The liquids I and everyone else consumes can be placed in two classes: pure water and everything else.
When I'm not drinking pure water, my drink of choice is usually coffee, of which I drink about 3 cups a day.
Now let's think of the alternative non water drinks out there... Many of them are sodas which have obscenely high sugar levels, just like most drinks that aren't pure water.
Someone who doesn't drink coffee may have more of these sugar containing drinks when they're not drinking pure water, inundating their bodies with harmful amounts of sugar.
So the benefits we see from high levels of coffee consumption come not from the coffee itself but from a substitution effect of replacing unhealthy sugary drinks with coffee.
A good test for this would be to see if tea drinkers also experience health benefits similar to those seen in the study. If not then that may indicate that my theory is wrong.
If you live in an area with hard tap water you're essentially drinking "mineral water" out of the tap.
Here's some data for ya:
Mineral Content of Tap Water in Major North American Cities: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1495189/table/t...
Mineral Content of Selected Commercially Available North American Bottled Waters: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1495189/table/t...
I lived in Cambodia for a while, where tap-water is a no go for drinking, and even though we avoided buying plastic bottles (plastic is a huge problem particularly in S.E. Asia) and instead stuck to larger tanks of filtered water, we had to make a point of always having some bottled mineral water in the mix. It was quickly noticeable when you hadn't had enough (extremely tired, drowsy, etc.)
But I’ll be honest, I haven’t looked into it too thouroghly.
Yes, or drinks with artificial sweeteners.
"Dando's previous research had already found that when you chemically block people's ability to taste sweet flavors, it makes them crave more sugar and seek out higher-calorie treats. Based on his collective research, we now know that drinking a caffeinated cup of coffee, which has the same blocking effect, makes people want cookies or cake more than they otherwise would."
Caffeine seems to blocks the adenosine receptors, which makes us feel less sleepy, but these same receptors also play a part in helping us taste sweet flavors. While doing this, it pushes us to find more sweet, sugary tastes. This might be a part of why when drinking coffee especially, which is also pungent and bitter in taste, opposed to sweet, might drive us toward these sugary treats.
Also I feel coffee depletes our energy levels very fast, making us feel more tired when the effect comes down, making hte body want to replenish those energies quickly, and high in sugar ingredients do that fast, with a price though.
It's interesting why tea and mate for example don't have this effect so clearly, maybe it has to do with the bitternes of coffee and the way it is roasted, not sure.
I casually looked into that claim in the past and read that coffee is as strong a diuretic as pure water.
Here's the problem: the human body is an immensely complex system, with millions of factors influencing its status and well-being. Untangling these factors correctly and producing an accurate and sophisticated statistical theory of the body would require a comparably large number of parameters - on the order of millions or more.
Unfortunately, modern medical science relies on low-N observational or clinical trials, with N on the order of hundreds or thousands. In this radically low-data regime it is impossible to justify the use of complex models. If you try to use a complex model, you will just get overfitting. You can use a simple model to avoid overfitting, but there's no reason to believe that a simple model will produce a good approximation of the underlying dynamics.
In terms of caffeine studies, yes- there are definitely thousands of other foods and so-forth that effect the risk of heart disease, cancer, and whatever else they're looking at. There's even things which interact with caffeine specifically to modulate or plausibly even reverse it's effects. All of these things work in egregiously complicated ways. But when I read the study and try to think what it tells me about my own situation, this doesn't matter since I can usually assume that my own exposure to these other factors will be typical compared to that of the study population- thus, I'll tend to respond similarly to caffeine as they did.
This approach is obviously has an abundance of limitations- it only tells me how I'm more likely to respond to caffeine or whatever else, but doesn't give any guarantees. And for someone who is different than the study population- a black woman living in Uganda versus a study done on white male freshmen at Yale, say- the results rapidly become less meaningful. But they do work.
Even if a model actually succeeds in properly balancing the controls so that as well as controlling for basic demographics it also ensures its non coffee drinkers don't drink a commensurately larger portion of other caffeinated drinks or unhealthy alternative drinks or substitute for the caffeine hit with stronger drugs, and don't have a health reason for cutting caffeine or a cultural/social reason linked to other behaviours or diets, you've then got the problem that people with different genes and physical health likely metabolise coffee in very different ways, and to recommend more or less coffee to a particular individual, you've probably got to untangle all that too...
