Circadian Health Glossary
Seasonal Affective Disorder (SAD)
Seasonal Affective Disorder (SAD) is a type of depression that occurs during specific seasons, most commonly in the fall and winter months, when daylight hours are shorter. It is closely linked to disruptions in circadian rhythms caused by reduced exposure to sunlight.
What Are the Symptoms of SAD?
- Persistent feelings of sadness or low mood.
- Fatigue and low energy.
- Difficulty concentrating.
- Changes insleeppatterns (often increasedsleep).
- Increased appetite or cravings for carbohydrates.
What Causes SAD?
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Reduced Daylight Exposure: Disrupts the circadian clock, leading to mood and energy imbalances.
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Melatonin Overproduction: Longer periods of darkness can increase melatonin levels, causing drowsiness.
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Serotonin Deficiency: Less sunlight may lower serotonin levels, contributing to depressive symptoms.
How Is SAD Treated?
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Light Therapy: Bright light exposure, such as through light therapy devices, helps regulate the circadian rhythm and improve mood.
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Lifestyle Changes: Spending time outdoors, exercising, and maintaining a regular sleep schedule can alleviate symptoms.
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Professional Help: In severe cases, therapy or medication may be recommended.
SAD is a treatable condition, and understanding its connection to circadian health is key to managing and improving symptoms effectively.