Determination of tracers within subjects

摘要: The present invention generally relates to the use of tracers, for example, track a substance that has been administered subject. A tracer may be separate from administered, or in some cases, and are chemically bonded each other. When subject (e.g., ingested), absorbed and/or metabolized by subject, pharmacokinetic activity within related substance. Thus, following tracer, determined. itself determined using any suitable method, depending on tracer. As an administering indicator able interact with For instance, applied skin give different visual appearance based concentration otherwise exhibit determinable change property indicator. Other aspects directed methods making promoting such kits involving like.