In a test group of 62 geriatric nursing home patients, the administration of chlorophyllin tablets was found to be helpful in controlling body and fecal odors. It aided also in easing chronic constipation, served at times as a useful and morale-building placebo, and assisted in abating excessive flatus. No toxic or other ill effects were observed. Bacteriologic studies failed to confirm reports in the literature of antibacterial properties for chlorophyllin. Further investigation of this possibility is recommended.