Considering a hair follicle drug test? Learn about how long drugs can be detected in the hair, which drugs can be identified, and how hair testing works.
At-home colorectal cancer tests use a stool sample to detect cancer early. Learn about the types of at-home colorectal cancer tests and their pros and cons.
The stool DNA test checks for genetic changes in the cells in your stool. Abnormal cells or blood in the stool may be a sign of precancerous growths or cancer.