Most professionals often perform random drug tests especially if it can affect their performance. In some cases, people who have had troubles with the law have to ensure to undergo drug testing as well. Regardless of the reason for it, drug testing is an important part of life. Other than the traditional ways of conducting the test, many new and more efficient ways are continuously coming up. Hair follicle test, for example, is a very effective yet less invasive way of testing for illicit drugs in the system.