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Not much in the article itself. Basic summary: * Getting to sleep on time more often and waking up in the mornings feeling rested * Don't need caffeine to start doing things (no zombie feel) * Less anxiety and easier to enter a focus session
I don't have any sleep issues as long as I stick to a simple rule: No caffeine after 15:00.
Some people are more sensitive than others but I’ve found no sleep issues from morning coffee, i just don’t have any after 10am roughly. If coffee is keeping you awake at night and then it doesn’t then obviously this is a benefit. I don’t think this would be “unexpected” for anyone.
Only slightly related, but I've found that traditionally brewed coffee and espresso give me a ton of anxiety. Tea, energy drinks, and even cold brew don't give me nearly the same level of anxiety. Any hypotheses on what might be going on? This has been an unsolved mystery in my life...
Cold brew is weak coffee. The hot water extracts more, faster, from the grounds. Cold brew doesn't pull as much, even overnight. You get a smoother, sweeter drink, but far fewer compounds than heat or pressure (espresso) get you.

(This is not a slam on cold brew. If that's what you like, more power to you. It's great for a make-now-drink-later approach.)

Go to bed EARLY. No caffeine after 1500 hrs. Front load your liquids to limit getting up during the night. Then when The alarm goes off, get your ass up!
It irks me that caffeine free diet drinks have disappeared. Diet Coke, Diet Pepsi, and Diet Dr. Pepper used to come in caffeine free versions. But those were dropped to free up shelf space for new variants.
Quitting caffeine has been a no-op for me, but then again, caffeine was a no-op for me prior to that.

Glad it's working out for the author, though!

I gave up coffee with caffeine about 4 months ago. I still have the occasional decaf but it’s like drinking alcohol free beer, you drink very differently when you don’t get a high. My instinct is that stimulants are just not a good idea if you want balance.
Since we're throwing around anecdotes. I quit coffee for two years to help with anxiety. It did help with that, but there were zero other benefits, and the significant downside of not having something tasty to sip on.

After the first few weeks I didn't feel groggy in the morning without the coffee, but I definitely wasn't feeling any more rested. It didn't help me get to sleep any easier either. It also didn't help me get going in the morning any faster.

It did have some benefit to anxiety, but after I improved the original source of that anxiety (work related) I eventually went back to having coffee again simply because I really enjoy the flavour.

Do you have AD(H)D?

I clearly have some kind of thing in that spectrum, though I never pursued a diagnosis because I don't really want or need to take medicine for it.

But I have noticed I am NOT relating to anyone in this thread, or the OP, about the effects of caffeine. Yours is the closest, being under-whelmed by the effects of caffeine.

I don't NEED it in the mornings, it doesn't keep me up at night (I can have an espresso shot after a steak dinner at 8pm and still sleep fine), I don't get headaches from skipping a day, and it doesn't make me feel wired at all. What I do notice is that I really enjoy the flavor, and I do find that I feel "braced" if that makes sense. Which might just mean maybe I should get diagnosed and adderall would indeed help me.

For a long time I was compromising with no caffeine after 13:00 rule, but recently I have cut it out entirely and found large benefits in sleep quality and how rested I feel in the mornings. I still love coffee, so I have switched to mountain water decaf and roobois tea which is naturally decaffeinated.
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I'll throw in some data, too, cuz why not.

I quit drinking coffee a little over two years ago. I had a pretty strong addiction to it. I've got a Moccamaster that happily brews 10 cups and was drinking it 16oz at a time. There were plenty of days where I would need to run the Moccamaster multiple times. That said, it's tough to know exactly how much caffeine you're getting because there's a lot of variance in steep time, so YMMV. Coffee that I'd buy at a cafe definitely hit harder than what I was drinking at home.

I eventually went from drinking coffee, to measuring my caffeine intake with 100mg caffeine pills + decaf coffee for the routine, to green tea which said it was 50mg, to 50mg caffeine pills w/ 100mg l-theanine, to white tea which said it was 10mg, to nothing. I did that for about a year before eventually adding a premium green tea brand back into my cupboard, but only drinking it irregularly as well as having 50mg caffeine pills very irregularly.

One negative that went away entirely was armpit sweat. It was really common for me to have completely damp pits throughout the day due to the caffeine.

Another negative that went away was my energy would crash at the end of the day. I felt a bit sequestered into a timebox of when I'd be functional.

One thing I still fight with is cueing myself to "click on and do stuff" in the morning. It definitely gets easier the longer I go without caffeine, or the more structure I have in my day-to-day, but on open-ended days it can still be tough.

Also, if I do take any form of caffeine, my body immediately remembers the addiction and very much so would like to have more caffeine the next day. It seems great in the moment, but then suddenly one morning I wake up groggy, sort of like I'm hungover, and I'm like, "Oh yeah. This is what I stopped feeling and enjoyed, I remember now." and try to get myself back off of it. It only takes a few days for this to happen even at 50mg/day doses. This isn't entirely surprising because the half-life of caffeine is 8 hours, so 50mg/day builds up inside you at 6.25mg/day.

One positive is that it's really nice to be able to use caffeine in situations where opportunity cost is high rather than being continually reliant on it. I went to a friend's party a couple of weekends ago, we camped outside and stayed up all night, and I needed to pack up my tent the next morning on ~no sleep. Four ounces of coffee was enough for me to feel like a 100% fresh human all day. Super useful.

