Is it true that espresso has less caffeine than regular coffee?

Yes and no. An espresso cup has about as much caffeine as a cup of strong coffee. But servings for espresso are much smaller. Which means that the content of caffeine per milliliter are much higher than with a regular brew. Moreover, caffeine is more quickly assimilated when taken in concentrated dosages, such as an espresso cup.

The myth of lower caffeine espresso comes comes from the fact that the darker roast beans used for espresso do have less caffeine than regularly roasted beans as roasting is supposed to break up or sublimate the caffeine in the beans (I have read this quote in research articles, but found no scientific studies supporting it. Anybody out there?).

One more thing that should be considered when comparing caffeine content of espresso is whether the beans are arabica or robusta. Robusta has about twice as much caffeine as arabica therefore a coffee blend starting with a large amount of robusta will have more caffeine regardless of prep method. Many (but not all) supermarket brands of coffee have a fair amount of robusta mixed into the blend to keep production costs low. Some espresso blends have between 4% and 12% robusta. The robusta is uses for a combination of reasons not least of which is flavor and better crema production. Many espresso blends have no robusta at all. For a good espresso blend price is not the reason for adding robusta and a good quality robusta is actually much more expensive than a cheap arabica bean and somewhere on par with a similar relative quality arabica.

Here's the caffeine content of Drip/Espresso/Brewed Coffee:

Drip            115-175	     (7 oz cup)
Espresso        100         1 serving (1-2oz)
Brewed          80-135     (7 oz cup)
Obviously these numbers are estimates at best.

Comments

How do they measure that? or

How do they measure that? or is it just an estimation for the amunt of coffee?
if they measure the amount of caffeine after the process I would believe it. And where is the article by the way?

does anyone know

If you make an espresso AND a single-drip coffee with the exact same amount of the exact same type of coffee in each, which one has more caffeine? Not based on the kind of coffee or the amount of it, just on the way they're brewed, which method gets more caffeine out of it????????????????? 

SAme Amount

Judging by the caffeine content table below the article, the same amount of each coffee would have quite a higher caffeine content in the espresso coffee.

Espresso and single drip caffeine difference.

- SINGLE DRIP -To answer the question above as best as I can, caffeine Is derived over time, meaning the longer the "hot water" is going thought the coffee grinds the more caffeine is derived. Of course there's only so much caffeine content in the amount of grinds being used as well as the roast playing a part. In short the single drip will have more caffeine. To elaborate a touch more, the dark roasted coffee tend to have less caffeine because the roaster "burns" some of the content out ( I've read ) but will have a stronger, more robust flavor that will pop right away. Where as the medium roast tends to have the most caffeine because the roaster heated the bean to the point that we could derive the most from it and have a full bodied rich flavor without kicking you in the teeth. The light roasted coffee have been heated enough to release most of the caffeine from the bean and has a soft subtle flavor, a great starter roast if you ask me.

NOW If you're looking for the most caffeine go with a medium roast, and get a pirculator set the switch to dark follow coffee sugested serving amounts and go with it, BUT be aware that you can get immune to it and caffeine will not all ways " wake " you up in the morn. Use it strong only when you need to for best results this is my study and I've been at it for 7 years same goes for energy drinks, ever wonder why they got super sized- because they quit working for the everyday users and big ones quit working too. Thanks for your time and sorry to rant!!!!

Espresso in Tampa

I live in Tampa, and we get good espresso here. I buy espresso, and mix it with regular coffee, and use it in my drip coffeemaker. It works great. 

Caffeine and Expresso

I was taking to Barrista who explained that Expresso can be made without Caffeine using the the right grind and water temprature  and brew time But he did say there were very few machines that achieve this He explained that intially pure coffee tast is released from the bean and the caffeine follows later Can anyone cofirm this

espresso isn't a bean or a

espresso isn't a bean or a roast it is a method of production.  unless you make it in an espresso machine it isn't espresso, no matter what it says on the bag.  you are simply blending two different coffees, one of them happens to be marketed as being good for making espresso.  blending different coffee can be great, if you came up with a combination you like, keep doing it.

RE: Caffeine and Expresso

Your barista does not know what they are talking about. You can make decaf espresso but only if you use decaf beans. There is a decent chance this barista also does not have good technique if they are so ill-informed. Find a new shop.

Hmmm.... I think this

Hmmm.... I think this barista is actually talking sense, even if they may be exaggerating and taking things to extremes of extrapolation.

Caffeine takes the longest to extract from coffee out of all the flavonoids, oils etc. By passing steam through faster (higher pressure) then less of this caffeine will be extracted.

We use finer grinds for espresso so that there is more surface area, contact area, for extraction when passing the steam through so quickly. Reduce this surface area by using a less fine grind and of course less will be extracted with the slower extracting substances being effected the most (caffeine being the slowest).

A combination of the two will yield a lower caffeine espresso and who's to say, unless you have direct experience, that the caffeine in theory couldn't be reduced to near decaf levels?

Do you have such experience Daniel? I feel you may be making assertions that are above your level of knowledge here.. whilst also losing an experienced barista some deserved business.

Due to this slower extraction of caffeine than any other substance from the coffee, slower brewing methods like filters or a cafetiere will extract more caffeine than faster ones such as using an espresso machine.

Therefore it is NOT a myth that an espresso has less caffeine per amount of coffee used or per serving (however one wishes to gauge it). However, as with all comparisons, you need to compare like with like to gain any real meaning and it may be untrue depending on the detail. Google it and you'll find most informed blogs and articles saying the opposite to you, they call it a myth that espresso is stronger in caffeine and explain why it is a myth.

It would be more informative to say that the espresso method yields less caffeine, all things being equal, but that the actual level of caffeine across all methods depends upon the grind, the bean, the roasting etc

Incorrect Chemistry

You're wrong about caffeine being one of the last to extract; most of the caffeine is extracted from the brew in the first  minutes (or even moments) of the extraction in hot water. Reference from Wikipedia: Pure anhydrous caffeine is a white colorless powder with a melting point of 227–228 °C. Caffeine is moderately soluble in water at room temperature (2 g/100 mL), but very soluble in boiling water (66 g/100 mL).[108] It is also moderately soluble in ethanol (1.5 g/100 mL).[108] 
Basically, caffeine is REALLY soluble in boiling water, so it will extract out immediately. I can't speak to the solubility of the flavanoids (caffeine is not a flavanoid, btw, it's a xanthine derivative), but this barrista clearly does not know what he's talking about.
You could theoretically make a decaf cup of anything by tossing the first portion of the extract after it has passed through the grounds, then keeping the remaining extract.
 

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