YKS 2019 · Soru 63

Caffeine is a bitter substance found in the beans, leaves, and fruits of plants, where it acts as a natural pesticide. It is found in a wide variety of products, including coffee, tea, soft drinks, candy, and desserts. Caffeine acts as a mood enhancer and provides energy. ---- When heavy coffee drinkers reduce their caffeine intake, for example, they often report being irritable, restless, and drowsy, as well as experiencing strong headaches, and these symptoms may last up to a week.