In tea, one such compound is theanine, a non-proteinogenic amino acid associated with improvements in cognitive function. While supplemental caffeine is sometimes consumed in isolation, naturally-occurring caffeine is found in foods alongside other bioactive ingredients. Some data support beneficial effects of lower doses of caffeine (~ 1 mg/kg) on attention, alertness and reaction time, although limited information is available concerning the effects of low doses of caffeine on both cognitive and physical performance, particularly in athletes or other active individuals.
It has also been reported that caffeine intake can improve cognitive performance in the context of physical fatigue or sleep deprivation. As such, caffeine is commonly used to suppress feelings of fatigue and increase feelings of energy and concentration.įurthermore, caffeine consumption has been reported to enhance several aspects of performance at doses of ≥3 mg/kg body weight, including vigilance, reactive agility and physical performance in maximal endurance exercise and high-intensity intermittent exercise. Thus, caffeine can increase levels of dopamine, acetylcholine, and serotonin. Caffeine is known to have stimulatory effects on the central nervous system via antagonistic action on adenosine receptors. One of the most popular of these substances is caffeine, which is commonly consumed worldwide and is present in a broad array of dietary supplements. Furthermore, many of these compounds are isolated or purified and utilized in dietary supplement formulations.
As such, it is well known that a variety of compounds found in food and beverages are bioactive and may alter mental and physical performance. When consumed, such compounds could alter focus, attention, and reaction time. Compounds that could potentially enhance mental and physical performance could have importance in tasks of daily living and to various athletic populations.
0 kommentar(er)
