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.

Filter by
Sorted by
Tagged with
7
votes
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 ...
4
votes
2answers
549 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 :) (...
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'...
5
votes
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 ...
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?...
2
votes
2answers
3k views

If I leave my brewed coffee to rest, will it lose caffeine? [duplicate]

I prefer to drink coffee cold. So, after the coffee is done brewing, I leave it to rest for some time and drink it later. Will the coffee lose its strength, if it is cooling down?
8
votes
1answer
375 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 ...
5
votes
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?
2
votes
0answers
40 views

The relationship between hair growth and caffeine ..? [duplicate]

Does caffeine really enhance hair growth and keep the hair healthy? was it proven?
6
votes
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 ...
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 ...
9
votes
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 ...
12
votes
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?
9
votes
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?
13
votes
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 ...
15
votes
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
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 ...
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 ...
5
votes
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 ...
5
votes
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
votes
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 ...
11
votes
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?
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
votes
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
votes
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 ...
-1
votes
2answers
111 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
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 ...
11
votes
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....
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 ...