Caffeine...Friend or Foe?
While many of you are probably accustomed to the word caffeine being associated with productivity, happiness, and sanity… you now find yourselves moving into a love/fear relationship with your old friend. The best remedy? Knowledge…
The amount of caffeine in a cup of coffee depends on many factors. In the table below we’ve summarized the general rules about what makes coffee more or less caffeinated.
1 The Bean - Two main species of coffee plant are used to produce coffee. Coffee Arabica constitutes 75% of coffee beans grown worldwide. On average, it has 1.1% caffeine. Coffee Robusta is the second most popular bean and is often used as a filler for Arabica blends. It has, on average, 2.2% caffeine.
2 The Roast – Because beans expand during roasting, beans that are roasted longer (dark roast) are generally larger than beans that are roasted for a shorter period (light roast). As a result, dark roasted beans have more caffeine by weight (using a scale) but light roasted have more caffeine by volume (using a scoop). Since measurement practices may differ, if you’re at a coffee shop it’s always a good idea to ask about caffeine level.
3 The Size of the Beverage - Ounce for ounce, espresso (~40 mg/oz) has more caffeine than drip coffee (~10 mg/oz). However, when you look at standard serving sizes, a 2 oz double espresso shot of espresso has 80 milligrams of caffeine compared to 120 milligrams in a 12 oz. cup of drip coffee.
For a more in-depth look at this topic we have gathered information here.