Various biological samples can be used for toxicology screening:
1. Urine: The most common sample type, especially for drug testing, due to its ease of collection and the long detection window for many substances. 2. Blood: Provides a snapshot of current levels of toxins or drugs but is more invasive to collect. 3. Saliva: Less invasive and provides quick results, useful for detecting recent substance use. 4. Hair: Can provide a long-term history of substance exposure but is less commonly used due to complexity in analysis. 5. Breath: Commonly used for alcohol testing, providing immediate results.
