Questions tagged [caffeine]

Caffeine is a stimulant drug with a bitter taste. It is produced naturally by coffee plants. It can survive the heat of roasting and is water-soluble, so brewed coffee will contain caffeine. Use this tag for questions relating to caffeine content.

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Optimizing caffeine intake for productivity without building tolerance

I really like caffeine, taking it after being clean for a while gives a slight euphoric feeling and mental clearness. However, I know that these effects dwindle with tolerance. Hence, I wonder if ...
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3 votes
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What is high caffeine coffee in turkey?

I live in Istanbul, I love espresso, but most espresso here are 100% Arabica. Robesta coffee is hard to find. What alternative coffee do you recommend to get the right caffeine during the day?
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Is there any difference (besides caffeine content) between decaf and regular coffee?

Is there any real difference between these two types of coffee? Say for example I have beans from the same crop of coffee, I send half through the decaffeination process and the other half I don't. ...
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Conflicting information regarding caffeine content in an espresso?

According to the USDA, the caffeine content in 100 gram of brewed coffee is about 40 milligram. According to the USDA, 100 ‎gram of restaurant-prepared espresso contains 212 milligram of caffeine. ...
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How does espresso-based coffee compare to instant coffee?

When I buy coffee from outside, from whatever popular brand outside, and drink it, I feel a bit elevated. Especially one with higher caffeine content. However, when I drink the one I make my own I ...
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Sumatra or Espresso More Acidic?

I am looking for a less acidic caffeinated drink. Currently Sumatra is the least acidic coffee I’ve found but was wondering if espresso is better since it’s less liquid and has the same amount/more ...
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Capsules and caffeine: How many Nespresso capsules are too many for a days? Is caffeine content different in different types of capsule? [closed]

And the last question here: is there a big difference between squeezing a capsule once and twice concerning caffeine content?
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Does L-theanine affect caffeine's half-life?

Does consuming L-theanine with caffeine, either in drink (like matcha) or in pill form, affect the half-life of caffeine? I have heard something like "L-theanine slows caffeine absorption", ...
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Is coffee with milk a health risk?

Recently a friend of mine told me that caffeine together with milk can create some carcinogenic compound. I haven't heard about it so far, neither found an article about it on google. Is there any ...
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Would method of ingesting coffee affect its effectiveness in terms of caffeine extraction to the body?

I have some instant coffee powder packs that include coffee, milk, and sugar in a single packet. Lately, due to circumstances related to limited time and availability of electricity, I've been ...
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How could you feel the caffeine effect most quickly?

Which will take effect quicker? Drinking a cup of instant coffee or eating raw powdered coffee?
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Aeropress: does filling it full with water increase the caffeine content of my cup?

How does the amount of water I pour into an Aeroporess impact the caffeine content of my cup of coffee? If I make two cups, for cup A I use just enough water so that the 1 is covered on the ...
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Is there a way to prevent acid reflux and gastritis while benefiting from cafeine?

I've read that Caffeine has some properties that relax the stomach sphincter and may lead to acid reflux which causes heartburn and other stomach problems. Is there a way to enjoy coffee and other ...
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Is coffee a drug that you could give to your dog?

Sometimes questions are very short and answers very long. We all like coffee, but, would you give coffee to your dog?
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Caffeine content of different brewing methods

For a given type of bean, do different brewing processes and temperatures (drip, French press, Mocha, espresso, cold brew, etc.) produce coffee with different caffeine content? It would seem ...
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How much does caffeine concentration in a cup of coffee decrease as a function of time (roughly)?

For example, if I let a cup of coffee sit for 1-2 hours, would the amount of caffeine I get mostly be the same? Or does it decrease?
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Roughly how strong is one shot of espresso compared to a cup of drip coffee? [duplicate]

Every morning, I have one 12 oz. cup of drip coffee, to the point where I have become dependent on it. When I’m traveling, it’s often hard to find someone who will make me a straight cup of coffee. I ...
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It is good for my health to drink coffee 10 times a day?

I am working on a computer 15 hours a day, and I feel tired and sleepy a lot between the work. So I prefer to drink coffee to get rid of tiredness. Coffee gives me an energy boost and makes me able to ...
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6 votes
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Does hydration level change the effect of caffeine?

Apologies if this question does not belong here, it may be suit for the chemistry site, but it pertains to the consumption of coffee directly -> so here it is. Does your prior level of hydration ...
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What is the most effective way of consuming coffee (and caffeine in general)?

I generally drink 1–2 cups of coffee per day, between 09:00–12:00. I switch to teas after lunch so I'm not still full of caffeine by the time I go to bed. I wouldn't say that's heavy usage by any ...
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1 vote
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Am I psychologically addicted to coffee?

I do not really mind if I am addicted to coffee. However, I noticed a psychological effect and that makes me kind of curious. When I do not drink coffee, I feel more negative about life. Caffeine ...
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How coffee activates the nerve cells of the brain and what is the mechanism of it?

After drinking coffee we feel so relaxed and our brains feel so free. Why this happens?
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Is one cup of coffee a day good? [duplicate]

Is there any effect of drinking coffee daily? Is coffee harmful for health?How can I make my coffee healthier? Are there any benefits of drinking coffee daily?
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Does coffee help if you are tired because you have over slept?

If you have over slept and was drowsy because of this, would coffee give you an effective boost to get your day started or would you be better off with something like a sugary soda?
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What should be the daily coffee intake?

