Displaying 9 results of Thiamine Stable Isotopes Thiamine stable isotopes are isotopes of the essential vitamin thiamine that do not undergo radioactive decay over time. These isotopes have the same number of protons and electrons as the naturally occurring thiamine, but differ in the number of neutrons. Thiamine stable isotopes are used in research to better understand the absorption, metabolism, and distribution of thiamine in the body, and to develop new diagnostic and therapeutic applications for thiamine deficiency and related disorders.