Questions tagged [caffeine]

A crystalline compound that is found esp. in tea and coffee plants and is a stimulant of the central nervous system.

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1answer
100 views

Is Moderated Caffeine Good? (if so how much and how often)

I have never engaged in caffeine except in rare circumstance where I take Excedrin due to a headache/migraine. However, after reading about the enhanced mental state from caffeine and trying a cup of ...
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2answers
51k views

Why do I feel shaky after only a small amount of caffeine?

I like coffee, but caffeine seems to 'wire' me much more extremely than most other people. I feel energized or even shaky after less than half a normal cup, and a whole 8 ounces will usually cause me ...
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1answer
334 views

What effect does long-term caffeine use have on memory?

I've seen plenty of references to the same study of how caffeine benefits memory after one day of use (1) (2) (3), but what about long-term use? There are all sort of factors to long-term use such as ...
13
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1answer
7k views

Does decaffeinated coffee inhibit iron intake as much as normal coffee does?

Apparently, coffee consumption can inhibit iron intake and in some cases is even linked to iron deficiency anemia, as Wikipedia says. It is unclear to me, however, how this happens. On the page about ...
7
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1answer
4k views

Can caffeinated shampoo have a noticeable effect?

I recently picked up some new shampoo and didn't notice that it included caffeine. I'm curious if this is just a marketing gimmick. Does having a small concentration of caffeine on my scalp for 30-60 ...
6
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2answers
2k views

How much space should be in between taking an antidepressant and drinking coffee?

For stimulants such as Methylphenidate and coffee, it is at least an hour, so I read: Stimulant + Stimulant = Stimulated. Don't take your Concerta with coffee in future. Space them out at least ...
3
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1answer
828 views

Mechanism of action (MOA) of Caffeine

Most people get a temporary increase in wakefulness or better ability to concentrate after caffeine intake. There are several known mechanisms of action to explain the effects of caffeine. The ...
3
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1answer
99 views

Which is better for health tea, water tea or milk tea? [closed]

From which of the following is better for health : tea with milk or tea with milk and water in equal proportions and spices or tea in water with spices, If someone can link to some authentic source ...
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1answer
28 views

Does chronic caffeine use increase or decrease blood flow to connective tissue?

In the short term, the effects of caffeine are well studied both as a vasodilator and vasoconstrictor, but given that chronic use produces specific adaptations, is the long term effect of caffeine use ...