Darker roasts do burn off caffeine but it also makes the bean more soluble. Testing has concluded that in the end lighter and darker roast cups end up with generally the same caffeine concentration.
This is probably robusta coffee, which has 2x the caffeine compared to arabica.
Darker roasts do burn off caffeine but it also makes the bean more soluble. Testing has concluded that in the end lighter and darker roast cups end up with generally the same caffeine concentration.
This is probably robusta coffee, which has 2x the caffeine compared to arabica.