If you believe you have DAO deficiency and need to be seen by a healthcare professional, we recommend calling the headquarters of the International Institute of DAO Deficiency (DAO Institute) at (+34) 93 4176099 or contacting us directly via email at info@icddao.com.
DAO Institute is a healthcare organization dedicated to connecting patients with specialists in DAO deficiency worldwide, including registered dietitians, medical doctors, and psychologists. It was founded in Barcelona in 2015, and in 2022 Adriana Duelo took over its leadership, creating an international community of healthcare professionals specialised in DAO deficiency. Today, we are a team of more than 40 professionals, present in 35 cities across 18 countries. If you are a healthcare professional and would like to specialise and become a Licensed Member of the DAO Institute, you can submit your application for the next available edition here.
“Being part of the Institute means joining an international network of professionals like you, committed to specializing in DAO deficiency and integrating change into their lives and careers, a change rooted in action and grounded in nutritional treatment through prevention”.
Adriana Duelo, MSc
Co-Founder and Global Director of the DAO Institute
Symptoms and treatments
These are some of the symptoms associated with histamine accumulation due to DAO deficiency that we address at the DAO Institute through personalised low-histamine dietary interventions.








