Why more caffeine isn’t always the answer

There’s a very familiar point in the day where coffee stops feeling like a choice and starts feeling like a reflex.

You slept reasonably. You’ve already had one cup. Maybe two. It’s 2:47pm, your attention is slipping, the next meeting starts in 20 minutes and there’s still a whole evening after work.

So you reach for caffeine again.

Sometimes that works perfectly.

Sometimes you end up more awake, but somehow not any better.

Your body has energy. Your brain is still wandering. You feel a little faster, a little less patient, and by bedtime you’re wondering why you’re suddenly not tired anymore.

The problem is that wakefulness and feeling switched on aren’t quite the same thing.

Caffeine works. That’s why we keep using it.

Caffeine blocks adenosine receptors, reducing one of the signals that builds sleep pressure throughout the day.

That can make you feel more alert and less tired. There’s nothing particularly controversial about that.

The complication comes when the answer to every drop in performance becomes more caffeine.

Research consistently suggests that caffeine can interfere with sleep, particularly depending on dose and timing.

A 2023 systematic review and meta-analysis covering 24 studies found that caffeine reduced total sleep time by an average of around 45 minutes, reduced sleep efficiency, increased the time it took people to fall asleep and reduced deep sleep.^[1]

One controlled study found that even 400 mg consumed six hours before bed significantly disrupted subsequent sleep.^[2]

That creates an awkward feedback loop:

The obvious lesson isn’t “stop drinking coffee”.

It’s that caffeine is a tool, and tools work better when you stop asking one of them to do every job.

More awake doesn’t always mean more focused

You can probably recognise the difference.

There’s the version of tired where you genuinely want to fall asleep.

Then there’s the version where you’re completely awake, but your brain is moving between Slack, email, five browser tabs and whatever you’re supposed to be doing.

Caffeine can help with alertness.

It doesn’t automatically decide where that alertness goes.

That’s part of why the caffeine + L-Theanine combination has attracted research interest.

In a randomised placebo-controlled study, 97 mg L-Theanine + 40 mg caffeine improved performance on a task-switching measure compared with placebo.^[3]

That doesn’t mean the combination is magic. It does suggest something more interesting than “more stimulant = better”:

the quality of the state matters.

That’s the distinction worth paying attention to.

The afternoon coffee can become tomorrow morning’s problem

Caffeine also hangs around longer than people often realise.

A meta-analysis estimated that, on average, coffee containing around 107 mg caffeine would need to be consumed roughly 8.8 hours before bedtime to avoid reducing total sleep time. Individual metabolism varies, but the broader point is simple: late caffeine can still matter much later.^[1]

That doesn’t mean nobody should drink coffee after lunch.

It means there’s a trade-off.

Sometimes the 4pm coffee genuinely saves the afternoon.

Sometimes it quietly borrows energy from tomorrow.

What to try before automatically ordering another one

If you’re reaching for caffeine because you feel off, it’s worth asking what kind of off.

If you’re genuinely sleepy

You may simply need recovery. A short walk, daylight, food or, where possible, actual sleep will address something caffeine can only temporarily mask.

If you’re restless and distracted

More stimulation may not solve the problem. Put the phone somewhere else. Close tabs. Change rooms. Give one thing 25 uninterrupted minutes.

If you’re flat

That can be different again. Motivation and willingness to exert effort involve systems beyond simple wakefulness, including dopamine-related networks involved in effort and reward.^[4]

If you’re hungry or dehydrated

Fix that first. It’s extremely easy to turn “I haven’t eaten properly since 9am” into “I need another coffee.”

If you still want caffeine

Use it deliberately rather than reflexively.

Know roughly how much you’re taking. Think about the time. And ask whether you want more stimulation, or simply a better state for what comes next.

Where Elevate fits

Elevate was built around that last question.

It contains 70 mg of natural caffeine, deliberately below the kind of dose you’ll find in many high-stim products, alongside L-Theanine and a wider formula built around focus, drive and composure.

It isn’t there to tell you coffee is bad.

Sometimes coffee is exactly what you want.

Elevate is simply another option for the moments when being more awake isn’t the whole brief.

Explore Elevate

The bigger idea

Energy is useful.

But the goal usually isn’t to feel energetic for its own sake.

You want enough energy to have the conversation. Finish the work. Train properly. Make the dinner. Be present on the date. Get through the airport without feeling like a zombie.

The coffee isn’t the goal.

The moment is.