caffein

caffeine can help improve focus and concentration.

many people rely on caffeine to start their day.

too much caffeine can lead to anxiety and restlessness.

caffeine is commonly found in coffee and tea.

some people are more sensitive to caffeine than others.

caffeine withdrawal can cause headaches and fatigue.

moderate caffeine intake is generally considered safe.

some energy drinks contain very high levels of caffeine.

caffeine can enhance physical performance during exercise.

decaffeinated coffee still has a small amount of caffeine.