When you think about the air you breathe, to the variety of things you ate (plus the additional microbiomes that inhabit the food, your skin, your gut, etc) it seems like we are just barely really understanding what the intakes to the body are.
Edit: here's a great point to start to think about it: https://youtu.be/bYOIhmZ0Osg?t=41m49s -watch for 10m
Regardless of that, and assuming that there are major health benefits to circumcision, the Jewish and Muslim communities that practiced it for millennia, couldn't possibly have been aware of any. Because they didn't perform any epidemiological studies measuring rates of penile cancer and HIV infections. But they must have noticed a lot of babies and boys getting fevers and dying from infections shortly after the procedure was performed on them. Clearly, the rite lived on because "God told them to" despite the adversarial effects it had on their children's health.
And I'm not especially impressed by that article you linked, either. Several of the sources it cites in support of its arguments, when examined, turn out to be tangentially related at best, and not at all supportive of the claims to which they're linked.
It’s my opinion that circumcision acceptance is based on a cultural/ideological blind spot.
Now, I am free from coffee addiction and happy as I have ever been. No way in hell is that stuff good for you.
Read Caffeine Blues, it will wake you up for real.
But then you sleep 5 hours on sunday, and monday we are happy again on the coffee train.
It took almost a year before my cravings went away but after I never felt so good.
Another anecdote: having even a little bourbon makes me feel completely terrible, however I feel fine after drinking any other spirit. It's just my bodies adverse reaction to some chemical component. Perhaps similar with you and coffee.
There were periods when there was really good tea at the office, and I would drink that, or mineral water.
Anyhow, believe you but can't relate as I and many others don't have issues with coffee drinking.
More than a thousand chemical compounds in coffee, area of active research. Does this imply that we don't know much about coffee yet?
And more anecdotally, what I find weird is that when I switch from coffee drinking to tea and soft drinks, there seems to be no amount of caffeine intake that make the withdrawal symptoms go away. For me, there certainly is something in coffee besides caffeine that hooks me.
Strangely enough, if you find yourself in this situation of having drank coffee too late in the day nicotine has actually been proven to speed up the metabolization of caffeine: https://www.ncbi.nlm.nih.gov/pubmed/3365914
At 70 something my dad watched a TV show on ADD and said to my stepmom, I think I have ADD. He want to the doctor and told him the same. The doctor said, we don't test for ADD, instead we have assessment questions. He asked my dad, first question "How many cups of coffee do you normally drink?" Dad said 15 to 18 a day. Doctor said we are done. You have ADD.
He was on ritalin the rest of his life. I don't agree with having him on ritalin but that was not my choice. He died of old age at 83. Until a year before his death he had been very healthy. NEver got colds, the flu or anything like that. Had a little spring hay fever. That was all.
I wonder if the metabolization benefits of nicotine actually made coffee more enjoyable on a physiological level.
That said, I don't think it's as genetically hard-coded as the the root comment suggested.
I've been through episodes (coinciding with when I was having debilitating symptoms of chronic fatigue and depression), when I experienced these symptoms (sometimes very severely) when consuming caffeine. As I've become more physically energized and mentally well, my tolerance for caffeine has vastly improved.
if you want to know more about caffeine in general this place sites all the studies:
Other caffeinated drinks (eg sodas) are either sweetened (sugar or HFCS or have artificial sweeteners.
So about a month ago I decided I was drinking too much caffeine. I'm talking 600-700mg a day. I should also point out that my variance with and without caffeine is pretty low. In college for example I tried once to take caffeine pills to stay awake to cram. Not sure how much I took but it was enough that my hands were shaking. I still fell asleep just fine. Some people really do seem a whole lot more sensitive to this than I am.
Anyway, my reason wasn't coffee in particular but sugar. For years I've drunk artificial sweetener sodas and ignoring any other possible side effects I think the big problem is that they still taste sweet so it seems like they still feed the craving loop for sugar without containing any sugar.
It's early days yet but I think I can already notice some difference. Like I had ice cream tonight that I've had many times before and it tasted too sweet.
Anyway I think it's impossible to talk about caffeine consumption without also considering sugar consumption because they really do go hand in hand.
Caffeine is a stimulant and seems like it can be used to enhance some activities including athletic ones .
