Insomnia is prevalent in the global population. Diamino oxidase (DAO) is an enzyme that degrades histamine. When there is not enough DAO enzyme activity in the body, histamine accumulates and it can lead to symptoms in the nervous system, among others. In this study we wanted to study the prevalence of DAO deficiency in pacients with insomnia symptoms.

Inclusion Criteria:

• Older than 18 years old
• With one or more symptoms of insomnia
• Explicit acceptance to participate to the study through informed consent

Exclusion Criteria:

• Insomnia symptoms that could be justified by the existance of another sleep pathology (e.g., narcolepsy)

Patients with insomnia symptoms attending AdSalutem sleep center

Antropometric data

According to legislation