They also report increased energy and better mental alertness during the day.

Green tea is used to improve mental alertness and thinking.

But he lacked mental alertness that night, having suffered a cold over the last several days before the fight.

I am unused to such mental alertness off the battlefield.

Mild heat exhaustion does not cause a change in a person's mental alertness and usually can be treated at home.

Mental alertness can be affected, especially if the person does not drink enough liquids.

"That kind of specific training is of less interest than being able to maintain a mental alertness."

Avoid activities requiring mental alertness and coordination until drug effects are realized.

Human clocks control changes in body temperature, blood pressure, mental alertness and many other rhythms.

Increasing mental alertness, due to the caffeine content of green tea.