Displaying 10 results of Cholecalciferol Stable Isotopes Cholecalciferol stable isotopes are isotopic forms of vitamin D3 that have the same number of protons but a different number of neutrons in their atomic nucleus. These isotopes are useful tools for medical and scientific research, as they can be used to track the absorption, distribution, metabolism, and excretion of vitamin D3 in the body. Cholecalciferol stable isotopes can also be used to study bone health, calcium metabolism, and the role of vitamin D in various diseases, such as osteoporosis, cancer, and autoimmune disorders.