VD2-D3 is primarily utilized in the field of nutrition and healthcare as a supplement to support bone health and calcium absorption. It is often incorporated into dietary products aimed at preventing or managing conditions like osteoporosis and rickets. Additionally, it plays a role in immune system regulation, making it a component in formulations designed to enhance overall immunity. Its application extends to veterinary medicine, where it is used to improve bone density and health in animals. In skincare, it is sometimes included in products targeting skin repair and rejuvenation due to its role in cellular growth and differentiation.