I have to agree with that to some degree; some degree because I am not 100% dependent on the scientific world for answers. Had I listened to my vet three years ago when my senior horse was formally diagnosed as insulin resistant, yet had never been laminitic, I may have caused more harm than good by putting that horse Pergolide as the vet wanted to do.
I took my own course of strict diet and herbs. He is coming 23, still the alpha-dominant in the herd, acts like he's 10 and that same vet can't believe how healthy he is --- including his rock crusher barefoot hooves that hit a lick across the gravel (at liberty) without flicking an ear.
I sincerely doubt the purity of some of the SmartPak products and will not buy them.
I now have two insulin resistant horses and I need solid proof that what I am giving them is either corn/oat/soy free or is pharmaceutical grade.
I can see how folks in boarding situations can become easily enamoured with something like Smartpak, however, just because it's the "most popular supplement flavor" of the decade doesn't make them right.
I privileged and thankful to have my horses on my own property so I custom mix what they need according to:
1. What a particular horse's issues are.
2. My hay test.
3. Soil test.
4. Lots of research on legitimate web sites.
5. Vet's thoughts.
I live in the Tennessee Valley, a/k/a "allergy purgatory" for humans and animals alike. My horses and one dog have lived with me in four states and I have never had skin/pollen/runny-sneezy nose problems with anyone until we moved here.
Point-being, taking care of them here doesn't even resemble how I cared for them in other states we lived in, so I give them what they currently need from companies I know create a pure product as opposed to supplements that are good mostly because they are so convenient, in turn, making them extremely popular.
The old phrase "if everyone else jumped off the bridge, I suppose you would too" applies with SmartPak. Don't use it just because someone else is, too many horses are getting things they don't need for that reason