Immunotherapy is the use of medicines to help a person’s own immune system better recognize and destroy cancer cells. Immunotherapy can be used to treat some people with advanced colorectal cancer. Integrative medicine, which is a combination of medical treatments for cancer and complementary therapies to cope with the symptoms and side effects, is increasingly offered at premiere cancer centers around the world, including Mayo Clinic.

When considering complementary or alternative treatments, be open-minded yet skeptical and do your research. Learn about the potential benefits and risks. Here is an article from Mayo Clinic that might interest you about evaluating claims made by the producers and/or sellers of supplements, natural products and other alternative medicines. http://mayocl.in/2tGC0Jp

Here is just one article examining the claims made by Chris Wark:
- From Science Base Medicine https://sciencebasedmedicine.org/chris-beat-cancer-a-comprehensive-guide-to-making-a-killing/

"There’s no scientific evidence that proves or disproves that coffee enemas are helpful to treat any medical condition. Evidence for or against the use of coffee enemas is mostly anecdotal. In mainstream medicine, colon cleansing is considered unnecessary because your body’s digestive system is capable of getting rid of waste, toxins, and bacteria on its own."
https://www.healthline.com/health/coffee-enema