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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54
votes
7answers
96k views

How can I figure out how much caffeine is in my cup?

I haven't been able to find a good way to approximate the amount of caffeine in the coffee I make. Googling yields information like this Mayo Clinic article that mixes serving sizes and brewing ...
16
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3answers
941 views

What type of roast has the lowest caffeine content?

I'm aiming to reduce my caffeine intake, but don't want to drop coffee altogether. What roasts / beans release the least amount of caffeine into my body when drank?
16
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2answers
62k views

How much caffeine is in an espresso shot?

Many people seem to think that a 0.85oz shot of espresso has the same amount of caffeine as a cup of coffee. Is there any validity to this?
15
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9answers
2k views

How can I stay off coffee after I quit?

I have quit drinking coffee many times, and it was never that difficult for me to do, but can never stay quit for more than about 3 or 4 weeks. I typically drink 3, homebrewed cups a day, and only ...
13
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3answers
365 views

Is coffee really useful for alcohol hangovers

When people experience a hangover due to too much alcohol intake the hours before, sometimes they are offered a good cup of coffee (at least in my country), not as the only or the main "treatment", ...
13
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3answers
5k views

What is the optimal brewing technique for extracting caffeine?

I was wondering what process, or processes, would yield the highest caffeine quantity at a fixed drink size (Say 200ml). Assuming the same variety of bean, same roast, same quantity, same water ...
12
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4answers
9k views

Is there more caffeine with an AeroPress?

I like everything about the AeroPress; however, I noticed that I exhibited symptoms which I usually only have when I've consumed too much caffeine. So instead of using two scoops during preparation ...
12
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4answers
1k views

Will I be addicted to caffeine?

If I drink coffee everyday, will I be addicted to it, or is it just a myth? Is there any risk to my own health due to caffeine?
11
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3answers
43k views

Which of these espresso variant contain more caffeine?

Can you please explain what is the difference between these types of coffee and which one of them contains more caffeine then the others: American Espresso Lungo Ristretto And please if it's ...
11
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3answers
2k views

What preparation method yields the most caffeine?

I want to make the most caffeinated coffee possible. What method should I use to yield the most caffeine content per liter?
11
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2answers
2k views

Coffee in a flask - How long can I store?

In the past I have made up to 2L of coffee using a french press and stored it in a flask that I have brought to lectures. Sometimes I will continue drinking this after 5 days, but it tastes pretty bad....
11
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2answers
1k views

Is coffee a pro-oxidant or an antioxidant?

I've heard that coffee acts as a pro-oxidant which damages cells and tissues causing the long-term effect of shorting life expectancy (Free-radical theory of aging), the opposite of how antioxidants ...
10
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2answers
2k views

How to weaken effects of caffeine after consumption

Yesterday I had a way too big, way too strong cup of 100% Robusta. I had never tried pure Robusta before, so I had no idea what I was getting into. I experienced strong caffeine effects 6+ hours after ...
9
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3answers
1k views

Is there a “caffeine metabolism curve”, understood by general public?

I've long been interested in how long caffeine stays in my body and what are the effects at different concentrations and times. For example, a popular site erowid has metabolism curves for most ...
9
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2answers
7k views

Roughly how much caffeine am I ingesting when I eat chocolate coffee beans?

I love a bag of chocolate coated coffee beans, but I do tend to eat them much like any other sweets (read: in large quantities with little to no restraint). Whole bags within arms' reach will vanish. ...
9
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2answers
731 views

Why is coffee comforting

I find drinking coffee relaxes me. Given that caffeine is a stimulant, I would expect it to do the opposite. Why? is it psychological? does it have something to do with it being a hot beverage? is it ...
9
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1answer
547 views

How much caffeine is lost after 24 hours?

Suppose I brew a 16 oz cup of coffee, take just one generous sip (one ounce), and then put the rest in the fridge. Just how "stale" is my coffee, when I revisit it 24 hours later?
9
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1answer
525 views

Why does coffee heal headaches in some people but causes it in others?

I know that it could be related to the effects of caffeine with blood pressure, but I don't know if there are any other side effects of caffeine itself or from the other chemical components inside a ...
9
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1answer
2k views

How to increase your caffeine sensitivity?

I have been drinking coffee for a long time and over the last few years I've noticed that my sensitivity to caffeine has dropped significantly. Nowadays, it basically has no effect whatsoever - I can ...
9
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2answers
2k views

How many cups of coffee is it safe to consume per day?

This question is in two parts: How many cups of coffee can one safely consume each day before first experiencing side-effects? and How many cups can one consume before it's considered harmful to one'...
8
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7answers
2k views

How can I maximize the time the “high” lasts?

I know it's individual, but in general (or at least, in average): What are the main factors in how long does a coffee's "high" last? Can I deliberately make it last more than an hour? More than 3? I ...
8
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4answers
4k views

What are the side effects of drinking too much coffee?

