It is important to recognize that dark roasted beans have higher caffeine than light roasted beans because they have a higher dehydration loss rate and must be brewed with more coffee beans, resulting in more caffeine. Caffeine has a melting point of 237 degrees Celsius, so roasted caffeine remains almost intact and dissolves in the cup. It is often mistaken that dark roasted beans have lower caffeine than light roasted beans, but the opposite may be true. Because dark roasted beans have a high dehydration weight loss rate, more coffee beans must be brewed, resulting in more caffeine. Therefore, it is important to realize that dark roasted beans have higher caffeine than light roasted beans.
