The two types of coffee with the most caffeine are Robusta and Arabica.
Robusta coffee beans contain almost twice as much caffeine as Arabica beans.
Robusta coffee is often used in espresso blends because of its strong flavor and high caffeine content.
Arabica coffee is the most popular type of coffee and is known for its smooth, mild flavor.
Arabica coffee beans contain less caffeine than Robusta beans, but they are still a good source of energy.
The amount of caffeine in coffee can vary depending on the brewing method and the type of coffee bean used.