Dim Light at Night May Disrupt Daily Rhythms and Affect Metabolism, Reproduction, and Behavior in Female Rats

After 5 weeks of dim light at night exposure, oscillations in activity and body temperature of female Wistar rats are abolished.

• Dim light at night exposure leads to decreased nocturnal food intake, resulting in lower total food consumption.
• Significant decreases in melatonin levels are observed in rats exposed to dim light at night.
• Reproductive disruptions and decreased exploration times are noted in the affected rats.
• Marked anhedonia, or reduced pleasure-seeking behavior, is associated with the light exposure.
• The findings emphasize the need for further research on the effects of circadian disruptions in female populations.

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