BMJ Nutrition, Prevention & Health.According to the National Institute of Mental Health, depression is a mood disorder that lasts for at least 2 weeks and can have a range of symptoms.
These can include feeling sad, angry, irritable, worthless, guilty, or helpless. Some people may be uninterested in hobbies and activities, feel tired, find it hard to concentrate, have trouble sleeping, or even feel suicidal.About 7% of all adults in the United States have had at least one major depressive episode in the past year.Treatment for depression usually involves medications, talking therapies, or a combination of both.A variety of factors, whether biological, genetic, environmental, or psychological, can cause depression.