Ask the Nutritionist: Dr. Getty's Forum for Equine Nutrition
Welcome to my forum.
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All the best,
Dr. Getty
Hi Erika,
I took a look at it and it has some very nice herbs, amino acids, and gynemia sylvestri (which lowers blood insulin levels). However, one dose only has 4,440 mg of magnesium and for a 1000 lb, insulin resistant horse, four times as much is necessary. But, that could end up providing more vitamin E than you would want (650 IU per dose) along with minerals such as copper and zinc (which could interfere with iron absorption). As a maintenance product for a horse that is genetically prone toward insulin resistance, but does not exhibit regional fat deposits (such as a cresty neck), this Smart Pak product is excellent. But it is not adequate for treatment purposes.
Another choice that is safer to feed at higher dosages, is CarbX (by Med Vet Pharmaceuticals) -- click on the link to learn about it. It also contains Gymnema sylvestri without the added minerals.
All the best,
Dr. Getty 
Thank you for your earlier reply regarding chromium supplement.
I have a friend who has had good results w/Smart Control IR from smartpak for her IR horse and would like to know your thoughts on this product.
Thank you.
Where are you from? Bayfield, CO
Hi Erika,
Glad to help.
Dr. Getty
Author of Feed Your Horse Like A Horse
Thank you so very much for all of your helpful information.
Erika
Where are you from? Bayfield, CO