Ep20. Do light or dark roasts have more caffeine?

In this episode Chris and Doran discuss the age-old question of whether dark or light roast brewed coffees have more caffeine. The discussion was inspired by a paper published recently in Scientific Reports titled, "Caffeine content in filter coffee brews as a function of degree of roast and extraction yield". So, do light and dark roast coffee extracts have different caffeine concentrations? The paper is open access and available from the publisher: Sci. Rep., 2024, 14, 29126 https://doi.org/10.1038/s41598-024-80385-3 Introduction preamble: Captain Janeway.