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Questions tagged [caffeine]

A widely consumed xanthine alkaloid first isolated by Friedlieb Ferdinand Runge in 1820, which functions as a psychoactive stimulant. Caffeine is typically found in sodas, teas, and coffees, as well as a wide variety of other sources.

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27 votes
2 answers

Does tea contain as much (or more) caffeine as coffee?

This question arose from my personal experience — after quitting coffee, I switched to drinking tea (a lot of tea). One day there was no tea, and I had a terrible headache, similar to the first days ...
17 votes
1 answer

Does caffeine increase productivity in office jobs?

There is a common conception amongst coffee drinkers (including myself) that drinking coffee increases productivity in office jobs. Is this true? Have there been any definitive studies which link ...
2 votes
1 answer

Does coffee cause fat and cellulite gain?

The Humans are Free article The Coffee Deception: 13 Little Known Facts About Coffee Coffee causes fat gain and cellulite because by triggering the body's flight or fight system. 11. Coffee causes ...
6 votes
1 answer

Does the coffee plant use caffeine to kill bugs and surrounding plants?

The HUmans are Free article The Coffee Deception: 13 Little Known Facts About Coffee makes the claim that caffeine in the plant is used to kill bugs and surrounding plants. 1. Caffeine is an ...
6 votes
1 answer

Does drinking coffee reduce breast size?

A study of 300 women done in the UK says that drinking 3 cups of coffee per day can cause a woman's breasts to shrink by an average of 17%. drinking three or more cups a day was enough to cause a ...
4 votes
0 answers

Does caffeine from cold brew coffee get absorbed slower than normal coffee?

A person who was selling cold brew coffee claimed that it the body absorbed the caffeine from cold brew coffee slower than it does from hot pressed coffee such as an espresso. Is there any ...
11 votes
1 answer

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 ...
9 votes
1 answer

Does chocolate have caffeine?

Chocolate doesn't have caffeine according to this Snopes thread. Wikipedia stated that chocolate has it: [Cocoa solids] also contain alkaloids such as theobromine, phenethylamine and caffeine. ...
7 votes
2 answers

Is there a conspiracy to prevent testing of the actual caffeine content of energy drinks in the United States?

Someone I know has been talking about how there is a huge factory in China that supplies the US with a significant fraction of its annual caffeine import, and that supposedly no one is allowed to ...
10 votes
2 answers

Does Red Bull contain as much energy as 10 coffees?

You often hear people saying Red Bull contains a lot more energy than an ordinary coffee. Specifically I heard mention a few times that Red Bull contains 10 times the amount of energy than an ordinary ...
6 votes
1 answer

Is there a correlation between coffee (or caffeine) and auditory hallucinations?

The news is full of claims today that 5 cups of coffee a day is enough to cause auditory hallucination. Professor Simon Crowe, of La Trobe University in Melbourne... ‘The combination of caffeine ...
9 votes
1 answer

Is decaffeinated coffee bad for health?

Apparently, some decaffeination processes (the "direct method", for example) use solvents or other chemicals that don't sound very healthy (dichloromethane "is the least toxic of the simple ...
20 votes
3 answers

Does caffeine later in the day affect quality of sleep?

My wife is often telling me that drinking coffee later in the day will lower my "quality of sleep." Is this so? For an example of a bit beefier of a source for this claim, consider THIS blog post, ...