The Smartphone Eating Disorder Risk Every Parent Should Know

The first smartphone is a milestone of late childhood, and a new study suggests its timing may shape how a child feels about food and weight years later. Researchers tracked nearly nine thousand US adolescents and found that owning a smartphone at twelve was linked to a higher smartphone eating disorder risk by age fourteen, according to MedicalXpress. Kids who got phones early were more likely to report binge eating, fasting or purging to control weight, and tying their self-worth to the number on the scale, as MedicalXpress's breakdown of the study explains.

The research, led by pediatrician Jason Nagata, drew on the ABCD cohort study, a long-running federal project following 8,957 participants across twenty-one US sites. Parents reported whether their child had a phone of their own; the teens then completed a standard psychiatric interview at twelve and again two years later at fourteen, allowing the team to track eating disorder symptoms over time. It is one of the clearest looks yet at the smartphone eating disorder risk during early adolescence.

What the researchers found

Nearly seven in ten of the twelve-year-olds owned a personal smartphone. Owners were thirty-six percent more likely to report any eating disorder symptom than non-owners. Two years on, the gap persisted: early phone owners faced a sixty-seven percent higher risk of binge-eating symptoms and a fifty percent higher risk of inappropriate compensatory behaviors such as extreme fasting or purging, as reported by LiveWell News. Owners were also roughly twice as likely to say their self-worth depended on their weight.

Importantly, symptoms are not diagnoses. Each teen answered yes or no to four questions about binge eating, compensatory behaviors, worry about weight gain, and weight-tied self-worth. A single yes counts as a symptom, which is a long way from a clinical eating disorder. The gap between owners and non-owners held up even after the researchers adjusted for sex, income, parental education, puberty, body weight, depression symptoms, attention problems, and how closely parents monitored their child, according to LiveWell News' detailed look at the findings.

Why a phone at twelve could matter

Nagata's explanation starts with what a phone delivers. As reported by LiveWell News, he told CNN that a smartphone can put "a world of appearance-focused content" in a young person's pocket, and that comparing yourself to influencers whose images are "curated, edited and filtered" can feed body dissatisfaction and poor self-esteem, a known risk factor for eating disorders. That comparison loop sits at the heart of the smartphone eating disorder risk researchers are describing. Twelve is also the age when puberty is changing bodies quickly and peers' opinions start to carry serious weight. Related coverage lives on the GenZ NewZ mind and body topic page.

There is independent backup for the comparison idea. A meta-analysis from the University of Palermo pooled eighty-three studies covering fifty-five thousand participants and found a moderate link between online social comparison and worse body image and eating disorder symptoms. An outside researcher, University of North Carolina psychologist Mitch Prinstein, told CNN that delaying phone access by six months or a year seems to benefit kids' mental health. The study appeared in JAMA Network Open in October 2026.

What it means for families and the school phone debate

The finding comes with real caveats. The study measured smartphone ownership, not what kids actually watched or scrolled, and the authors acknowledge that the measure did not capture content or use patterns. Ownership was not randomized, so reverse causation cannot be ruled out: a child already fixated on appearance might press harder for a phone. And nothing here shows that holding a phone back would lower any individual child's smartphone eating disorder risk.

Still, the evidence lands in a live debate about the smartphone eating disorder risk. School phone bans are spreading, and professional bodies including the American Academy of Pediatrics encourage families to delay and individualize smartphone ownership; Australia has set a minimum age of sixteen for social media accounts. The study authors also suggest tools like the pediatric academy's family media plan to help families build healthier media habits at home. For more coverage of issues like this, see the GenZ NewZ health topic page.

For teens and parents, the takeaway is perspective rather than panic. Knowing that an early phone carries an elevated smartphone eating disorder risk gives families one more reason to talk about what the feed is actually showing, and to treat the first phone as a parenting decision rather than just a logistics one. Anyone worried about their own or their child's eating should talk to a doctor: eating disorders are serious, but they are also treatable, and early help works.