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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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 ...
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 ...
7
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1answer
785 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 ...
12
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4answers
10k 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 ...
9
votes
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 ...
13
votes
3answers
366 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", ...
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 ...
6
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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 ...
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 ...
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 ...
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 ...
7
votes
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 ...
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 ...
4
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1answer
1k views

Why does some coffee “hit me” harder than other coffee? [closed]

I've had all types of coffee, but certain brands or preparations seem to get me more 'speeded up' (like Starbucks coffee) than others. What causes certain coffee to be more "stimulating" than other ...
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 ...
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 ...
-1
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2answers
112 views

What are substitutes of caffeine? [closed]

Are there any substitutes of caffeine? In terms of similar effects such as energy, alertness, decreased fatigue, increased metabolic rate, etc.?
7
votes
1answer
551 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
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 ...
8
votes
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 ...
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....
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. ...
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
votes
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'...
7
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2answers
379 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?
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?
16
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2answers
63k 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?
54
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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
votes
3answers
945 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?