Marc W. Rosen, D.C. has many ways of evaluating the body to see what type of supplementation is needed. One of his methods is called Contact Reflex Analysis or CRA and is a form of muscle testing. Through this type of assessment, he can find out exactly where the body is lacking in nutrition and which products are best for that system. The nutritional products used are considered whole food supplements and actually feed the various organs and gland in the body to aid in strengthening function ability and repair. Marc W. Rosen, D.C. also uses the Eat Right for your Blood type program to help with dietary and supplementation recommendations.

Dr. Rosen has been extensively studying and using Fingernail and Tongue analysis that correspond with Chinese herbs to help with many nutritional weaknesses and strengthen systems of the body. He also recommends many homeopathic remedies that again support the core and constitution of the body.