頭痛

「Caffeine is a central nervous system stimulant that can improve sports performance and aspects of cognitive function. Caffeine or caffeine-containing beverages are often taken to help restore alertnes」

「Caffeine is generally recognized as safe when used in cola-type beverages in accordance with good manufacturing practice.」

「Single doses of caffeine up to 200 mg (about 3 mg/kg bw) from all sources do not raise safety concerns for the general healthy adult population. The same amount of caffeine does not raise safety concerns when consumed less than two hours prior to intense physical exercise under normal environmental conditions. Caffeine intakes from all sources up to 400 mg per day consumed throughout the day do…」