| It increases the heart rate, makes muscles contract more forcefully and enhances the general state of alertness. |
| The stimulant effects of caffeine in coffee are well known to help improve energy and alertness. |
| Its taste was pretty similar to dark balsamic vinegar, but my tastebuds may have been past their peak of alertness by then. |
| The amino acids glutamine and tyrosine will improve concentration, retention and a sense of alertness. |
| The malnourished suffer from impaired health, reduced physical strength, diminished mental alertness, and high rates of infant mortality. |
| All had varying degrees of confusion, lack of alertness, agitation, anxiety, insomnia, depressed mood, and irritability. |
