HistaminX by Seeking Health is a unique blend of natural bioflavonoids, bromelain, and extracts of stinging nettle and broccoli that may work together to provide seasonal support.* IMPORTANT: HistaminX is manfactured for and sold exclusively by Seeking Health. We DO NOT recommend purchasing this product from any supplier other than Seeking Health on Amazon.com. Free of major allergens. Does not contain: milk, eggs, fish, shellfish, tree nuts, peanuts, soy or wheat. Physician-formulated.