The deodorizing effect of chlorophyll was discovered as early as World War II. At that time, patients with certain diseases immediately disappeared after using chlorophyll. Chlorophyll has a good deodorizing effect on foot odor, underarm odor, and bad breath caused by diet, smoking or abnormal metabolism. Chlorophyll can also eliminate bad breath in the human body due to alcohol intake, but it cannot reduce the alcohol concentration in the breath and blood. Some people think that the deodorizing effect of chlorophyll is partly the result of its inhibition of the production of sulfide during the metabolism of the body.