- Dark chocolate: When you eat dark chocolate, compounds in cocoa called flavanols produce a surge in blood flow to the brain. That helps you feel awake and alert.
- Citrus fruits: Just sniffing them can stimulate alertness. Eat an orange, and you also benefit from vitamin C.
- Water: Just about every system in the body suffers when we're dehydrated, including the brain. So, keep a reusable bottle or cup on your desk to remind you to drink.
- Coffee or tea: Caffeine keeps you alert and also boosts cognitive performance, concentration and focus.