Vitamin D plays a pivotal role in regulating calcium absorption, while also contributing to immune function and overall well-being. A daily intake of 15 g is recommended for those aged 1–70 years old by the National Institutes of Health. Aging is a complex, multifaceted process that entails a gradual decline in organ function and an elevated risk of age-related ailments and mortality. Factors such as nutrition and limited sunlight exposure may also elevate the risk of deficiency in elderly population