Pre-vitamin D3 decanoate, a derivative of vitamin D3, can be transformed into the active form of vitamin D in the body. Initially, it is converted to 25-hydroxyvitamin D3 in the liver and then to 1,25-dihydroxyvitamin D3 in the kidneys. During preparation, vitamin D3 might react with triglycerides in the formulation, forming ester compounds that impact the stability and bioavailability of vitamin D3. This compound is utilized in the study of diseases related to vitamin D, including osteoporosis, autoimmune diseases, and certain cancers .