Early smartphone use among youths tied to lasting mental health struggles–Study

A landmark global study has found that receiving a smartphone too early in childhood is strongly linked to lasting mental health challenges in adulthood, including higher risks of depression, anxiety, suicidal thoughts and diminished self-worth.

The research, published in the Journal of Human Development and Capabilities, analyzed data from more than 100,000 individuals aged 18 to 24 across 163 countries through the Global Mind Project.

It concluded that the age at which someone first owned a smartphone is a decisive factor in shaping their emotional resilience and cognitive development.

The findings reveal a steep decline in mental health outcomes among those who received smartphones at very young ages. On the Mind Health Quotient scale, young adults who first owned a smartphone at 13 scored an average of 30, compared to a near-zero score for those who got one at age 5.

The youngest owners were far more likely to report severe symptoms, including suicidal thoughts, aggression and detachment from reality. Nearly half of females who received their first smartphone at ages 5 or 6 reported suicidal ideation, compared with just over a quarter of those who received one at 13.

Researchers identified early access to social media platforms as the most significant driver of harm, explaining up to 70% of the mental health decline. Children exposed to social media before age 13 faced greater risks of cyberbullying, sleep disruption and strained family relationships — all of which amplified emotional vulnerability.

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In English-speaking countries, where children typically access devices and platforms earlier, the risks were even more pronounced. These regions also reported higher exposure to exploitative and hyper-sexualized content.

Experts say the harms stem from exposing children to algorithm-driven digital environments long before their brains are prepared to process them.

The prefrontal cortex — which governs decision-making and impulse control — does not fully mature until the mid-20s, making younger children particularly susceptible to harmful online experiences.

The authors recommend delaying personal smartphone ownership and social media access until at least age 13, alongside mandatory digital literacy training and stricter enforcement of age restrictions. They estimate such measures could reduce severe mental distress in young adults by 8.5% and lower suicidal thoughts by up to 20%.

Practical steps for families include creating no-phone zones, prioritizing basic phones for children under 13, limiting algorithm-driven content exposure, and ensuring digital education precedes unsupervised online use.

“These are not minor personality shifts,” the study concluded. “They represent long-term changes in how young people handle stress, form relationships and view themselves — with consequences that last well into adulthood.”