depression as an umbrella term

The idea that depression may not be an isolated condition with one shared underlying cause, but rather that it may need to be reframed as an umbrella term for a group of related conditions with identical or very similar symptoms.

For the last several decades, depression has been treated by most modern medical professionals as a serotonin deficiency, treated with SSRIs. However, newer studies indicate that there may be several other possible contributing factors, including:

In these cases, a prescribed SSRI may help very little, if at all, and there is a possibility that other forms of treatment may be more effective.