Hair follicle testing has the largest detection window. As you consume THC, the substance enters the blood vessels on the scalp and makes its way to the hair, where they are more difficult to remove.
Hair follicle tests can tell if a person has consumed THC in the last three months. However, hair follicle tests are controversial since they also don’t show how much THC is in the person’s system.
Moreover, they can’t tell you when the person has consumed THC. As a result, for example, a new employee may unfairly face problems for consuming THC months prior to being hired.
But if you need to take a hair follicle test, Tokin Rid’s shampoo has potent clarifying powers that can remove THC from the scalp and hair.