Description
The Serotonin Blood Test measures the level of serotonin, a neurotransmitter that plays a key role in mood regulation, sleep, appetite, and gastrointestinal function. Serotonin imbalances can be associated with depression, anxiety, sleep disorders, and certain gastrointestinal or neuroendocrine conditions.
This test provides insight into neurochemical and systemic health, supporting the evaluation of both mental and physical well-being.
Purpose of the Test
- Assess serotonin levels for mood and mental health evaluation
- Support diagnosis and monitoring of depression, anxiety, or sleep disorders
- Evaluate gastrointestinal or neuroendocrine function
- Aid in detecting serotonin-producing tumors (e.g., carcinoid tumors)
- Guide treatment decisions related to psychotropic medications or dietary interventions
Who Should Consider This Test?
- Individuals experiencing depression, anxiety, or mood disturbances
- Patients with sleep problems, appetite changes, or gastrointestinal symptoms
- People with suspected serotonin-producing tumors
- Individuals undergoing treatment with SSRIs or other serotonin-modulating medications
- Patients seeking a comprehensive neurochemical or neurotransmitter assessment
What the Test Measures
- Serotonin Concentration in Blood:
- Indicates the amount of serotonin circulating in the bloodstream, which reflects both neurotransmitter activity and peripheral serotonin function.
Low serotonin levels may be linked to depression, anxiety, or sleep disturbances.
High serotonin levels may indicate certain endocrine or gastrointestinal conditions, or medication effects.
Fasting Required?
No fasting required.

