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Habitual coffee intake shapes the microbiome, modifies physiology and cognition

nature.com

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Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#71
post #41

Earlier quoted context omitted.

It does not sound like an outcome that big coffee paid for it to be so: Behaviourally, coffee drinkers exhibited greater impulsivity and emotional reactivity, whereas non-coffee drinkers demonstrated better memory performance.

Do they though? Any data on that? Also, the highly caffeinated people might also be sleep deprived, which impacts memory and emotional regulation

[deleted]

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#72
post #41

Earlier quoted context omitted.

It does not sound like an outcome that big coffee paid for it to be so: Behaviourally, coffee drinkers exhibited greater impulsivity and emotional reactivity, whereas non-coffee drinkers demonstrated better memory performance.

Do they though? Any data on that? Also, the highly caffeinated people might also be sleep deprived, which impacts memory and emotional regulation

Please delete this comment. It’s embarrassing

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#73

Earlier quoted context omitted.

all tea has caffeine unless it's decaf. some things that aren't tea are called tea casually, but they aren't tea, for instance peppermint "tea" is not tea. by the same logic that one would call peppermint a tea, one would have to call coffee a tea. and beef broth.

That depends on culture. All camelia s. teas have it (green etc) but almost none of common herbal teas in Europe have it (chamomile, menta, sage etc.) They are not called casually teas.

> They are not called casually teas.

are you saying chamomile isn't called tea but it's one of the teas without caffeine? if so that's very confused.

camelia sinensis is tea. when i said that other things are casually called tea, i mean that what chamomile tea, for example, ought to be called is a tisane or an herbal infusion. casually, people might call it a tea; some people are so casual about it that they think it actually is tea. but it isn't.

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#75

Earlier quoted context omitted.

Notably, the article is looking at coffee, both caffeinated and decaffeinated. There is a lot more to coffee than just caffeine...

The overwhelming majority of the enjoyable coffee experiences are caffeinated. While there is good decaf out there it's not the norm, specially in smaller markets.

I think they meant that coffee contains a lot of other compounds than just caffeine, which something like energy drinks or teas will not include. So you can't necessarily extend conclusions from a study on consumption of coffee to effects that other drinks that happen to include caffeine might have.

Edit: this is especially relevant here, as the study found similar effects in decaffeinated coffee drinkers. So the effects they observed, if real, are not related to caffeine.

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#76
post #55

thirty-one participants were moderate coffee-drinkers (CD, i.e., people that usually consume between 3 to 5 cups of coffee per day). 3-5 is moderate? To me, 3 is already high. Also, sample size is pretty low and they're all Irish.

I do 6-10 espresso cups per day, so 3-5 does sound very moderate.

That’s not normal. It’s like saying “I drink 6-10 beers a day so 3-5 is very moderate”

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#77

After habitually consuming caffeine (not in coffee form) daily, usually multiple times a day, for more than a decade, a horrible mental health incident happened to me that forced me to stop it for a while. Afterwards I didn't resume the habit, and so I no longer have a tolerance. This has let me evaluate what caffeine does with fresh eyes, so to say, because I can now consume it occasionally while having many non-caf…

Quitting caffeine after decades of use was a bit of a mixed bag for me in the short term, but positive in the long term.

Going caffeine-free made it much easier to lose weight as I have far less cravings for high carbs and sugar now, presumably this is related to the impulsivity impact talked about in the paper.

Going caffeine-free also made me very depressed for a while with severe anhedonia, this lasted way longer (like 3-4 months) than one would generally expect for caffeine withdrawal symptoms.

I had seemingly become so used to the increased dopamine signaling while buzzed on caffeine that my brain was a mess for a rather extended period of time as it got used to not having it.

Overall I view quitting as a positive for me, but I'd warn anyone thinking about doing it to do it carefully and closely monitor their mental health. AFAIK the impacts of quitting can be quite different for different people, so my experience may differ than that of others, but I had no idea how much of a (temporary) mental health crash quitting caffeine could cause until I experienced it.

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#78
post #55

thirty-one participants were moderate coffee-drinkers (CD, i.e., people that usually consume between 3 to 5 cups of coffee per day). 3-5 is moderate? To me, 3 is already high. Also, sample size is pretty low and they're all Irish.

Are the Irish unique when it comes to metabolizing coffee?

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#79

After habitually consuming caffeine (not in coffee form) daily, usually multiple times a day, for more than a decade, a horrible mental health incident happened to me that forced me to stop it for a while. Afterwards I didn't resume the habit, and so I no longer have a tolerance. This has let me evaluate what caffeine does with fresh eyes, so to say, because I can now consume it occasionally while having many non-caf…

I do believe a lot of it boils down to tolerance. I for example feel basically 0 effects, and drink it just because I like the taste (of a good one with milk, or exceptionally some good espresso / ristretto after big dinner).

I recently traveled and didn't have coffee for more than a week. No change I could feel, no craving, nothing. But one of my ex-gf was quite sensitive on many things, had frequent headaches, low blood pressure and coffee was helping with those visibly. So YMMV.

Re: Habitual coffee intake shapes the microbiome, modifies physiology and cognition

#80

good thing I have claude to summarize this and quickly realized that sample size was small and nothing much new unless you are a microbiome researcher

If the effect size is big small sample sizes does not matter as much as otherwise.

You really have to look at the power analysis and the sample size together.

Saying this as a general truth. I am not sure about the power of the method in this papper, i only read the abstract.

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