"Caffeinated" refers to the presence of caffeine, a natural stimulant found in various plants. Caffeine is commonly consumed in beverages like coffee, tea, and energy drinks, and it works by blocking adenosine receptors in the brain, which helps to reduce feelings of fatigue and increase alertness. Many people enjoy caffeinated drinks for their ability to enhance focus and improve mood. However, excessive consumption can lead to side effects such as insomnia, jitteriness, and increased heart rate. It's important to consume caffeine in moderation to enjoy its benefits while minimizing potential drawbacks.