On social media, an influencer's job is to influence you — to get you to strive for a particular lifestyle or buy a specific product. 

In some cases they're pushing medical tests, telling people to take charge of their health with full body MRI scans and cancer detection tools that have very little, or no evidence to support them.

Also, we take a comprehensive look at GLP-1s like Ozempic and Wegovy for weight loss. And who should be substituting table salt for potassium salt?