According to the Doka Coffee Plantation located in Costa Rica The amount of Caffeine in the darkest roast coffee (Espresso) is no higher than their breakfast blend. The belief that the dark roasts have more caffeine is a common misconception caused by the stronger taste.
Stronger tasting coffee has been roasted 3 times longer than breakfast blends. It can also be because a better bean has been used.
Robusta and Arabica are the 2 types of beans grown. Arabica are the higher grade and more expensive because of the delicate nature. They are susceptible to disease.
Robusta beans are hearty and disease resistant and have more caffeine and less sugar but are not the top quality.
Picking less than full ripe beans can lower the quality of the coffee .
Bottom line: while a coffee taste stronger it is not higher in caffeine and wont rev you up.
Decaffeinated Coffee: The Germans are one of the biggest removers of caffeine because they have a non chemical process. They do it with water. They do it for the coffee growers for little to no cost. They in turn sell the caffeine to companies like Coca Cola, Pepsi and candy makers.
If the coffee is decaffeinated by water it usually will say it on the package. No company will say it was done with chemicals on the package .
Paul Spina