At what age is the onset of Seasonal Affective Disorder most commonly estimated to begin?

• A. Under 18
• B. 18 to 30
• C. 30 to 50
• D. Over 50

Answer: (B)

Seasonal Affective Disorder (SAD) typically begins in young adulthood, with the most common onset occurring between the ages of 18 and 30. This age range aligns with periods of transition in life, such as moving out on their own, entering the workforce, or experiencing changes in social dynamics, which can contribute to mood fluctuations. Research has indicated that individuals in this demographic may be more susceptible to the environmental changes associated with seasonal variations, particularly decreased sunlight exposure in winter months.

While some younger individuals may experience symptoms, and SAD can manifest at various ages, the significant prevalence within the 18 to 30 age group highlights the importance of recognizing this disorder early in young adulthood when interventions may be most beneficial. Later age groups, while they can certainly be affected, show lower onset rates compared to this younger demographic.