Aspirin Stable Isotopes are non-radioactive forms of aspirin molecules that have a stable nucleus. These isotopes are used for research purposes in the field of biochemistry and pharmacology. They are useful in understanding the metabolism and pharmacokinetics of aspirin in the body. Aspirin stable isotopes are also used in drug development and quality control. They offer the advantage of being safe and non-toxic, making them ideal for use in human clinical trials.