How does drug screening work?
Not Medical Advice:
Once the body takes in a substance, the end product looks different after it passes through the body, which results in a metabolite. A urinalysis is designed to find specific types of metabolites that could only occur as a result of drug taking.
There are five main ways to drug test an individual: urine, hair, blood, saliva, and sweat. Testing the urine is the most common method and is the least expensive. Drug testing is extremely accurate and reliable when the testing process is done properly.
The International Olympic Committee took almost 6,000 urine and blood samples in an effort to fight doping, which resulted in the cleanest Olympics to date!