Seven Days Without Coffee: What My Brain Actually Did

Two of my own coaches gave up coffee recently, and each of them came back reporting the same thing - sharper thinking, clearer heads, no more slumps, no more brain fog. One of them had even gone digging into the research on it.

My first reaction was fast and loud: “No way, man! I love my coffee. I can't function without it!”

And it was that exact thought that made me stop.

I can't function without it. 

That's a story. I don't actually know if it's true - I've not tested it in 20 years. So I decided to find out.

Why I actually did this

It wasn't really about coffee. I've been feeling a bit too settled into routine lately. Not for any deep or sinister reason - just the normal way life gets, where the things that bring you joy seem to slide because you fell out of habit, not because you stopped wanting them. I needed something to break the cycle and remind myself I can still do hard things.

And there's this too: I work with people on exactly this kind of thing… the stories we tell ourselves about what we can and can't do. If I'm going to ask my clients to challenge their stories, it’s important to me that I walk my talk.

So instead of a dramatic "That's it, I'm done with coffee forever!" moment, I put a container around it. Seven days. Anyone can do anything for seven days if they decide to.

Step one was making the decision. Step two was picking the timeframe. And at the end of the seven days, I'd decide again - keep going, or go back to my stove-top long black and call it an interesting experiment.

Setting myself up properly

I did this on a week I already had off work, at home, with no big commitments. If I got a headache or needed to lie down, I could. There's no point trying to give up something you love while you're also under pressure. You're just stacking one hard thing on top of another and that’s just silly! Set the conditions so the experiment can actually run.

The brain doesn't like an empty space

I still wanted a hot drink in the morning. Eggs on toast aren’t the same without it. Plus, our brains don't cope well with a void. If you're removing something, you can do it without replacing it, but it's a hell of a lot easier if you give yourself something to look forward to instead.

For me, it was tea. I already love tea - I'm a green tea drinker most days, with a soft spot for Earl and Lady Grey. So tea was the obvious swap. But I wanted more than a teabag dunked in a mug at the sink. I have a whole collection of beautiful teapots and teacups that don't get nearly enough use, so I decided to bring out the actual ritual: choosing the pot, choosing the cup, choosing the tea, every single morning.

I went to the T2 store in Rundle Mall and told the woman there exactly what I was doing. She talked me through herbal and decaffeinated options and the difference between the two main ways tea and coffee get decaffeinated (one uses chemical solvents, the other uses what's called the Swiss Water Process, which uses only water, temperature and time to draw the caffeine out, no chemicals involved – much more my style). I walked out with a couple of teas I was genuinely excited to try.

A quick caffeine reality check, because I know some people will say, “Beck, green tea still has caffeine in it.” Yep, I know. But here are the facts: an average cup of coffee runs somewhere between 95 and 165mg of caffeine. Black tea sits at roughly 40 to 70mg. Green tea comes in lower again, around 20 to 45mg. So sure, the swap wasn't zero caffeine, but it was a fraction of what I'd been running on.

The week, day by day

Day one: headache, and by about 2pm, proper brain fog - the kind where you can't hold a clear thought and all you want is a nap. Which, funnily enough, tracks exactly with what the research says: caffeine withdrawal symptoms typically kick in within 12 to 24 hours and peak somewhere between day one and two. So it turns out, my brain was just doing the very normal thing brains do when the caffeine that's been sitting on their adenosine receptors suddenly isn't there anymore.

Day two: a full pyjama day, on purpose. Home with the dogs, movies on, no pressure to be anything other than horizontal. Easy, because I wasn't asking much of myself.

Day three: this is when I actually noticed something had changed. Up at my usual 7:30, out for most of the day with my niece, a lovely lunch, home in the afternoon. Normally this is exactly when I'd hit a slump but this time, I didn't. I pottered around the house, got things done, and didn't feel tired until much later than usual, which is the opposite of what you'd expect. You'd think cutting caffeine would have you in bed earlier, not later. No brain fog. More energy. Genuinely surprising.

Day four and five: things got clearer, and then something unexpected showed up - I got creative. Ideas about my business started flowing, and my energy picked up even more. I found myself genuinely looking forward to sitting back down at my desk, even though I was still technically on a week off. In all honesty, I can't tell you whether that was the caffeine leaving my system or simply having a few uninterrupted days off work. It's probably both. What matters isn't which one gets the credit, it's that I noticed it, and I've acted on it.

