An open-label trial of L-glucose as a colon-cleansing agent before colonoscopy.

Background: The high volume and poor palatability of standard colon cleansers remain obstacles to colonoscopy for many patients. Significant electrolyte disturbances and fluid balance alterations may occur with available agents. L-glucose, the stereoisomer of D-glucose, has laxative effects that make it potentially useful as a colon-cleansing agent.