There is no research. It is "from observation" adn teh facts around those observations are either nonexistent or not shared.
As said earlier, observation is important. It's a big part of what we do here. Observation without critical thinking, knowledge of all the factors that may come into play and knowledge of the physiology of the horse can lead to faulty recommendations. Mots of the foundation of this group and others like it is a belief system, not based on the facts as they are known today.
Nancy C in NH
ECIR Moderator 2003
FACT: Insulin resistance (IR) is the failure of insulin sensitive cells to respond to “normal” levels of insulin. See E. M. Kellon, VMD, Diagnosis of Insulin Resistance and PPID, 2013 NO Laminitis! Proceedings, Equine Cushing's and Insulin Resistance Group Inc.