Flexible Economy is a new enhanced Economy service operating on a single cabin aircraft for customers on our shorthaul network flying to and from London Heathrow.
Although caffeine is generally safe and well tolerated, it can cause side effects when ingested in large doses. Additionally, regular caffeine use can cause dependency, resulting in withdrawal symptoms when caffeine is not consumed. Headaches can be a symptom of either too much caffeine or too little.
Symptoms of Too Much Caffeine. Many people drink coffee, cup after coffee cup, in an attempt to increase their energy from another hit of caffeine. Instead of feeling more energized, they start to experience energy crashes and find they canât get off the caffeine roller coaster.