Grapefruit May Extend Caffeine's Effects, Says Chemistry Professor

Eating grapefruit alongside your coffee or tea could potentially prolong the caffeine buzz, according to recent studies.

Chemistry Professor Michelle Francl suggests grapefruit can increase the duration of caffeine in the system, while cabbage, broccoli, and brussels sprouts may accelerate its clearance.
Francl's previous advice on adding salt to tea sparked a diplomatic conversation and criticism, particularly from the UK, leading to a humorous response from the US Embassy.
The suggestion to combine grapefruit with caffeine beverages is based on the fruit's interaction with caffeine metabolism, although some researchers argue it may not significantly alter caffeine's effects.
Francl's research into tea-making methods, including the use of earl grey for anxiety relief and the importance of mug size and material, aims to enhance the drinking experience.
The controversy over Francl's tea and coffee recommendations highlights cultural differences in beverage preparation, including the US Embassy's joke about microwaving tea.