Serotonin plays a big role on regulation mood swings, emotions, and appetite. With lack or low Serotonin levels, it plays a role on depression, anxiety, mania, and other physical and mental health conditions. 

Importance of Serotonin

A drug free way to stay happy is increasing exposure to sunlight. Our Circadian Rhythm includes expression of Serotonin during the day and Melatonin at night. When we wake up in the morning to sunlight, this signals our body that it is time to produce Serotonin since we start becoming awake and alert. Waking up to a rainy day now proposes the body that light has not come yet. Thereby Melatonin.

Light and Sunlight gives Happiness.

When Sunlight enters your eyes, it stimulates parts of the retina which then cues the brain to produce Serotonin. The more the brightness, the more it gets produced. 

Michigan State University

Very Often we had mood changes during particular weather patterns like Depression/Sadness during Rainy days and Happiness during sunny days. It does fall under Seasonal Affective Disorder (SAD) if diagnosed. Serotonin has been the mediator in treatment since a long time. A relationship does exist with normal seasonal variation and Serotonin.

Sunlight and Serotonin Takeover in the Brain  

Meesters, A. N., Schroevers, M. J., Stewart, R. E., Fleer, J., & Meesters, Y. (2022). Seasonal patterns in mindfulness in people with seasonal affective disorder (SAD). Journal of Affective Disorders Reports, 8, 100341. https://doi.org/10.1016/j.jadr.2022.100341

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