Skeptics Stack Exchange
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Questions tagged [coffee]

A widely popular, often caffeinated, drink brewed from roasted beans of the coffee plant. There are a wide variety of coffees available worldwide.

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Does a small cup of coffee result in a 45% reduced blood flow to the brain?

The Humans are Free article The Coffee Deception: 13 Little Known Facts About Coffee makes the claim that caffeine from a cup of coffee reduces blood flow to the brain. 2. MRI images taken before and after 1 cup of coffee showed a decrease in…
user1605665
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Will disposing of coffee grounds in the sink cause drain blockage?

My wife firmly believes coffee grounds must not be disposed of down the sink drain because they will cause a blockage in the waste pipes. She has it from family and from accounts on the world-wide web. I am suspicious that this is an urban myth.…
MetaEd
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Does drinking coffee improve concentration?

Will drinking a cup of coffee before I sit down to work improve my concentration, compared to drinking a cup of water?
fredley
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Is drinking reheated coffee dangerous?

Someone once told me that reheating cold coffee releases poisonous chemicals in the coffee which makes it taste bad. Browsing the internet I can't find any conclusive results. Some say it tastes bad, others that it causes high blood pressure and yet…
Carra
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Does storing ground coffee in the fridge preserve its flavor better?

I'm Italian and, as you know, we make a big deal out of coffee. I found some people to be very much convinced that ground coffee preserves its taste better when stored in the fridge. On the other hand, there's a whole lot of other people claiming…
Gabriele Petronella
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Does burr-ground coffee taste different than blade-ground coffee?

There are two types of mechanical grinders for coffee: blade and burr. Blade grinders spin at high speed, chopping the beans into grounds, while burr grinders move the beans between burrs, which crush them. The claim is that burr grinders produce a…
Larry OBrien
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Does coffee cause children to grow slower?

One of the things claimed by several adults when I was little is that coffee would stop me from growing so I wasn't allowed to drink it, is there any truth to that claim? It doesn't seem completely out of order that it could have some negative…
Kit Sunde
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Can a single cup of coffee help a person to wake up and be more focused?

There are many examples of people claiming they need their morning cup of coffee in order to be able to function at their normal level: NIC blog: Like many early morning risers, I need my morning cup of coffee to get my brain going. Read This…
Sonny Ordell
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Is Coffee the most traded commodity in the world after Oil?

I have heard the claim that Coffee is the most traded commodity in the world right after Oil. Is there any proof of that? I have also heard that coffee is the most consumed beverage after water? Any proof of that claim?
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Is coffee anti-cancerous?

http://www.energyfiend.com/caffeinated-coffee-the-anti-cancer-wonder-drug The above URL claims: Study after study has been showing the cancer fighting properties of coffee because of the rich antioxidants it contains. I've seen this in various…
berry120
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Does adding milk or cream in the coffee help reduce teeth stain?

I drink black coffee. In a coffee machine discussion long ago, someone said that he was also drinking it black, but he started adding milk to his coffee since his dentist told him that it's help prevent teeth stain. This claim seems to have been…
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Does drinking coffee or tea dehydrate you?

It is widely claimed that despite being made mostly of water, drinking coffee or tea will actually dehydrate you, because the caffeine is a a diuretic. Here is an example from the SFGate news site The diuretic effect of caffeine increases your…
Yosi Dahari
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Are there high levels of dioxin in Vietnamese coffee?

First heard this claim on TV (yeah, I know, right). Here's a follow-up I came across online: Agent Orange In Vietnamese Coffee I was sent an interesting article the other day that claimed that there was still a substantial amount of dioxin in the…
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Are apples better than coffee to wake up?

As you can see in this google request answers, it is often said that eating an apple will wake you up better than coffee. Really? Are there scientific proof about this? (I mean not only assumptions based on fruit composition) Or is it a…
Klaim
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Can coffee grounds clean pipes when disposed in the sink?

I regularly have heard/read the claim that flushing coffee grounds in the sink can 'clean pipes' and/or 'scrape dirt from the pipes' and so on. (Note this is almost the opposite of the claim this question) Is there any truth in this or is it just an…
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