the green coloring matter of plants sunlight causes it to change carbon dioxide and water into the carbohydrates that are the food of the plant.the green-colored substance in the leaves and stems of plants, which in the early 1950s was thought to handlebody odors. More than ninety products containing chlorophyllSincluding toothpaste, gum, cough drops, deodorant and even dog foodSwere on the market in 1952. The craze ended when the Journal of the American Medical Association pointed out that grazing goats virtually live on chlorophyll and smell bad just the same.