IT-TP Oral Paste for Horses. What is IT-TP Horse Supplement? Nutritional Support for The Equine Athlete. Who uses IT-TP Horse Supplement? Horses How does IT-TP Horse Supplement work? Each IT-TP Oral Paste 30cc syringe contains a myo-inositol tri-pyro-phosphate complex, in an all-natural cherry-flavored gum base. How is IT-TP Horse Suppl