Are there any side effects when you drink too much strong coffee? Is it dangerous? In example, if I drink the world's most expensive Starbucks coffee (costing $55/£33) featuring 60 espresso shots at ...
8
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2answers
284 views

Is it okay to compost used grounds?

Given that coffee evolved caffeine as a way of poisoning predators, are (caffeinated) used grounds suitable for composting? Apparently caffeine deters some bacteria and funghi which could affect the ...
8
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1answer
376 views

Does eating a cookie created using coffee beans has the same effect as drinking coffee?

There are some cookie recipes using coffee beans. I've never tried any of them. But I am curious, if eating a cookie has the same effect as drinking coffee? Or is all of the caffeine lost during the ...
7
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2answers
378 views

Does a decaffeinated coffee have zero or little caffeine in it?

Does any average kind of decaffeinated coffee have zero or very little caffeine in it?
7
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6answers
11k views

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 ...
7
votes
3answers
346 views

Student friendly coffee?

What type of coffee would you good people recommend as a quick and easy caffeine dose for staying alert? (specifically this, although I am fond of the taste too as a secondary factor!) I am currently ...
7
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2answers
186 views

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 ...
7
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1answer
720 views

Does caffeinating my hair follicles help prevent hair loss? [closed]

In the UK there is a product being very heavily marketed at the moment: Caffeine Shampoo. From their copy: This Caffeine Shampoo contains caffeine that can help to stimulate hair growth directly ...
7
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1answer
549 views

Does caffeine raise cholesterol (good or bad)?

I've heard that coffee can raise your cholesterol. If that's true, is it a bad thing? Is regular or acute exposure to coffee dangerous in this way?
7
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1answer
2k views

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 ...
7
votes
1answer
486 views

Does making Bali Coffee change the amount of caffeine compared to filter coffee?

Bali coffee is made by tossing finely ground coffee directly in the water (no filters, etc.). Does this change the amount of caffeine in the coffee, compared to coffee from a filter machine? (Coffee ...
7
votes
1answer
781 views

Does coffee affect people from all races the same?

I strongly assume that, if the looks from people all over the world vary, then also there metabolic system should vary and wonder, if there are noticeable differences how caffeine affects people from ...
7
votes
1answer
176 views

Does coffee really reduce the risk of Alzheimer's?

Many medical websites suggest so. If yes, then how? Alzheimer's is primarily incurable but then it can be delayed, how can coffee play a role? References: Pubmed - Caffeine as a protective factor in ...
7
votes
1answer
496 views

How many milligrams of caffeine are in a fresh coffee bean?

how much caffeine in a raw coffee bean? As in, raw, freshly picked, just remove hard outer shell and eat the rest.
6
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4answers
913 views

Should coffee be regulated?

A couple of questions/answers on this site make it clear that many people feel that coffee is addictive, at least for some fraction of consumers. My question, for those who believe coffee is ...
6
votes
3answers
901 views

Will the quality of the coffee change if I store it in a plastic bottle?

I make my coffee every morning. I leave it to rest for 20-30 minutes, mix it with some milk, and pour it into a plastic bottle. I drink the coffee from that bottle during the day. Am I doing it right?...
6
votes
1answer
5k views

Can caffeine be extracted by the body when digesting coffee grounds?

I'm told my great-grandmother used to drink the coffee, then eat the grounds with some sugar. Assuming there was caffeine left in them, is the body able to extract caffeine from coffee grounds by ...
6
votes
1answer
87 views

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?
6
votes
1answer
5k views

How long does it take to reset caffeine tolerance

I've read on different websites, mainly fitness related, about cycling a pre-workout due to a build up of caffeine tolerance. The suggestions generally range in 1-2 weeks, but I think this would be a ...
6
votes
2answers
473 views

Will I develop a caffeine dependency by skipping 2 days?

A couple of months a ago I broke my daily caffeine habit because I disliked waking up every morning already "needing" caffeine. But, I LOVE coffee and I LOVE the buzz caffeine provides. So, for the ...
6
votes
1answer
102 views

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 ...
5
votes
5answers
422 views

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 ...
5
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3answers
5k views

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 ...
5
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1answer
1k views

Instant coffee has less caffeine than percolated and filter drip?

Sources related to average caffeine content per preparation method show: for (6oz cup, arabica coffee) Filter drip 150 [Mg. of Caffeine] Percolated 125 Espresso 100 Instant 60 Decaffeinated 4 ...
5
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2answers
334 views

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 ...
5
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1answer
571 views

Why does coffee lose caffeine as it is roasted?

I have heard that coffee actually loses caffeine as you roast it, which means darker blends have less caffeine. Why is this?
5
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1answer
151 views

Coffee and blood pressure

Several times one hears that drinking too much coffee produces an increase in blood pressure, that may be dangerous with people with cardiovascular diseases. Is it caffeine the only chemical to blame ...
4
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1answer
747 views

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. ...
4
votes
2answers
551 views

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 :) (...