I am from Pakistan. Summers here are very hot. My question is how many cups of coffee are recommended as a daily intake in summers? should the daily intake of coffee vary in summers and winters?
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2 votes
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How much caffeine delivered by eating coffee grounds

I eat coffee grounds. I have size 000 capsules (just think of the size of the largest supplement capsules you may have seen), a capsule maker, and some Death Wish (which they tout as premium Ruousto, ...
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Sweating due to coffee intake

I sweat a lot. I have tried so many methods to combat sweating but none of it worked. Antiperspirants and other home remedies didn't work at all. I don't have enough money to go for botox or other ...
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7 votes
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What are the effects of caffein olfaction?

Does smelling caffeine share equivalent effects on our central nervous system to those immediately apparent when ingesting? More precisely, does the aroma of coffee necessitate a beneficial ...
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Is coffee/caffeine addictive?

I've heard that people get addicted. In other words, if someone has coffee regularly and they skip a day, then on that day they feel "low" or perform worse than they used to when they weren't a coffee ...
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3 votes
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How much caffeine is in 1 teaspoon of ground Arabica coffee?

Arabica is said to have less caffeine than Robusta. Couldn't find info about this specific question in Google hence asking here. The grind I have is for filter coffee.
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How long do the effects of caffeine take to appear?

Taking as a parameter the first sip of coffee we drink, and taking 10 minutes to drink a cup of coffee, how soon are the effects of caffeine to appear?
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Additions to decaff coffee to complement taste

I'm alternating drinking decaf bean coffee (O2 process) alongside caffeinated beans. Normally I drink caffeinated either black or with a little milk. With decaf, the reduced body of the taste is ...
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Caffeine and Hearing loss

What amount of coffee has an ototoxic effect after an acute noise exposure? I'm referring to this study: https://www.ncbi.nlm.nih.gov/m/pubmed/26940042/ I know that they use 25mg/kg which equals ...
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4 votes
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Will I get dehydrated from drinking coffee?

In fact, 54 percent of Americans over the age of 18 drink an average of 3.1 (8 oz) cups per day; the equivalent to 40 billion dollars spent solely on the ever-so-popular cup o' Joe. With over half of ...
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Finding if coffee is a health risk after best before

I have couple of coffee in my cabin where I visit on weekend and I saw 2 coffee which were best before xx 2017. One has big chunk of coffee and looks faded and the other got faded colour. I have no ...
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How bad is it for people with nervous tension to have coffee?

I am suffering from nervous tension and anxiety. Doctors have prescribed me regular anxiety reliever drugs and also asked me to completely stay away from tea, coffee, cola or any other beverages ...
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What is the caffeine content in Lavazza brand coffee

What is the caffeine content of the Italian coffee LAVAZZA brand? It is sold at several roast levels, so there is probably some variation.
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Caffeine vs Nicotine addiction [closed]

We, who love coffee very much, have a belief that coffee(which has caffeine) is better than cigarette or any other products which has nicotine. But as far as I know caffeine isn't so good for the body ...
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7 votes
1 answer
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How does a snack with a coffee slow down the caffeine's effect?

I have stumbled upon the following sentence: Have your coffee with a snack to allow a slower release of caffeine into your system. Browsing the internet I could see exactly the same claims, not only ...
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Does ground coffee lose caffeine like it loses aroma?

What I know is that, for the best taste, one should grind the coffee right before brewing it. Storing ground coffee makes it lose part of its taste, even if there are ways to counteract that effect. ...
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How to decaffeinate coffee? [duplicate]

I was wondering how coffee is being decaffeinated. How is this achieved? Are there different approaches? Since when is this practice?
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Recommended time to finish a cup of coffee for the best caffeine surge?

Is there such thing as a recommended time lapse in which to finish drinking a cup of coffee, in which you get the best kick out of the caffeine?
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6 votes
5 answers
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Why do I feel lousy, low, out of energy after the high coffee gives?

I started drinking a lot of coffee after coming to college. I became instantly energized and social after grabbing a cup or two. But then at night I became extremely dull, unsocial-able, and quite ...
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Can I have this type of coffee?

I would like to know if people normally have the type of coffee I do. I take coffee from a vending machine that has a variety of options (latte, cappuccino, espresso) of which I choose espresso. This ...
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1 vote
3 answers
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Does coffee consumption cause continuous chest pain? [closed]

I drink coffee twice a day for almost a month. Lately, for last few week, I feel chest pain right after drinking coffee. I initially thought that was some gastric related problem. But even after ...
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7 votes
6 answers
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Why does French press not give enough 'Caffeine Effect'?

I've been drinking drip coffee for several years. It's been perfect for me. It tastes good and most importantly it makes me awake. Recently I started drinking french press coffee and there is ...
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8 votes
1 answer
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How are caffeine pills made?

I tried googling but nothing on the manufacturing, only dosage FAQs etc. The question is: how are caffeine pills made, are they produced using synthesized caffeine, how much of a chemistry is ...
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Which Starbucks coffee have the least amount of caffeine?

I like coffee, my mom likes coffee, my dad likes coffee, and we all love Starbucks. My question is, which coffe has the least ammount of caffeine? I want to try to get one for my little sister :) (...
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9 votes
5 answers
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How long should I stir French press before "pressing"?

What are the pros/cons and effects of stirring, either "too much" or "too short", in a French press? My rule of thumb for steeping is to let the coffee cool down to a drinkable temperature, then ...
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6 votes
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Effect of Sugar on Perceived Bitterness in Coffee

Abstract: Food and Function Sugar changes the chemical structure of tea and coffee Is this effect of sugar in water on coffee solids to be trusted? I like some coffees black (pourover, drip) and ...
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