I believe that this claim is true. Among adolescents, excessive social media use shows higher risk of mental health issues including depression, anxiety, poor sleep quality, and low self-esteem. Adolescents that spend more than three hours per day on platforms are twice as likely to experience these issues as shown in the article”Harvard Chan School of Public Health”. In particular, young girls experience a significant impact because of things like social comparison and seeing unrealistic standards due to the editing of images or filters. Cyberbullying has also become very normalized leading to people feeling more comfortable lashing out at others online. Additionally, a large percentage of children feel "addicted" to social media. As you said adults are also affected by social media. For adults, research has shown that social media use leads to more feelings of loneliness, anxiety, and depression. Similar to teens, adults also feel the negative effects of social comparison and excessive time spent online, which can lessen people’s want for real-life connections or physical activity. While social media can foster community and provide support, overuse often displaces healthier behaviors, such as physical exercise and face-to-face interactions, contributing to mental health challenges. HHS.gov Although social media has good parts of it, there are many negatives for all ages of people who use it, so I agree with your claim and believe it is truthful after researching it.