This was a parody published in a top medical journal to bring attention to the fact that there are few research papers published that we can believe. Couple this with the fact that retractions in medical journals are at an all-time high, and both humans and horse owners don’t know anything but what they know based on their life.
Who do we believe? Where do we go to get information? It boils down to two things: 1) listen to your gut to determine if what you are listening to is reasonable, and 2) do what works for you and your horses. And if it isn’t working, change something, so it does work.