The sense of smell is important not only because of its effect on food but because it provides environmental cues, such as detecting smoke or avoiding spoiled or decaying food. The complete loss of smell is called anosomia. Recently, the Food and Drug Administration recommended that consumers stop using a product called Zicam, a nasal spray containing zinc. The FDA found that zinc could damage receptors in the nose, reducing or eliminating the ability to smell, report Norbert Herzog and David Niesel of UTMB’s Medical Discovery News.