Corta-Flx U-Gard is recommended to support normal stomach pH and maintain a healthy digestive tract. U-Gard contains all-natural ingredients such as Calcium and Magnesium that aid in acid reduction while ensuring your horse is eating the best ingredients. U-Gard maintains gastric health in all classes of horses, especially horses in work or in high-stress situations that are more likely to form ulcers. In a 73-day field study on active race horses, U-Gard was proven effective in decreasing gastric ulcer severity.