Teens and young adults who spend more than three hours a day on social media face roughly twice the risk of depression and anxiety symptoms.
That threshold was first raised in the 2023 U.S. Surgeon General's advisory on youth mental health.
It has now been reinforced by a fresh meta-analysis of 24 studies.
Researchers found a significant and positive association between social media exposure and mental disorders in adolescents and young adults.
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The meta-analysis, published in Behavioral Sciences in 2025 by Hector Cabezas-Klinger, Fabian Felipe Fernandez-Daza and Yecid Mina-Paz, pooled evidence covering 12 to 24 year olds.
The aggregate correlation between social media use and mental disorders came in at r = 0.2173, a modest but statistically significant link.
The concern extends past low mood. The pooled evidence covered suicidal ideation, anxiety, insomnia, eating disorders and cyberbullying, with especially strong signals for eating-disorder symptoms and for both being bullied online and doing the bullying.
How much time young Americans actually spend
The 2023 U.S. Surgeon General's advisory reported that up to 95 percent of American teens ages 13 to 17 use social media, and more than a third say they use it "almost constantly."
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Eighth and tenth graders averaged about 3.5 hours a day, already past the threshold linked to doubled mental-health risk.
Three mechanisms researchers keep pointing to
Researchers describe three overlapping pathways.
The first is social comparison, especially among adolescent girls looking at curated feeds.
The Surgeon General's advisory ties social media to "body dissatisfaction, disordered eating behaviors, social comparison, and low self-esteem."
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The second is sleep displacement.
Scrolling in bed replaces sleep directly, and evening screen light suppresses the release of melatonin, the hormone that shifts the body into sleep.
Late-night notifications add a further route, waking users after sleep has begun.
The third is displacement of in-person time.
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Passive scrolling crowds out face-to-face contact, exercise and outdoor activity, all of which independently support mood.
What actually helps
Cutting back seems to move the needle.
A 2025 study of more than 35,000 users by Northeastern University's David Lazer and colleagues, released as a National Bureau of Economic Research working paper, found that deactivating Facebook or Instagram for six weeks produced measurable improvements in happiness, depression and anxiety measures.
Instagram deactivation was about 22 percent as effective as an average psychological intervention.
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Facebook deactivation reached about 15 percent.
A few practical steps for young people and parents.
- Set an app timer that hard-caps daily social media use below three hours.
- Batch notifications into two or three check-in windows a day instead of constant pings.
- Keep phones and tablets out of the bedroom overnight.
- Swap one scrolling block a day for a walk, a call or time with friends in person.
For persistent symptoms of low mood, hopelessness, sleep problems or anxiety, talk to a healthcare provider.
This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.