In order to obtain the designation of Certified Holistic Cancer Practitioner, one must already be a health care practitioner, such as a Registered Nutritionist, Dietitian, Registered Nurse, or Medical Doctor. A CHCP is trained in cancer development and its possible links to diet, lifestyle, and environment, as well as in current medical and natural treatments and preventive strategies. The mission of a CHCP is to make a difference in clients diagnosed with cancer.