Biomerica of Newport Beach, California is making the offer as part of National Cancer Awareness Month.
Colorectal cancer is the second leading cause of cancer-related deaths in the United States.
About 140,000 new cases will be reported nationwide this year, with about 56,000 Americans dying from it. The disease, cancer of the colon and rectum, often grows slowly. Symptoms can include rectal bleeding, blood in or on the stool, change in bowel habits, diarrhea, constipation or the feeling that the bowel does not empty completely. If caught early, medical experts say the cancer is 90 percent curable. Unfortunately, only 37 percent of all colorectal cancers are detected at an early stage.