Introduction Vitamin D is an essential fat-soluble vitamin that plays a critical role in maintaining bone health, immune function, and cardiovascular regulation. Among its measurable forms in the human body, 25-hydroxyvitamin D [25(OH)D] is considered the most reliable indicator of overall vitamin […]
Introduction Vitamin D, a fat-soluble secosteroid, is one of the most crucial micronutrients for maintaining overall human health. It plays a vital role in regulating calcium and phosphorus metabolism, supporting bone mineralization, immune function, and various cellular processes. Despite being termed a […]