How We Decide Which Health "Experts" to Listen To

I recently saw some dietitians talking online about an article that listed the 100 most influential people in health and fitness. Their discussion was about the merits of an article that lists health "experts" based on their level of influential rather than the accuracy of helpfulness of what their message. What I want to talk about today though is the idea of health influencers and how we decide who to listen to and who not to listen to. Unfortunately, it isn't always based on someone's expertise or the evidence for what they're promoting.