Research conducted by Australian and Chinese scientists has found that circadian rhythms significantly influence consumer behavior, particularly in the evening. The study analyzed nearly 250,000 online shopping transactions, revealing that indulgent purchases, such as chocolate cake, increase notably after 7pm, peaking at 8pm. In a controlled experiment, participants asked about their shopping preferences at 8pm were 60% more likely to choose decadent items over healthier options compared to those questioned at 10am. The researchers concluded that this inclination towards hedonistic choices is not due to fatigue but rather a natural rise in psychological arousal that occurs in the evening. This heightened state enables consumers to justify indulgent purchases despite potential guilt. The findings, which shed light on the interplay between body clocks and consumer behavior, were published in the Journal of Retailing and Consumer Services.