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A 21-day total smartphone and social media detox improves sleep duration, daytime sleepiness, depressive symptoms, perceived stress, and working memory in adolescents, but effects are not maintained at 2-month follow-up.

In a pilot RCT with 82 adolescents aged 13-18, a 21-day total smartphone and social media detox (with or without a basic 'brick' phone) led to tentative improvements in sleep duration, daytime sleepiness, depressive symptoms, perceived stress, and working memory compared to controls. However, these improvements were not sustained at a 2-month follow-up. Retention was high with 13% attrition, and 83% of participants endorsed the need for government action on this issue.

Last updated: Aug 13, 2026•1 RCTs•📖 Read as article →

Evidence Score

Evidence Score44/100
Human RCT★★☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Innovations in Practice: A pilot randomised trial on smartphone and social media abstinence - effects on sleep quality and psychological wellbeing in adolescents.

observational

Sullivan EC, Cairney SA, Henderson LM · Child and adolescent mental health (2026)

Participants: N/A
Duration: 21-day intervention with 2-month follow-up
Intervention: Total 21-day smartphone and social media (S/SM) detox, with or without access to a basic 'brick' phone
Outcome: Sleep duration, daytime sleepiness, depressive symptoms, perceived stress, working memory
Effect Size: N/A (not reported in abstract)
Population: Adolescents aged 13-18 years from UK schools

Result:

PubMed: 42572187DOI: 10.1111/camh.70118

Mechanism Graph

Removal of smartphones and social media reduces nighttime screen exposure and social media-related arousal
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Reduced sleep disruption leads to longer sleep duration and less daytime sleepiness
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Decreased social comparison and online stress reduce depressive symptoms and perceived stress
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Improved sleep and reduced stress may enhance working memory performance

Limitations

  • ⚠Pilot trial with small sample size, not fully powered for definitive conclusions
  • ⚠Effects were not maintained at 2-month follow-up, suggesting lack of long-term sustainability
  • ⚠Self-report measures may be subject to bias, and wearable data may have compliance issues

Frequently Asked Questions

Does a smartphone and social media detox improve sleep in adolescents?▼

Yes, tentative improvements in sleep duration and daytime sleepiness were observed after a 21-day detox, but these were not maintained at 2-month follow-up.

How long does a digital detox need to be to see benefits?▼

In this study, a 21-day detox showed short-term benefits, but longer-term effects were not sustained, suggesting that ongoing or repeated interventions may be needed.

Are there any downsides to a total smartphone and social media detox for teens?▼

Yes, participants reported challenges such as boredom, functional reliance on smartphones, and fear of missing out, indicating that total detox can be difficult for young people.

What did adolescents think about government action on smartphone and social media use?▼

83% of participants endorsed the need for government action, indicating strong support for policy-level interventions.

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References

  1. 1.Sullivan EC, Cairney SA, Henderson LM. "Innovations in Practice: A pilot randomised trial on smartphone and social media abstinence - effects on sleep quality and psychological wellbeing in adolescents.." Child and adolescent mental health, 2026. PMID: 42572187 DOI: 10.1111/camh.70118
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.