The brewing method can be a big factor in contributing to how much caffeine is in a cup of coffee. There are over 20 unique methods for brewing coffee, I have listed the top 10 most common methods of brewing coffee below.
Your recommended daily intake of caffeine is 400 milligrams. Typically, an 8-ounce (236ml) brewed cup of coffee contains around 100 milligrams of caffeine this would account for 1/4 of the recommended daily intake. Whereas a cup of regular instant coffee contains about 62 milligrams of caffeine. At the opposite end of the scale is a one ounce shot of espresso which contains massive 65 milligrams of caffeine pair ounce. Even a decaffeinated coffee despite the name contains caffeine! A typical decaf coffee contains approximately 2 milligrams of caffeine.
One of the main influences which affects the amount of caffeine in a cup of coffee is the origin of the coffee Bean used. There are over 120 different species of coffee plant and the beans from these various species have different caffeine contents. The two most popular are “Arabica” which alone accounts for 70 to 80% of the world’s coffee production, and “Robusta” which accounts for 20 to 30%. Caffeine content of Robusta beans is strong and contains roughly twice as much caffeine as Arabica beans. The Arabic beans contain approximately 32 to 40 grams of caffeine per kilo dry, whereas the Robusta beans contain 65 to 85 grams of caffeine per kilogram dry.
Another key factor which can affect the amount of caffeine in a cup of coffee is the roast level. Basically, the roast level is the time they have roasted the coffee bean, see our guide to roast levels here. As a general rule of thumb, the longer they have roasted the bean the less the caffeine content. Light roast coffees contain much more caffeine than dark roast coffees, because the caffeine has burned away during the roasting process.
Quantity Per cup
The amount of coffee in your Cup or the quantity, also determines the amount of caffeine. 1 US fluid ounce is 29.5ml, a regular coffee is 8-ounces which is 236.5ml.
Recent studies have shown 95% of adults in the United States consume caffeine contain from different food and drink products excluding coffee. The amount of caffeine consumed in these products is between 100 and 250 milligrams of caffeine daily. So you see coffee is not the only source of caffeine in our daily diet caffeine is contained in varying quantities in other foods and drinks. One such example of this is Tea, An 8 ounce equivalent cup of green tea contains 28 milligrams of caffeine. A regular 11 ounce (330ml) kind of Cola contains 33 to 40 milligrams of caffeine. Chocolate contains 12 to 25 milligrams of caffeine per 1-oz serving, this depends on the cocoa content.
How much caffeine is too much caffeine? Well, the American dietary guideline recommends adults consume only 400 milligrams of caffeine per day. This would mean four 8-ounce brewed cups of coffee per day, which is two less than I would have on a regular day..
There are many benefits to consuming higher amounts of caffeine in your diet. Below are Seven such benefits.
Believe it or not, caffeine accounts for a large percentage of antioxidants in the western diet. Caffeine itself is high in oxidants and many studies have shown the average Joe gets more antioxidants from his or her coffee consumption then from fruit and vegetables combined.
Another amazing thing about caffeine is that caffeine contains so many nutrients, for instance Caffeine a regular cup of coffee contains 11% of your recommended daily intake of vitamin B2 riboflavin. Considering this 11% of daily recommended intake is 11% per Cup, this can really add up to a substantial quantity of your advised daily intake.
A regular cup of coffee contains 6% per cup of the recommended daily intake of vitamin B5. Coffee contains 3% of your recommended daily intake of magnesium and potassium which once again is 3% per Cup. An additional 2% per cup of your recommended daily intake of vitamin B magnesium. Taken by themselves these are small percentages, but over 4 or 5 cups of coffee a day these add up to be a considerable volume of nutrients.
The next time you go to a health food store to pick up any commercial fat burning supplement and when you read the ingredients don’t be surprised that the supplement contains caffeine. The reason for this simple caffeine is one of the few known natural substances which has been proven to boost your metabolic rate, which burns fat. Studies have shown that caffeine can increase your metabolic rate by 12% which can increase fat burning by a massive 10%!
There are four factors which dictate the varying amount of caffeine per cup of coffee. What I’ve learned is caffeine is a great source of nutrients, a source of antioxidants and a natural appetite suppressant, which can stave off many neurological problems later in life. I would always recommend checking the amount of caffeine contained per serving in the ingredients section of any product. I hope this guide has cleared up most of your questions about caffeine if there are any more questions you have, please comment below. Enjoy your coffee.