Smartphone Ownership at Age 12 Linked to Increased Disordered Eating Risk in Adolescents

A recent study indicates that children who own a smartphone at the age of 12 may exhibit higher risks of disordered eating symptoms by age 14. The findings highlight the potential implications of smartphone ownership on adolescent health.

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Study Overview and Findings

Researchers from the University of California at San Francisco conducted a significant study that analyzed data from nearly 9,000 adolescents, part of the Adolescent Brain Cognitive Development Study (National Institute on Drug Abuse, 2025), which is the largest long-term investigation into brain development and child health in the U.S. The study discovered that approximately 70 percent of participants owned a smartphone by age 12. Notably, those with smartphones were 67 percent more likely to engage in binge-eating behaviors and had a 50 percent increased risk of employing inappropriate compensatory measures, such as using diet pills or excessive exercising, to manage weight by age 14.

Adolescents owning a smartphone by age 12 were found to be 67% more likely to engage in binge-eating behaviors and reported a higher risk of disordered eating symptoms by age 14.

Moreover, adolescents who owned smartphones were found to be almost twice as likely to correlate their self-esteem with their weight and reported a 49 percent higher likelihood of expressing any eating disorder symptoms. It is crucial to note that the research does not establish a direct causal relationship, though it suggests that parents and health care providers should consider the timing of smartphone ownership when evaluating a child’s mental health and eating behaviors.

Gender Differences in Body Image Concerns

The study also highlighted significant gender differences regarding body image anxiety. Among the participants, girls who owned smartphones at age 12 were nearly three times more likely to report worries about weight gain by age 14. According to Jason Nagata, the lead author and an associate professor of pediatrics, concerns about body image manifest differently in boys and girls. While girls often focus on weight loss, boys may desire muscle gain, which could account for the distinct patterns observed.

This finding ties into a broader context in which exposure to social media often perpetuates appearance-related pressures. The researchers aimed to emphasize the implications of simply possessing a smartphone, rather than focusing on specific social media usage patterns.

The Role of Social Media in Eating Disorders

As Jessica Scheer, CEO of the National Eating Disorders Association, pointed out, smartphones can expose adolescents to harmful content that promotes distorted body image ideals. She noted that previous surveys indicated many individuals with eating disorders experienced worsening symptoms after encountering appearance-related online content. This raises concerns about the exposure to potentially damaging messages, which can exacerbate disordered eating or hinder recovery efforts.

Additionally, adolescents may inadvertently fill their social media feeds with harmful content, including posts that celebrate unhealthy eating behaviors, disguising them as wellness advice. The association between early smartphone ownership and emerging disordered eating symptoms is particularly crucial, as it can compound existing vulnerabilities in adolescents.

Guidance for Parents on Smartphone Usage

Given the study’s findings, experts recommend that parents carefully assess the appropriate timing for giving their children smartphones. Rachel Rodgers, an associate professor specializing in body image, suggests that parents should tailor their decisions to individual circumstances and ensure open communication about smartphone use. Establishing guidelines and discussing the content adolescents may encounter is essential for fostering healthy online habits.

Moreover, experts advocate using parental controls and advise parents to engage with their children’s social media experiences. Regular discussions about online interactions can promote critical analysis and understanding of potentially harmful messages. It is also important for parents to remain vigilant, as even with precautions in place, adolescents may still encounter harmful content.

THE CNP TAKEAWAY

Parents should carefully consider the implications of smartphone ownership for their children, particularly as it relates to body image and disordered eating. Open dialogues about media consumption and setting appropriate boundaries can help mitigate potential risks.