By Veeno Dewan
Studies around the world have shown that heavy social media use among teenagers is becoming a serious problem, linked to mental health issues and poor physical health outcomes, including shorter sleep and higher rates of obesity. Research involving more than 9,000 adolescents across eight countries found a strong association between problematic social media use and higher rates of depression and anxiety. A recent 2025 Pew Research Social study on Media, Technology and Teenagers found that teenagers use the internet “almost constantly,” and 9 in 10 teens use social media daily through platforms such as TikTok, Snapchat, Instagram, WhatsApp, YouTube, and Facebook. Although most social media platforms have a required minimum age of 13, almost 40% of children between the ages of 8 and 12 use social media.
Why are teens hooked on social media?
Neuroscience researchers around the world have identified key explanations for why teenagers are hooked on social media. The research shows a direct correlation between the teenage brain’s reward center (the mesocorticolimbic circuit, ormesolimbic pathway) and the way social media platforms display Likes, Comments, and Shares, which deliver instant gratification and a rush of dopamine (the pleasure hormone) to a teenager’s prefrontal cortex (responsible for impulse control), which is still developing. Because impulse control is still developing in teenagers’ brains, they naturally struggle to resist these compulsive, pleasure-seeking cycles. Dopamine is hard to resist, and developmental imbalances make it fundamentally harder for teenagers to put their phones down on their own.
Here are the primary reasons social media algorithms and features successfully capture and retain teenagers’ attention:
1. Dopamine-Driven Reward System
Social media functions like a digital slot machine. Every notification, like, or positive comment triggers the release of dopamine in the brain, the same neurotransmitter associated with pleasure and reward. The unpredictability of when these rewards will arrive makes the behavior incredibly hard to stop, creating an ongoing loop of craving and reinforcement.
2. The Fear of Missing Out (FOMO)
Adolescents have a fundamental need to belong and fit in with their peers. Social media offers an immediate window into what friends are doing, fueling compulsive checking. The fear of being left out or missing a trending topic pushes teens to stay constantly connected to the internet.
3. Infinite Content and Algorithms
Platforms like TikTok, Instagram, and YouTube use personalized algorithms that feed teens highly engaging content tailored to their interests. Features like infinite scrolling remove natural stopping points, making it easy to lose track of time and build long-term habitual screen time.
4. Identity Building and Community
Social media is a major outlet for teenagers to express themselves, form their personal identities, and build communities. For teens who may feel isolated or marginalized offline, online networks can provide vital support, validation, and connections with like-minded individuals.
Some experts believe that mental health concerns may be an unexpected side effect of increased social media use. While the link between the two is still being researched, it’s becoming more important to monitor how children and teens use social media and the effects it has. Jennifer Katzenstein, Ph.D., co-director of the Center for Behavioral Health at Johns Hopkins All Children’s Hospital, discusses what is known about social media’s effects on mental health in children and teens. “Research has demonstrated that there are high rates of depression with very low social media use and very high social media use, demonstrating that there is a ‘sweet spot’ of use for each child that is often specific to their own developmental level and protective factors,” Katzenstein says.
Teaching Children and Teens to Have a Healthy Relationship with Social Media
Neuroscientists have recommendations to help parents work with their children to create healthy digital habits and encourage moderation in its use. Discussing the negative effects with children and teens to raise awareness can help mitigate them. Parents may want to consider and research the following strategies:
- Delaying smartphone purchases until the child is ready.
- Take regular breaks from digital devices.
- Turn off notifications.
- Establish phone-free hours and spaces.
- Discuss appropriate boundaries and behaviors when interacting online.
In March 2026, in a landmark decision, a Los Angeles jury found that social media company Meta and video streaming service YouTube harmed a young user with addictive design features that led to mental health distress, including body dysmorphia, depression and suicidal thoughts. The verdict has escalated calls for more regulation of social media platforms across jurisdictions. Countries like Australia, France, the U.K., and Spain have already introduced age restrictions for social media use.
Meanwhile, Canada has also taken steps to address social media addiction among children and teens. The new Digital Safety Commission of Canada is being established to oversee compliance and other measures under the Safe Social Media Act, introduced in June 2026. The new Act includes provisions such as the Under-16 Account Ban, which restricts individuals under 16 from having social media accounts. Other initiatives and restrictions include safety standards, age verification, and harsh penalties for social media companies that fail to comply, which can be fined.
Sources: Government of Canada, Digital Safety Commission of Canada, StatsCan, Canada Safe Social Media Act, John Hopkins Medicine research, Carol Vidal, MD, PhD, MPH, Jennifer Margaret Katzenstein, PhD, 2025 Pew Research study, Digital Media Safety initiatives.
