All-natural herbal H blend, containing peony root and ginger, for use in horses suffering from seasonal allergies; to support respiratory health, normal histamine levels and a healthy immune system. AniHist H aids horses in combating environmental irritants and pollutants. Each oz contains min 10,000 IU vitamin D, min 320 mg ascorbic acid (vitamin C), min 5,000 mg peony root, min 9,000 mg ginger and min 2,000 mg choline chloride. The careful selection of ingredients pulled from nature's own cupboard. Peony root aids in the blocking of histamine effects and supports normal airway functions. Ginger, vitamin C and bioflavonoids have specific antioxidant and anti-inflammatory effects. Vitamin D may play an important role in fighting allergies .