One negative is that caffeine absolutely fucks up my sleep schedule if I do take it now. It's not uncommon for me to struggle to fall asleep until 3am if I have any caffeine on a normal day unless I go run 7+ miles and drive my body into exhaustion. This includes something as innocuous as a diet coca-cola. (Note that diet soda has more caffeine than regular soda to account for the loss of energy rush from sugar.) I think this might be solvable with even lower mg doses of caffeine pills (like 10mg), but society is really geared towards marketing large amounts of caffeine to people so you have to be careful.

Overall, I am happy with the change and would like to continue with it, but it feels like a pretty fragile escape from addiction compared to other substances because most days I find myself wishing I was "more of a person" and caffeine tends to make me feel like "more of a person" but only temporarily and with a cost. So there's an internal struggle there. I contrast this with something like quitting marijuana where there's very, very rare days where I'll think, "It would be nice to be stoned!", but 99% of the time I'm just happy to be thinking more clearly.

Interesting how "quitting coffee" makes it up the rounds, and pretty much all the discussion perceives "quitting is good," -- but there's quite a bit of at least plausible evidence, both modern scientific as well as really old school, that suggest that coffee is really good for you?
Now that coffee is hilariously expensive I expect more such stories.
Quitting coffee was a really bad experience for me.

I had what felt like withdrawal symptoms: a strong headache, muscle aches, and I was really cold. It lasted for two days, until I took a minuscule sip and everything went away within five minutes.

That made me realize the extent to which I was actually addicted, and how dependent my body was on it.

I managed to quit and stayed caffeine-free for about a year.

But one day I said, “Just one cup won’t hurt,” and oh boy... it was like having superpowers. I was so focused, so wide awake. Of course, I’m an addict again. :(

Coffee without food really fucks up my stomach. people rarely bring that up. But after years of coffee without food, it can sorta kill your stomach
Talk about coffee is always skewed between I have no issues and a single drop after lunch ruins my night.

Caffeines half life in the body is strongly tied to age. As you get older, the half life gets so long you cannot metabolize a normal dose in 24hours. That is why people over a certain age often drink decaf.

So just because you can drink 5 cups a day at 25 doesn't mean it's the same at 65, or even 35.

I might be failing at reading comprehension, but after reading this short article several times, I still don't know what the "unexpected benefit" is.

The first couple paragraphs list (1) regular sleep schedule and feeling more rested, (2) "no zombie feel" first thing in the morning, and (3) less anxiety. And then it says "I still feel these benefits are true but I've also discovered a new one."

So what's the new one?

The rest of the article seems to discuss #2 again -- that the author can wake up and be productive without the kick-start of coffee.

Is there something I'm still missing in the rest of the article? (Yes, I've had my coffee today.)

Finally! A topic that I can directly contribute to!

I quit caffeinated coffee two years ago. A roaster nearby me came out with a decaf single origin that was so good, it not only convinced me that I don't need caf'ed coffee anymore, but it also won the 2024 US Brewers Cup.

During that time, I was also changing my sleep schedule as part of CBTi therapy I was undergoing to fix (or, more accurately, quell) a bout of sleep insomnia. The schedule was "wake up at 05:00 every day, including weekends and holidays."

The standard two weeks of caffeine "hangover" were pretty brutal, but the sleep improvements and lessen jitter were indisputable.

What was equally indisputable were my pronounced bouts of sadness/despair and, consequently, my strengthened desire to be alone. (I, like our cats, tend to want to be alone when something's wrong.) My drive and motivation to work also nosedived. Getting into anything, especially anything mundane, was a real challenge, even after changing my work environment and morning routine.

My ability to even _think_ was compromised. Putting together sentences and recalling phrases was harder. (The ability to do my job, motivation notwithstanding, wasn't affected, though.)

======

A new Saturday morning routine helped me connect the dots.

One of my favorite coffee shops opened up in my town recently. They have this coffee drink that is just the absolute best, and the shop itself is very cozy and great for reading. It was only natural that I'd eventually start my Saturday and, now, Sunday mornings there.

That coffee drink is caffeinated, and they didn't have a decaf option. I didn't care. Like the decaf bean that got me started on this whole kick, this was the only drink that I'd make an exception for.

Without fail, I'd be a COMPLETELY DIFFERENT PERSON about 20-30 minutes after finishing that drink.

Happier. Much happier. Talkative. Eager to work. Basically I'd become my old self again.

A shot of espresso did the same thing. It kept me sharp on long road trips and was (is) a fantastic pre-workout for my two hour heavy lifting days.

Coffee basically masked what, I now think, are symptoms of a minor depression. Which adds up: my work experience post-COVID is much worse than it was pre-COVID, the proliferation of AI has really taken a toll on me, and lots of stuff about the world just _feels_ worse.

I now drink caffeine sparingly with tapered draw downs, i.e. 2 cups on Monday, 1 on Tuesday, none on Wednesday and Thursday, 1 on Friday and 2 on Saturday and Sunday. I'm also selective about how I get my caffeine. I don't want to lose the sharpening effect it has or get dependent enough on it to need mountains of the stuff to chase the same benefits. (I know that my baseline will increase, since that's how drugs work.) Like other posters have said, I avoid caffeiene after 14:00, though I'll break this rule if I'm going to be out late, as caffeine has a ~6hr half-life.

Nonetheless, I'm really thankful for the two years of abstinence from it, as it finally convinced me that therapy for _just this_ might be worthwhile.

(My sleep has remained much improved. I no longer get up at 05:00 --- I am 10,000% convinced that I am NOT a morning person --- but I haven't had nearly as much trouble falling and staying asleep. CBTi helped tons, and I recommend it to anyone and everyone struggling with sleep --- after getting a sleep study, of course!)