How does the proportion of Arabica and Robusta varieties affect the amount of caffeine?
In terms of the proportion of Arabica and Robusta varieties, Arabica typically contains less caffeine than Robusta. Some coffee blends contain both Arabica and Robusta, which can affect the overall caffeine content of the blend. A blend that contains more Robusta beans will have a higher caffeine content than a blend that contains mostly Arabica.
It's worth noting that caffeine content can also vary depending on the growing conditions, roasting method and brewing method. So, it's always a good idea to check the label or ask the barista for the caffeine content of a specific coffee before consuming it.