This document provides an overview of carbohydrates and lactose intolerance. It defines carbohydrates and describes the different types including sugars, starches, and fiber. It discusses the roles of carbohydrates in the body including energy supply, sparing protein, and glycogen storage. Symptoms, causes, and tests for diagnosing lactose intolerance are summarized. Management strategies like avoiding dairy and using alternative milks are also covered at a high level.