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  1. Serotonin: What Is It, Function & Levels - Cleveland Clinic

    Mar 18, 2022 · Serotonin is a chemical that carries messages between nerve cells in the brain and throughout your body. Serotonin plays a key role in such body functions as mood, sleep, …

  2. Physiology, Serotonin - StatPearls - NCBI Bookshelf

    Jul 30, 2023 · Serotonin, or 5-hydroxytryptamine (5-HT), is a neurotransmitter with an integral physiological role in the human body; it regulates various activities, including behavior, mood, …

  3. What Does Serotonin Do? Neurotransmitter Function

    Jun 18, 2025 · Serotonin is a neurotransmitter that regulates mood, sleep, appetite, and cognitive functions. Though primarily found in the intestines, its presence in the brain affects emotional …

  4. Everything You Need to Know About Serotonin - Verywell Mind

    Nov 7, 2025 · Serotonin is a neurotransmitter responsible for regulating mood, digestion, sleep, and more. Learn how serotonin functions and how to balance it.

  5. Serotonin - Wikipedia

    Serotonin (/ ˌsɛrəˈtoʊnɪn, ˌsɪərə -/) [6][7][8], also known as 5-hydroxytryptamine (5-HT), is a monoamine neurotransmitter with a wide range of functions in both the central nervous system …

  6. Serotonin: What High and Low Levels Mean - Healthline

    Jul 3, 2024 · Serotonin sends signals between nerve cells. It may help regulate many body functions, including mood, bowel movements, and sleep. Some medications help boost …

  7. Serotonin: The natural mood booster - Harvard Health

    Serotonin can stave off depression and provide a feeling a euphoria. When you feel happy and all seems right with the world, you're feeling the effects of serotonin.

  8. Serotonin: Normal and Abnormal Hormonal Function

    Sep 2, 2025 · Serotonin, also known as 5-hydroxytryptamine (5-HT), is a neurotransmitter (chemical messenger) that helps regulate various functions in the brain and body. …

  9. What Are Serotonin Hormones and How Do They Function?

    Serotonin is a versatile molecule that functions as both a neurotransmitter and a hormone. In the brain, it acts as a neurotransmitter, carrying signals directly between nerve cells, or neurons.

  10. Serotonin: Functions, deficiency, and how to boost

    Apr 18, 2024 · Serotonin is a natural chemical the intestines and brain produce. It helps send messages between nerve cells and affects mood, emotions, and digestion. The scientific …