Where are the ingredients in Histamine Block from?

Ingredients	Country
DAO2TM porcine kidney extract (Diamine Oxidase Activity 10,000 HDU)	Austria
Microcrystalline cellulose, Vegetarian capsule (hypromellose, water, and gellan gum), Vitamin C (as ascorbyl palmitate)	USA

We constantly are looking for the highest quality ingredients from around the world. Because of this, ingredient sourcing is subject to change at any time without notice.