calcium, magnesium and phosphate as well as potential pleiotropic effects on the prevention of cancer, heart disease, autoimmune disease, type 2 diabetes and depression. ![]()
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