Today I found out that an espresso actually contains less caffeine than a brewed (regular) coffee.
This would be due to the simple fact that when making an espresso, the water doesn't stay long enough in contact with the coffee and so the caffeine doesn't get trap in/by the water.
|Type of coffee||Size*||Caffeine✝|
|Brewed8 oz.||(237 mL)||95-200 mg|
|Brewed, decaffeinated8 oz.||(237 mL)||2-12 mg|
|Brewed, single-serve varieties8 oz.||(237 mL)||75-150 mg|
|Brewed, single-serve varieties, decaffeniated8 oz.||(237 mL)||2-4 mg|
|Espresso, restaurant-style1 oz.||(30 mL)||47-75 mg|
|Espresso, restaurant-style, decaffeinated81 oz.||(30 mL)||0-15 mg|
|Instant8 oz.||(237 mL)||27-173 mg|
|Instant, decaffeinated818 oz.||(237 mL)||2-12 mg|
|Specialty drink (latte or mocha) 8 oz.||(237 mL)||63-175 mg|
Adapted from Journal of Food Science, 2010; Pediatrics, 2011; USDA National Nutrient Database for Standard Reference, Release 26; Journal of Analytical Toxicology, 2006; Starbucks, 2014; Food and Chemical Toxicology, 2014; Keurig, 2014
* Sizes are listed in fluid ounces (oz.) and milliliters (mL).
✝ Caffeine is listed in milligrams (mg).