Answer: chlorophyll

AnswerCrossword Clue
CHLOROPHYLLPhotosynthetic pigment
CHLOROPHYLLIt's all the rage in drugstores.
CHLOROPHYLLGreen coloring matter of plants.
chlorophyllA green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring
chlorophyllthe green colouring in plants concerned with the production of sugars also CHLOROPHYL