Not for everyone - there are people who drink coffee black with no sugar (especially espresso drinkers).
One study found a slight increase in acid reflux when drank on an empty stomach, a problem I don't have, other than that there does not seem to be any associations with gastritis, ulcers, or dyspepsia.
I prefer my coffee black, so that makes starbucks worse than most fast-food coffees flavour-wise (though I still enjoy Starbucks locations and amenities better :D)
I think your ice cream experience might have an entirely different cause - you were used to stimulation from particular flavors, so when you quit consuming sweet food/drinks. your perception of ice cream was like a bombshell for your tastebuds.
Now, it's entirely possible that artificial sweeteners have detrimental effects on your gut biome or causes a reward response, which create cravings but I'm skeptical until more literature is published on the subject.
At best, this refers to a standardized 250 ml or 8 oz measuring cup (unfortunately, still rarely what "a cup of coffee" generally means to those who read these headlines and adjust behaviour as a result).
At worst, the term is used to allow for ambiguity and variance expected in self-reporting.
I recognize there are many other variables that are even harder to measure than beverage volume, like mg of caffeine or diterpenes or antioxidants. But "cups" just seems so loose.
Related question: Is there a somewhat accurate amateur method of measuring caffeine content? I vary my beans and roasts and method a fair bit for fun and taste. e.g. various beans, light vs medium vs dark roasts, varying apparatus, mass of beans per "cup", filter types, and brewing time. I would like to have insight into how much caffeine I'm consuming.
250ml is 8.5 ounces. Some places in Europe standardized on this.
A cup of anything else is 8 ounces.
A "cup of coffee" (the actual unit) is 6 ounces, and this is the standard everywhere where 250ml isn't, and we're not in Japan; but even though the US follows the 6 ounce standard, the USDA considers a cup 8 ounces on their nutrition table.
Japan has standardized on 200ml (or about 6.7 oz).
What SHOULD be measured is not liquid volume, but bean weight (measured in grams; even Ameicans measure it in grams when they're the type to weigh it instead of just throwing ambiguously heaped tablespoons in); and then shifted according to that blend's particular caffeine content (outside of specialty products with high-caffeine bean variants, caffeine content can vary about +/- 50% depending on the origin of the beans (roasting does not effect caffeine content meaningfully, although the myth lives on)).
* edit - maybe it's just an app where you like 'Facebook' all your medical history, and post daily diets, health issues like headaches, acne, etc...
All the data is public and accessible by anyone to trend. There would be no usernames though, everyone just has a guid and all the guids can find people like themselves and chat with anonymity.
Some people like me are very sensitive to caffeine. I wonder if we the jittery ones process caffeine slower and could that be a disadvantage.
Acrylamide due to roasting isn't a great thing either.
Hot liquid ingested every day may be a risk for throat cancer.
For me, I have to be careful drinking coffee because I have GERD if I drink too much coffee my throat spasms and at night I cough up stomach acid while asleep. It gets into my lungs and over time damages lung tissue.
Even for coffee roasters, the people near the coffee are at risk of lung damage from whatever roasting coffee emits. https://www.jsonline.com/story/news/investigations/2017/09/2...
The American Cancer Society is extremely misleading and biased in their opinions imho.
They basically support whoever pays them to.
They actually suggest that you eat meat on their "healthy eating recipes" page for example. 
I don't know a ton about nutrition and cancer... but I do know that eating meat is not suggested by most nutritionists who understand those subjects better than I.
During those months, I experienced anxiety attacks for the first time in my life. I did not realize at first that long term (for me, 3 months) coffee consumption slowly helped drive myself towards constantly doing more than I realistically had the energy to do, somehow triggering these very anxietic episodes couple of times, where I was feeling like I was in danger, it was hard to breath, and I was panicking, I really didn't know what was happening.
Later I realized coffee did this. There are studies of coffee putting the body into a state of fight-or-flee constantly, rising the heart rate and making people very jumpy, so that might explain why this happened.
Also, I've been noticing that drinking coffee tends to over focus my focus on one task and not see to whole picture, so it is very easy to go in one direction too far with a project for example, and just start fine tuning whatever little details come at me, when more better would be to see the big picture again and change directions.
I can hardly see how coffee is a good thing on a global scale, except for the work force who want to do stuff that is not otherwise interesting.
