Given a text, output a summary of the text with a maximum of 100 words.
Input: Caffeine is a stimulant drug, which is found naturally in Coffee, tea, soft drinks, chocolate and energy drinks. Caffeine affects different people in different ways, and has both positive and negative health effects. It can improve alertness, focus, and concentration; however, high doses of caffeine may lead to insomnia, increased heart rate, increased blood pressure and other side effects.
Caffeine is a stimulant drug found in coffee, tea, soft drinks, chocolate and energy drinks. It can improve focus, concentration and alertness, but high doses can lead to insomnia, increased heart rate, increased blood pressure and other negative side effects.
Caffeine is a substance found in coffee, tea, soft drinks, chocolate and energy drinks. It can increase alertness, concentration and focus, but at higher doses it can lead to insomnia, increased heart rate and blood pressure. Its effects on health are mixed, so it is important to monitor consumption and maintain caution.