The human intestinal circadian rhythm influences gut movement, nutrient absorption, metabolism, and cell regeneration. Abnormal sleep-wake cycles and disruption of zeitgebers aggravate the circadian rhythm and make intestinal cells more vulnerable to injury. Chronic circadian rhythm disruption is linked to gastrointestinal diseases such as IBS and colorectal cancer.

Dr. Laura M. Brown, is a registered naturopathic doctor with a functional medicine approach. She recognizes patterns, removes obstacles and stimulates the body's natural mechanisms to repair damage and rebuild health. She is owner of SOUTHEND Natural Medicine, a bestselling author of Beyond Digestion.