Yes, if by extra bold you mean dark roast. Caffeine is destroyed by heat, so the longer roasting reduces the caffeine content of dark roast coffee (contrary to popular opinion which thinks of dark roast coffee as "stronger" somehow). By the way, the darker roast also burns off many of the subtle flavors in good coffees, which is why a lot of mass-market coffee shops over -roast their coffee, to disguise the poor quality of the beans they are using. Ergo, dark roast coffee means less caffeine, less coffee flavor (but more of that delicious charcoal flavor) and thinner body.
Light roast coffee typically has the least caffeine content compared to medium and dark roast coffee.
To make high caffeine coffee at home, use a dark roast coffee bean and grind it finely. Brew the coffee using a method that extracts more caffeine, such as a French press or espresso machine. You can also add an extra shot of espresso to increase the caffeine content.
Light roast coffee typically has the least caffeine content among all types of coffee roasts.
Some popular coffee roast names include light roast, medium roast, dark roast, French roast, and espresso roast.
Because the caffeine is lost during the brewing process. But also during the brewing process, mass of the coffee bean (coffee seed to be technical about it) is reduced. So if you brew it by WEIGHT and have equal mass, the result will be MORE caffeine in the dark roast but if you brew it by quantity in the scoop, it will have less.
Coffee can have many different brews, flavors, and roasts. Unless the container specifies that is it decaffeinated or of a lower caffeine content, it has a normal caffeine content.
The different types of ground coffee available in the market include light roast, medium roast, dark roast, espresso roast, and flavored coffee.
Dark roast coffee typically contains more caffeine than light roast coffee, which can help keep you awake longer.
The caffeine content of Dunkin' Donuts Dark Roast Coffee is less than milder version because of the longer roasting time. However, the precise caffeine content is unknown.
Folgers Classic Roast is a Medium Roast Coffee. Other Folgers varieties are available in Light Roast (Breakfast Blend) and Dark Roast (Black Silk)
To get the most caffeine out of coffee, use a higher ratio of coffee grounds to water when brewing, choose a darker roast, grind the beans finely, and brew the coffee for a longer period of time.
To maximize the caffeine content in your coffee, choose a darker roast, grind the beans finely, use a higher coffee-to-water ratio, and brew for a longer time.