Is it possible under any type of medical examination(ex. Gastroscope ) to find out if someone has been on diet medicine? Why?

Yes, it is possible to determine if someone has been taking diet medicine through certain medical examinations, including blood tests and urine tests. Here's why:

1. Blood tests: Some diet medications, such as appetite suppressants or fat blockers, can affect various physiological markers in the body. Blood tests can detect changes in hormone levels, liver enzymes, or other substances that may indicate the use of diet drugs. However, it's important to note that not all diet medications may leave traces in the blood.

2. Urine tests: Certain diet medications can be detected in urine samples. Most drugs are metabolized by the body and eliminated through the urine. Urine tests can detect the presence of specific compounds or their metabolites, providing evidence of drug use. However, similar to blood testing, not all diet medications will show up in urine tests.

It is worth mentioning that medical professionals need to have a reasonable suspicion or specific reason to perform these tests. It is not a routine procedure in typical medical check-ups, and privacy and consent policies will likely apply.

If you suspect someone has been taking diet medicine, it is best to consult with a healthcare professional who can guide you and determine the most suitable course of action.