People love to share things on social media （媒体）like Weibo and WeChat. They show off things like foods and drinks. Stars have many social media followers. Many of them build ads into their posts （帖子）. So do other famous people.
Nancy, a 17-year-old teenager did a study into social media ads. She wanted to see if people share unhealthy foods and drinks. Nancy made a list of famous people on social media first. She picked 100 actors, 100 singers and 100 influencers （网红）. She looked for posts about foods and drinks. Then, she gave a grade for each of them. The grade showed how nutritious the food or drink was.
Nancy found that influencers shared the most foods and drinks by far. They also shared the most sweets which had an unhealthy grade. Nancy was surprised. She thought influencers would share healthier things. Fruits, vegetables and water were least shared by all three groups. Influencers often shared soft drinks. So did singers.
Influencers are often friendly and seem close to us. So young people are more likely to believe them. Many users are under 18 years old. “They should be kept away from unhealthy ads, " Nancy says."There should be new rules." Nancy has unfollowed some people. They were pushing unhealthy habits. Users need to choose who they follow in a smart way.