If you'd drink one week a month decaf (assuming you can enjoy the taste. I dislike it) you get caffeine withdrawal the first day, and the other days you don't. But as soon as you start consuming coffee again, you also get withdrawal symptoms because the half time is ~4 hours.
The way I deal with it which is the correct way is limit coffee intake to 2-3 cups a day in the morning/afternoon. None in the evening because it will cause sleep deprivation.
Add in the caffeine withdrawal afterwards, and I've decided that it's best to just avoid caffeine altogether. Overall, I feel like I have more energy now... but it does require being more careful about getting enough sleep.
I have to be careful with caffeine personally because I haven't needed to have it for the last few months, so when I do have it, it usually seriously upsets my (unbounded) sleep cycle if I don't take care to go to sleep at a regimented hour.
Also: sugar masks the flavor. Good coffee tastes best with just cream.
In the kitchen I have a joke with the guy from accounts as well as have a really positive buy-in for the new 'aggregated accounts' plan. I have some chat with the cleaning lady, she smiles, I smile. Someone else gets doors for me, I say please and thank-you. Finally beverages get served by me to my colleagues. Everyone is happy.
On the way to and from the kitchen I have got the blood circulating, not a very big walk, certainly not a gym workout, but all moving is good in the sedentary office world. Yes, it does take a lot of muscles to smile, and just with the light convo needed to get to the kettle and sink I have had a little workout. Unlike press-ups I can put my heart into a smile.
So what happens if I am in a mood and can't be bothered to make tea for the rest of the team? I sneak into the kitchen and make a coffee just for myself. Or if it is the weekend and I am home alone, with no interaction with people during the consumption of coffee.
On aggregate I do make coffee and it be a social thing rather than a loner thing. We are social animals and the act of sharing coffee is probably better for our well being than whatever is in the coffee. I don't think it is possible to do studies without the bigger social picture.
So could claims that 'coffee is good for you' stack up, even with the above?
In my anecdata there is also the girl I sit next to that is not in the 'tea round system'. She makes her own drink, and will tend to have a jogger style water bottle at hand at all times. She will also make her own infusions - ginger tea etc, but not a round for everybody. Because she just serves herself then she is not in the kitchen for as long as me, not needing to converse to complete the task (no tray). Furthermore, she does not get to greet everyone in the team, or to have that special thought for them, e.g. mug colour preference, tea/coffee strength etc.
So, anecdata, but, if coffee and the sharing of coffee is important, then the claims that 'coffee is good for you' could stack up but it not be causation/correlation on the caffeine, even if that appears to be the case.
The relative risk vs coffee consumption curve fist goes below 1.0 (no coffee = 1.0) and reaches minimum around 3-5 cups then starts to increase slowly again. cardiovascular disease and stroke risk go above 1.0 after 9-10 cups per day.
The study mentions that results may not apply to unfiltered coffee (eg, French press, Scandinavian boiled, or Turkish/Greek coffee). Other studies have shown that cholesterol-raising factor in coffee does not pass a paper filter.
NOTE: Cholesterol increasing effect in coffee is not from dietary cholesterol.
It comes from cafestol and kahweol (diterpenes). They seem to have adverse effect to cholesterol regulation in the body, http://www.annualreviews.org/doi/10.1146/annurev.nutr.17.1.3...
Magnesium replenishment also helps, esp. with >2 cups of coffee / day.
Just for more info, I've been experimenting with 200 mg of L-theanine combined with one cup of coffee. Not something I would take in long periods, but definitely useful for those stints where you just have to get something done and need the stimulants.
L-theanine is good also for relaxation alone, and calming the nerves down, I sometimes take it by itself if I feel too anxious also.
But after all, that calming effect has to come from somewhere with L-theanine.
All I know is it tastes fucking delicious, it makes me feel good, and we've been drinking it for generations. If I die earlier because of it, then so be it. At least I'll have had an enjoyable coffee-drinking life.
On the other hand if coffee drinking causes strokes you could live for years with severe impairment.
I don't think I've ever heard of a person in old age lamenting, "If only I hadn't enjoyed coffee so much!"
Cigarettes on the other hand...the effects of those are a lot more clear-cut.
Disclaimer: I consume ~4 cups of coffee per day between 8am and 3pm and get ~8 hours of sleep per night.