An advanced nutritional fortification against Ulcers in horses. Horses receiving Gastrazone daily have a continual influx of liquefied plant extracts enriched with selected nutritional isolates to help assist normal gastrointestinal function and dietary efficiency. Thiamine is also incorporated to assist in mainting a normal appetite and help offset deficiencies induced by plants containing Thiaminase (which renders Vitamin B1 ineffective) as well as diets deteriorating from unfavourable conditions or having low inherent levels.