There's actually some interesting research here that lines up with what I felt. A study out of the University of Arkansas gave people either 200mg of caffeine (about one strong coffee) or a placebo, then tested two different kinds of thinking: convergent (solving a problem with one right answer) and divergent (generating new, original ideas). Caffeine gave people a real edge on the convergent problem-solving. It did nothing at all for divergent, creative idea generation. So the version of me that came up with ideas on day four and five wasn't fighting against the caffeine, caffeine was never doing much for that kind of thinking to begin with. Maybe it was even hindering it… who knows?

Day six: the real test. I met a friend for brunch, and the second I sat down I nearly ordered a coffee purely out of habit - it's just what I do at a cafe. I had to get up and order at the counter rather than have someone come to the table, which turned out to be useful, because it gave me a few extra seconds to actually think about what I was doing. I stood there half-jonesing for a coffee and asked myself the honest question: is it the coffee I actually want, or just the habit and the feeling I associate with going out for brunch? The answer was habit. Because when I asked myself straight up, “Do I actually want a long black or a flat white right now?” The answer was no. Truth is, I think most café coffee is pretty ordinary anyway. I ordered my tea, and I was completely happy with it.

Day seven: the hardest day of the lot, and it caught me off guard. It felt like day one all over again - a bit sluggish, a bit headachy, needing a nap in the afternoon. It happened to be a Sunday, so I actually lay down before friends arrived. Part of me thought, “Hang on, have I gone backwards?” But it didn't rattle me. It could have been any number of things - sleep, hydration, hormones - and honestly, it didn't change how I felt about the seven days overall. Just an interesting wrinkle to note rather than a verdict on the whole thing.

On the people who'll say coffee isn't that bad

Some people will read this and think, “Why bother, Beck? Coffee isn’t bad for you.” Fair question, and I want to be clear about my answer: This had nothing to do with whether coffee is good or bad for me. I gave it up because I'd become reliant on it, and I wanted to know what was actually true underneath that reliance. I also like the idea of being sharper, more open to ideas, and have less brain fog. They’re the reasons.

The stories we tell ourselves

This is the part I actually care about most. Before I started, my internal (and external) dialogue sounded like this: “I can't function without coffee. I'll be exhausted without it. This is going to be really hard.”

None of that turned out to be true. It's been far easier than I expected.

There's a name for this in psychology - the self-fulfilling prophecy, first described by sociologist Robert Merton back in 1948. The short version is that our expectations shape our physiology, our physiology shapes our behaviour, and our behaviour shapes the outcome, which then goes and confirms the very belief we started with. If that sounds familiar, it should… it's the same mechanism I talk about with the filters of the mind. Every experience comes in, we filter it through our beliefs, values, memories, etc. The brain decides what you notice and how your body responds, and then it hands you back a version of reality that proves the filter right. Researchers have also found that the attention systems in our brain adjust according to what we expect to find, filtering the world to match the story we're already telling, which is a neuroscientist's way of describing exactly what a filter does. Negative self-talk in particular has been linked to measurable changes in how different regions of the brain communicate with each other. This isn't a fluffy idea. It’s science, and it shows up in the wiring.

So when I said I can't function without coffee, I wasn't describing a fact. I was running it through a filter and then living inside what that filter handed back. Worth asking yourself what other filters you've got running on autopilot, and whether they're showing you what's true or just what's familiar.

Where to from here

Seven days is up, and I've made my decision: I'm not going back to drinking coffee every day. That doesn't mean coffee is banned from my life forever - I'm treating it the way Cookie Monster treats cookies... as a ‘sometimes food’ (yes, I did the voice when I wrote that). Coffee is a sometimes thing now, not an every-morning thing.

I'm not making some grand, permanent declaration about it either. I don't need to decide today whether that means once a week, once a month, or only at a cafe with a friend. I'm simply doing another seven days, paying attention to how I feel, and deciding again from there. Same approach that got me here in the first place - small decision, short timeframe, see what's actually true.

So that's my week. No coffee, a lot of teapots finally earning their keep, and one less story running the show. But underneath the tea and the teapots, this is the actual work - catching a belief before it catches you, and running a small, honest test against it instead of just accepting it as fact. That's what I do with clients every single day. Turns out it works just as well on a Tuesday morning with a cup of Earl Grey as it does in a coaching session.

---

If reading this has you wondering what stories you've been running on autopilot - the ones about what you can and can't handle, what you need to get through the day, what's "just who you are" - that's exactly what Stop the Hijack 5-Day Challenge is built for. It's free, five days, 30-minutes a day, one-on-one with me. By the end, you'll know exactly which of those stories are actually true, and which ones you've just been carrying around out of habit. [Book your free qualifying call here]