A false positive or false negative can be devastating to the child-parent relationship, not to mention the safety of the child. Take a moment to look over the chart below before deciding which type of test is best for your situation. If you have any questions, contact us . Hair Says can detect drug usage for up to 90 days, although that is disputed by scientists. Doesn't detect casual pot use, only chronic use.
Results vary depending on hair color.
It takes about 7 days for hair to grow from scalp, to detect drug use. FDA approved for general use. Scientific studies question reliability of MOST rapid tests.