Does green coffee have more caffeine than roasted coffee?

Green coffee beans contain slightly more caffeine by weight compared to roasted coffee beans, as the roasting process reduces the overall mass of the beans and can lead to some loss of caffeine. However, when brewed, roasted coffee typically has a higher caffeine content in a standard serving due to the brewing process and the amount of coffee used. In practical terms, brewed roasted coffee generally provides more caffeine per serving than brewed green coffee.