According to studies, what percentage of SAD sufferers found relief from depressive symptoms using light therapy?

• A. 30%
• B. 60%
• C. 75%
• D. 90%

Answer: (B)

Light therapy has been shown to be an effective treatment for Seasonal Affective Disorder (SAD), a type of depression that typically occurs during the fall and winter months when natural light is limited. Research indicates that approximately 60% of individuals suffering from SAD experience significant relief from their depressive symptoms when utilizing light therapy. This efficacy stems from the exposure to bright artificial light, which can help regulate circadian rhythms and influence the production of neurotransmitters such as serotonin, which are often disrupted in those with SAD.

While higher percentages have been reported in some studies, they often refer to overall improvement in symptoms rather than complete relief. The 60% figure is a reliable benchmark based on multiple studies highlighting the effectiveness of light therapy as a primary treatment for SAD, making it a widely accepted understanding among professionals in the field.