The 2pm coffee and your 3am wake up

Today’s letter

The nine hour rule that could hand you back 35 minutes of sleep

In 1952, a trade group called the Pan-American Coffee Bureau spent two million dollars on one idea. Americans were drinking plenty of coffee at home, the Bureau noticed, but hardly any of it at work. So they bought radio spots and billboards and print ads across the country, all carrying the same line: give yourself a coffee break and get what coffee gives to you. They even hired a psychologist to help them say it the right way.

It worked. Within the decade most American businesses had built the afternoon coffee into the workday, and nobody has questioned it since. Now look at your feed. Every other video is telling you that the reason you feel wired and exhausted at the same time is your cortisol, and that you can flush it out with a powder, a mocktail, or a twenty dollar tub of something. The hashtag has close to 800 million views. Not one of those videos is going to mention 1952.

“Why can’t I just sleep like a normal person?”

You are not a fragile sleeper. Sick children have kept you up all night and you went to work the next morning without telling anyone. Four hours of sleep got you through a move, a layoff, a bad year, and you still made school pickup. So the fact that you lie awake at three in the morning now, in a dark house, feels like something has gone wrong with you specifically.

The advice you got made it sound like your fault. Wind down better. Put the phone away, manage your stress, try the magnesium and the sleepy girl mocktail and the breathing app. You did all of it, some nights for weeks at a stretch… and you still woke at three. That is when a person starts to think the problem is her.

Here’s what gets me.

You were never bad at sleeping. Something you drank at two in the afternoon was still working on you at three in the morning.

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According to a top sleep expert from the University of Washington…

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Studies show it releases a powerful “sleep-regulating” hormone, which helps you:

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It’s working like crazy for 36,498 people…

Susan R., from Denver, said: “I finally started sleeping straight through. No more tossing and turning, no more groggy mornings. For the first time in years, I wake up feeling truly rested."

Can you imagine how your nights would change once you start doing this simple cherry trick every night?

>>> Do This 30-Second Cherry Trick For Deep, Restful Sleep Every Night!

Let me show you how I know. Not with my opinion, because I am not a doctor and my opinion is worth nothing here. With a study.

Last fall a team in Taiwan finished a hunt through every decent caffeine and sleep experiment on record. They kept only the strict ones: the same person tested twice, once with caffeine and once with a dummy pill, with nobody told which night was which. Sleep diaries did not count. A night only went into the pile if the sleep had been measured with electrodes, in a lab, while the person slept.

Twenty two trials made the cut, covering 956 adults. Then the researchers pooled every measured night to see what caffeine actually does to a sleeping person, compared with that same person on a night without it.

What they found

Meta-analysis of 22 crossover trials, 956 adults, 2025. Chang et al., Sleep Medicine.

The caffeine nights (they slept less)

Total sleep time fell by about 35 minutes. Sleep efficiency, which is the share of time in bed actually spent asleep, dropped by almost 5 percent, and the deep slow wave sleep went down with it.

The placebo nights (they slept)

Same people, same beds, same bedtimes. Without the caffeine they fell asleep about 8 minutes faster and kept the sleep they were supposed to get.

Every one of those nights was measured by machine, not remembered in the morning.

In other words, caffeine did not only make falling asleep harder. It made the sleep itself thinner, and it did that to everybody in the study, the young ones and the middle aged ones alike.

None of those 956 people were weak sleepers. Neither are you, and no amount of trying harder was ever going to change what the caffeine was doing.

So why does a cup you drank in daylight still reach you in the middle of the night?

All day long your brain builds up a chemical called adenosine, and that build up is what sleepiness actually is. Caffeine works by sitting in the spot adenosine needs, so the sleepiness is still there and you just cannot feel it. The catch is how long it sits. Caffeine has a half life of about five hours in most adults, so half of your two o’clock cup is still in you at seven, and about a quarter of it is still there around midnight. Your brain is trying to run the deepest part of the night with a stimulant in the way.

Those 956 people never stood a chance against it. Neither did you, I’d bet.

That’s the part no one says out loud. In the caffeine trials, people could not tell the difference. They rated their sleep as fine on the caffeine nights while the machines recorded something else entirely… so the night you swear the coffee didn’t touch you is exactly the night it did.

Try this today

Take your usual bedtime and count back nine hours. That is your last caffeine of the day, and if you go to bed around ten thirty, it lands at about one thirty in the afternoon. A separate review of the caffeine research put the cutoff for a regular cup of coffee at 8.8 hours before bed, so nine is an easy number to hold in your head. The three o’clock cup becomes decaf, or tea, or a glass of water and a walk to the end of the street. Give it five nights before you decide, and judge it by what happens at three in the morning, not by how fast you drop off. Falling asleep was never the part the caffeine was taking from you.

Nine hours, and it costs you nothing. That is the one thing here nobody can sell you.

Promise me you’ll try it today? Saying it out loud is half of what makes it stick.

I’m in. I’ll try it today →

This is not magic, and moving one cup is not a cure for a bad night. Caffeine is only one of the things that can wake a woman at three in the morning, and it may not be the one waking you. It is simply the one you can test by yourself, this week, for free.

The 1952 campaign was never about your sleep. A trade group wanted more coffee sold, so it built an afternoon ritual and handed it to the whole country, and seventy four years later you inherited the thing without ever agreeing to it.

You have been carrying the blame for a habit that was designed, tested and sold decades before you poured your first cup. There’s still time for you.

And if you wake at three tonight, before you start listing everything you did wrong…

It was never your fault.

— Cole

P.S. What time was your last caffeine yesterday? Just the number, hit reply. I’ll tell you tomorrow where most women land.

Do This 30-Second Cherry Trick For Deep, Restful Sleep Every Night

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