Our DAO plus capsules are effective due to the active enzyme Diamine Oxidase (DAO) and complete due to the effect of vitamin C and Quercetin. DAO plus contains 4 small gastro-resistant tablets per capsule. The white/beige tablets contain the DAO enzyme (20,000 to 30,000 HDU per capsule), the brown tablet contains vitamin C and the green tablet contains Quercetin. In case of swallowing difficulties, it is possible to open the capsule and take the contents of the tablets loose, without chewing them. DAO plus is suitable for children 4 years and older.