In today's digital age, the internet has become a major source of health-related information, but distinguishing reliable content from fake news has become increasingly challenging. In response, France’s National Institute of Health and Medical Research (Inserm) has developed an educational tool aimed at helping teenagers critically evaluate the health information they encounter daily. This initiative, called "Fake News Santé," is designed to combat the spread of misinformation and equip young people with the skills to make informed decisions. Teenagers are regularly exposed to health-related content on social media, video platforms, search engines, and even artificial intelligence-generated responses. This content can cover a wide range of topics, including medications, vaccines, nutrition, sleep, mental health, and more. Unfortunately, much of this information is unreliable, potentially leading to harmful consequences such as the use of ineffective treatments, delays in seeking medical care, or the abandonment of scientifically supported practices. To address this issue, Inserm has created a free digital educational kit that can be downloaded by students from the 4th grade up to Terminale (the final year of high school), as well as by teachers and school nurses. The kit includes animated presentations, a guide for educators, and interactive exercises. One of the key components is a collective fact-checking activity that simulates real-world scenarios by analyzing typical health-related content found on social networks. This helps students learn how to assess the credibility of information by examining its source, the field of expertise behind it, and the reliability of the evidence provided. The goal of "Fake News Santé" is not to provide a list of banned or false claims, but rather to help young people develop critical thinking and scientific literacy. The program encourages students to formulate hypotheses, evaluate the strength of evidence, and understand the difference between a single study and a collection of consistent findings. A key slogan promoted by the initiative is "Slow down, verify, then decide," emphasizing the importance of taking time to assess health-related information before acting on it. Inserm’s long-term objective is to empower young people to protect themselves from disinformation independently, rather than relying on direct answers to false claims.