Serotonin Blood Test

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Feature	Labcorp	Quest Diagnostics
Price	$89.99	$89.99
Results in	~5 business days	~5 business days
Sample type	Blood Serum	Blood Serum
Require fasting	No	No

About the test

Serotonin is a neurotransmitter involved in mood regulation, digestion, and sleep. It is primarily measured to evaluate for serotonin-producing tumors such as carcinoid tumors, or to investigate symptoms related to serotonin imbalance.

Included biomarkers & Reference ranges

Biomarker	Reference range
Serotonin Measures serotonin, a neurotransmitter and hormone; blood levels are used mainly to help evaluate carcinoid tumors rather than mood.	—

Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.

Preparation

Avoid taking monoamine oxidase inhibitor drugs for at least one week before your blood draw. DO NOT discontinue any prescription medications without first consulting your healthcare provider.

Avoid the following foods for 3 days before sample collection:
Tobacco
Tea
Coffee
Food high in indoles
Avocado
Banana
Tomato
Plum
Walnut
Pineapple
Eggplant

How it works

1. Order online No referral or insurance
2. Get a requisition By email in 24–72 hours
3. Visit a draw center Bring a matching photo ID
4. Get results Securely by email

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Consultations

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

Book a specialist