Chlorophyll is a green pigment found in plants, algae, and cyanobacteria, essential for photosynthesis. It absorbs light most efficiently in the blue-violet and red parts of the electromagnetic spectrum, reflecting green light, which gives plants their characteristic color. Chlorophyll plays a crucial role in converting solar energy into chemical energy, facilitating the synthesis of glucose from carbon dioxide and water. It is also used in food coloring and has potential health benefits due to its antioxidant properties. Natural sources include spinach, kale, and other leafy greens.