Dopamine Detox: Turn Down the Noise and Notice the Pull

I previously called it the Dopamine Detox Challenge. But after some research I came to the conclusion that the name is technically inaccurate. Dopamine is not a toxin and we need dopamine to move, to sleep and want anything at all. It is not the enemy. Our brain makes it constantly. Mice with no dopamine signalling don’t become calm and focused, they stop eating and die.

So now it is called: Turn down the noise & notice the pull.

Noise is not only the loud stuff. It’s the constant low-grade input: The notification, the podcast while cooking, the film playing while scrolling. Fourteen days of turning that down.

The pull is what you’ll actually measure. Nobody decides to check their phone before they’ve got out of bed. It happens automatically. Every day you’ll rate the strongest pull you felt, from 1 to 5, and write down what set it off. On day fourteen you’ll have a curve.

This challenge is not about banning all pleasure. It does not forbid to watch a movie for example. The idea is that when you decide to watch one, it is intentionally, not out of habit and you are not on your phone at the same time.

What the research shows

Removing the trigger works

Well established. Changing your surroundings so the temptation never comes up is one of the oldest and best-tested tools in behavioural therapy. It’s why the advice is “put the phone in another room” rather than “try harder.”

The phone study – promising, but one study. In 2025, researchers blocked mobile internet on 467 people’s phones for two weeks. Calls, texts and laptops still worked.¹ People’s mood, wellbeing and ability to concentrate all improved, and 91% got better in at least one of those. The researchers compared the attention gain to being ten years younger.

Here’s the part that matters most. They also looked at why it worked. Without mobile internet, people saw friends in person more, moved more, spent more time outside, slept more and felt more in control of their day.

So the benefit didn’t come from not having the phone. It came from what filled the gap. Keep that in mind as the whole challenge is built around it.

Screens before bed

The link is clear. Two big 2025 studies. Among 122,058 adults, people who used screens before bed every day were 33% more likely to sleep badly and slept about 48 minutes less per week.² In a Norwegian survey of 45,202 students, every extra hour of screen time in bed came with 59% higher odds of insomnia and about 24 minutes less sleep.³

But a link isn’t a cause. Both studies just took a snapshot. They can’t tell us whether screens cause bad sleep, or whether people who sleep badly reach for their phones. The one study that can say something about cause is the phone study above, where the change came first.

It’s probably not the blue light. A 2025 review found blue-light-blocking glasses made no real difference to how fast people fell asleep or how long they slept.⁴ Only three small studies, 49 people total, so more research is needed. 

The likely explanation is boring. Screens simply eat the hour you would have spent sleeping. What you’re watching probably keeps you alert too. The colour of the light matters least. That’s why our practice is a curfew, not a filter.

Coffee

Almost every detox bans coffee. The evidence is thinner than you’d think.

Coffee close to bedtime disrupts sleep – well established.

Where exactly the cut-off sits is much less clear. A 2025 trial found one coffee (100 mg caffeine) four hours before bed made no measurable difference to sleep, while four coffees’ worth clearly did and got worse the closer to bedtime.⁵

But look at who was studied: 23 men, average age 25. That’s the whole study. How fast you clear caffeine depends on your age, your sex, whether you take the pill, and your genes. Whether that four-hour rule applies to a 50-year-old woman is honestly unknown. Which is a good reason to test it on yourself rather than trust a number from a study you weren’t in.

My observation, not proof: Most people I work with don’t need to give up coffee. They benefit when stopping to drink it at two in the afternoon. That’s why quitting completely is optional here, and a 2pm cut-off is what I actually recommend. Going cold turkey in week one gives you a three-day withdrawal headache⁶ in exactly the days when everything else is already hard. And that’s when some people quit the challenge.

About sugar and addiction

For years I told clients that sugar is as addictive as cocaine. That was wrong. Here’s what I got wrong and what’s actually true.

“Sugar is as addictive as heroin” – evidence points against it.
Heroin plugs straight into receptors in the brain, gets there within seconds, and causes a withdrawal so predictable that doctors score it on a checklist: pupil size, goosebumps, stomach cramps. Sugar does none of that. When experts rank drugs by how addictive they are, heroin sits at the top.⁷ Sugar isn’t on the list – there’s nothing comparable to measure.

“Sugar is more addictive than cocaine” – one rat study, misread.
In 2007, researchers offered 132 rats a choice between cocaine and sweet water. 94% picked the sweet water.⁸ But the study shows what rats prefer, not what they become addicted to. In the same study, cocaine had the far bigger effect on the brain and the rats still chose sugar. “Preferred in a rodent choice test” became “more addictive than cocaine” somewhere between the journal and the internet.

“It uses the same brain pathway” – true, but it means less than it sounds.
So do music, exercise, laughing, sex and a good conversation. That’s simply the pathway the brain uses for anything enjoyable. Same road, very different traffic.

Sugar doesn’t bind to opioid receptors. Eating does release your own endogenous opioids, and those contribute to how much you like it. 

What is true
Some people genuinely do lose control and show addiction-like eating around highly processed foods – roughly 14 in 100 adults by questionnaire.⁹ That’s real and deserves proper support.

Does your taste change?
Partly. Cut sugar for a few months and the same dessert tastes sweeter than it used to.¹⁰ But you don’t like sweet things less. A study of 180 people over six months found no change in that.¹¹

What I believe is going on (my opinion, not proof).
In my practice, the pull toward dessert fades after about a month. I think my clients simply start eating enough and balanced. Eating too little makes cravings worse, and a dip in blood sugar a few hours after a meal predicts feeling hungry later.¹² But my clients change several things at once, so I can’t prove which one does it.

Behaviour can be addiction-like without the substance being pharmacologically addictive. Cue-driven, automatic, hard to stop, escalating over time. Which is why the food practice targets the cue (no sweet drinks, no packaged snacks) rather than sugar alone. 

The challenge

Three rules everyone keeps:

1. Screen curfew – 60 minutes before bed. 
   Phone charges outside the bedroom. 
2. Slow start – first 60 minutes awake, no screens. 
   Morning-anchored habits show greater habit strength than ones attached to other times of day.
3. Cues off. Notifications silenced except calls. Your two biggest pull-apps or websites logged out and off the home screen. The friction is the point.

Then choose your own. Two is recommended; more if you want the harder version.

The two most underrated are greyscale and the 48-hour rule. Near-zero effort, and both act on the cue rather than on your willpower.

Two things that will make or break your fourteen days

How it runs

• Live kickoff call. We design your personal version together and write your if-then plans that make it stick.
• The tracker. Sixty seconds a day. Your rules, one urge log, one line about what you did instead. From day three it draws your urge, sleep and energy curves; on day fourteen it shows which rule actually held.
• The group board. Optional. Off unless you switch it on. Shows your name, how many rules you took on and which ones, your daily bars, and your one line about what you did instead. Urge notes, sleep and energy stay on your own device.
• The WhatsApp group. For questions and support. Share what you did with the reclaimed hour and when you are having a difficult time. 

Sources