18. March 2026

THE CHEMISTRY OF ATTENTION SERIES: SEROTONIN – THE BASELINE

There’s a version of you that feels steady.

Not buzzing. Not chasing. Not wired.

Just… level.

You’re not desperate for stimulation.
You’re not checking your phone every five minutes.
You’re not spiralling because something small went wrong.

You’re just… alright.

Most people don’t spend much time there anymore.

And it’s not because they’re broken.
It’s because the environment they live in is constantly pulling them away from it.

Serotonin doesn’t shout.
It doesn’t spike.
It doesn’t reward you with a hit.

It stabilises you quietly in the background.

And because of that, it gets completely overlooked.

Serotonin is often described as the “happiness chemical.”

That’s a neat label. It’s also misleading.

It’s not responsible for excitement.
It’s not the reason you feel driven or motivated.

Serotonin is what gives you a sense of internal stability.

It’s what allows you to feel:

• content without needing stimulation
• grounded without needing distraction
• okay without needing to improve the moment

It’s the difference between:
“I need something”
and
“I’m good as I am.”

When serotonin is functioning well, you don’t think about it.

That’s the point.

You’re not constantly seeking.
You’re not reacting to every little trigger.
You’re not pulled in ten different directions by noise.

You can sit still.

You can focus.

You can let things be incomplete without it bothering you.

And in a world built on constant stimulation, that’s a problem.

Because a person who is content is very hard to control.

Modern environments don’t reward stability.

They reward movement.
They reward engagement.
They reward reaction.

Every notification, every scroll, every piece of content is designed to pull you away from stillness and into activity.

Not because activity is better.
But because activity is profitable.

And the more time you spend chasing stimulation, the less time your system spends in balance.

Here’s where it gets interesting.

Serotonin and dopamine don’t operate in isolation.

They exist in tension.

Dopamine drives you forward.
Serotonin anchors you where you are.

One says:
“Go. Get more. Chase it.”

The other says:
“You’re already okay.”

If dopamine dominates, you become restless.
Always looking. Always chasing. Never satisfied.

If serotonin is stable, the chase softens.

Not because you lose ambition.
But because you’re no longer driven by lack.

Most people don’t realise how far they’ve drifted from that baseline.

Because they’ve adapted.

They’ve normalised:

• constant stimulation
• background noise
• mental restlessness
• low-level dissatisfaction

They don’t feel calm anymore.

They feel bored.

And boredom has become something to avoid at all costs.

But boredom isn’t the problem.

It’s the absence of stimulation.

And when stimulation disappears, what’s left is your baseline.

If that baseline feels uncomfortable, people run straight back to distraction.

Not because they want the distraction.

But because they don’t like what they feel without it.

This is where things start to spiral.

Because the more you rely on external stimulation to feel okay,
the less your internal system regulates itself.

And over time, the baseline drops.

What used to feel like “neutral” starts to feel like “low.”

So you chase more.

More content.
More noise.
More stimulation.

Not for enjoyment.

For relief.

And now you’re not choosing your behaviour.

You’re reacting to your chemistry.

This is where the attention industry quietly wins.

Not by making you feel good.

But by making sure you never feel settled.

Because settled people don’t scroll endlessly.
They don’t chase constant updates.
They don’t need to fill every gap in their day.

They can sit with themselves.

And that’s not a behaviour that can be monetised easily.

So instead, the system feeds the opposite.

Short bursts of stimulation.
Constant novelty.
Endless variation.

Just enough to keep you engaged.
Never enough to let you settle.

And over time, something shifts.

You lose the ability to just be.

Not in a dramatic way.

In small ways.

You reach for your phone without thinking.
You fill silence automatically.
You struggle to sit through anything without needing stimulation alongside it.

You don’t notice it happening.

But it’s happening.

This isn’t about discipline.

It’s not about trying harder or “being more present.”

It’s about understanding what’s happening underneath your behaviour.

Because when your baseline is off, everything built on top of it becomes unstable.

Focus becomes harder.
Decisions become reactive.
Emotions become less predictable.

Not because you’ve changed.

Because the system you’re operating from has shifted.

The uncomfortable truth is this:

Most people aren’t chasing more because they want more.

They’re chasing because they don’t feel okay where they are.

And that’s not a motivation problem.

It’s a baseline problem.

When serotonin is stable, everything slows down.

Not in a way that makes you less effective.

In a way that makes you more deliberate.

You don’t jump at everything.
You don’t react to everything.
You don’t need constant input to stay engaged.

You can choose.

And that’s the difference.

Because once you can choose,
you’re no longer being pulled around by whatever gets your attention next.

Serotonin doesn’t give you a high.

It gives you something far more valuable.

It gives you enough stability to not need one.

Sources

• Young, S. N. (2007). How to increase serotonin in the human brain without drugs
• Cools, R. et al. (2008). Serotonin and dopamine: unifying affective, activational, and decision functions
• Carhart-Harris, R. L. & Nutt, D. J. (2017). Serotonin and brain function: a tale of two receptors

Research Gaps & Limitations

• Serotonin is still not fully understood in terms of its interaction with mood vs behaviour
• Most research isolates serotonin artificially, whereas real-world behaviour involves multiple interacting systems
• Long-term environmental impacts (e.g. digital overstimulation) on serotonin regulation are still emerging