Does Old Coffee Lose Caffeine6 min read

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In this short article, we’ll answer the issue, “does old coffee lose caffeine?”, how lengthy does coffee (stored and made) retain its caffeine content, and several other interesting details concerning the chemicals contained in old coffee.

Does Old Coffee Lose Caffeine?

No, old coffee doesn’t lose caffeine.

However some from the options that come with coffee start to degrade right after being uncovered to air, for example its taste, color, and aroma, caffeine is a lot more stable and may last for several weeks with no significant alterations in potency.

A freshly made mug of coffee that’s been left around the counter for hrs will retain its caffeine content it simply doesn’t evaporate such as the flavonoids contained in coffee.

This explains why old or spent coffee tastes bitter the flavorful ingredients have deteriorated, departing behind only bitter-tasting caffeine.

So, unless of course you particularly remove caffeine from espresso beans making a decaffeinated version, coffee will retain its caffeine content.

Caffeine is really a naturally sourced compound contained in various drinks and foods that increase performance and supply a lift of one’s. This water-soluble alkaloid is really a stimulant that functions on the central nervous system.

Do Old Coffee Grounds Lose Caffeine?

Again, no old coffee grounds don’t lose caffeine. As pointed out, caffeine is pretty a lot more stable than the majority of the other chemicals present in coffee.

Most likely the only real striking distinction between coffee produced from fresh grounds which produced from coffee grounds which are several days or several weeks old may be the flavor.

To put it simply, the older the causes, the milder and fewer complex the flavors, however the concentration of caffeine remains pretty much exactly the same.

However, roasting can slightly modify the caffeine content from the beans. Caffeine is definitely an alkaloid that’s thermally stable. A lot of it sheds throughout the roasting process, but a small sector might be lost throughout the sublimation process. Additionally, alterations in the microstructure of espresso beans occur during roasting. The pores close, which plays a role in the buildup of inorganic gasses within the beans. Pressure inside increases, which in turn causes these to crack (characteristic crackling sounds), and, combined with the roasting gas, a tiny bit of caffeine can also be released. Caffeine losses might be greater at greater roasting temperatures (1).

How Long Does Caffeine In Coffee Last?

If coffee is stored under optimal conditions, its caffeine content could possibly last longer than the many other chemicals and also the coffee grounds’ attributes, including flavors and oils – almost 4 years generally of roast coffee.

Optimal storage conditions include:

  • Awesome, dark atmosphere
  • Insufficient moisture
  • No contact with direct heat or sunlight
  • No sudden variations in temperature
  • No insects or rodent invasion

Besides optimal conditions, the packaging material ought to be moisture and oxygen resistant. Research compared different packaging materials for that storage of roasted ground coffee for 12 several weeks at 28°C and 80% (RU). There is a loss of revenue of phenolic compounds in coffee kept in aluminum-laminated polyethylene and polyethylene terephthalate packages. No significant changes were observed for that caffeine content (2).

Caffeine content and flavor also rely on the brewing process used. For example, filter coffee doesn’t taste as strong as espresso since the latter contains less water and it is more concentrated. However, its caffeine submissions are greater, because the water draws more caffeine in the espresso beans. The caffeine amount within the coffee depends upon the next factors: the influence of species, brewing time, temperature of water, pressure, amount of roast, grinding degree, water type, water/coffee ratio along with other factors (for example geographical origin) (1).

Caffeine Content Of Different Types Of Coffee Beans

Probably the most created and consumed coffees, referred to as Arabica and Robusta, differ considerably within their caffeine content. Robusta (including all types of Coffea canephora) contains more caffeine than Arabica (1). Listed here are the caffeine items in different types of espresso beans:

  • Arabica beans contain only one.five percent caffeine content. They’re sweeter than other varieties and don’t taste earthy and harsh. These beans are generally grown for a number of flavors and aromas and convey finer and much more delicate coffee.
  • Robusta beans contain 2.7 % pure caffeine and also have a more earthy and burnt flavor. They may be used by themselves and in a mix of different proportions.

Caffeine is created in unripe espresso beans and it is amount increases because they mature. The greater content of caffeine in Robusta coffee is a result of the higher expression of certain genes, for example CaXMT1, CaMXMT1, and CaDXMT2, that are connected with caffeine accumulation in espresso beans (1).

Another factors that influence how lengthy caffeine can last inside a bag of coffee range from the time passed because the espresso beans were processed, how intensely these were infused, how lengthy has got the bag been opened up (if it’s being used), so when was the coffee ground.

Furthermore, even used coffee grounds, or individuals which are past their expiry date generally have a large amount of caffeine inside them. Again, this is due to the compounds’ stability as well as because caffeine is probably the last ingredients to obtain extracted in standard coffee brewing.

What Happens To Caffeine If You Reheat A Cup Of Old Coffee?

Nothing truly the caffeine content remains because it is. Reheating coffee only evaporates a lot of what remains from the coffee’s aroma. However, it’ll make the flavour worse. Massive odor and flavor losses are the result of water solubility of essential oils of coffee and also the formation of volatile flavoring substances with oxygen, mentioned the alternation in aroma might because of oxidation, where aroma compounds oxidized to make a new volatile compound therefore the coffee aroma fades (2).

Which means that reheating a formerly hot cup of freshly made coffee won’t have the taste and aroma that you’re searching for, but it’ll still have the ability to provide you with that kick which comes from caffeine stimulation.


In this short article, we’ll answer the issue, “does old coffee lose caffeine?”, how lengthy does coffee (stored and made) retain its caffeine content, and several other interesting details concerning the chemicals contained in old coffee.

For those who have anymore questions or comments please tell us.


  1. Olechno, Ewa, et al. Influence of numerous Factors on Caffeine Content in Coffee Brews. Foods, 2022, 10, 1208.
  2. Agustini, Sri, and Mimi Kurnia Yusya. The result of packaging materials around the physicochemical stability of ground roasted coffee. Curr Res Biosci Biotechnol, 2020, 1, 66-70.

Charlotte brooke

Hi, I’m Charlotte now, I really like cooking as well as in these existence, I had been a chef. I bring a number of my experience towards the recipes about this hub and answer the food questions.