How Jasmine May Help You Snooze Smarter

This study explores the effects of synthetic jasmine (Vertacetal Coeur) combined with lavender and passionflower on mild insomnia. It is hypothesized that exposure to these scents would improve sleep by increasing total sleep time (TST) and reducing wake after sleep onset (WASO), offering a natural, drug-free treatment option. Previous research suggests lavender improves sleep, but synthetic scents' benefits remain underexplored, highlighting the significance of this research given the potential consequences of poor sleep, like depression.

Figure 1 illustrates the impact of scent exposure (independent variable) on sleep parameters (dependent variables) including quality, TST, Sleep Onset Latency (SOL), and WASO across baseline (no scent), placebo (rose scent), and jasmine scent conditions, measured in minutes. The data reveal that jasmine scent increased TST and reduced WASO compared to the baseline and placebo, suggesting improved sleep quality. The standard difference reported across these conditions shows that the effects were the same for all participants. This supports the idea that scent therapy, especially with jasmine, can be an effective way to improve sleep that doesn't involve drugs.

Figure 2 presents a box plot that measures the sleepiness that participants felt each morning, as measured by the Karolinska Sleepiness Scale (KSS). The participants used the scented conditions (baseline, placebo, low-dose VC, and high-dose VC) to rate how sleepy they felt (dependent variables), assuming that the study's design, participant routines, and sleep patterns did not change (control variables). The baseline showed the highest sleepiness scores, indicating poor sleep quality. Each of the three scented conditions had similar ratings, indicating that none of the scents improved subjective wakefulness, and despite reducing WASO, the jasmine scent did not improve how well-rested participants felt upon waking.

Figure 3 presents participant ratings of scent intensity, pleasantness, and intrusiveness in a sleep study. The independent variable was the type of scent (placebo, low-dose VC, high-dose VC), while the dependent variables were the perception ratings. Control variables included standardized rating collection and blinding participants to scent type. The findings showed no significant differences in intensity or intrusiveness, but participants preferred the low-dose jasmine scent over the high-dose version. Only 7–8% reported mild side effects, such as headaches. These results suggest that lower concentrations of jasmine may be more suitable for scent-based sleep aids, highlighting the importance of user preference in developing effective aromatherapy interventions.

The study found that synthetic jasmine scent improves sleep quality by reducing wake after sleep onset (WASO). Figure 1 showed that it did affect total sleep time (TST). Similarly, Figure 2 shows improved objective sleep parameters. Figure 3 shows participants preferred the lower-dose jasmine scent, suggesting concentration affects perception and effectiveness. However, despite reducing WASO, the scent did not improve wakefulness, emphasizing the need to align objective benefits with subjective experience. Future research should explore long-term effects, home environment testing, and scent combinations. Investigating jasmine’s interaction with the GABAergic system could further clarify its anxiolytic and sleep-promoting properties.

Spahn, L., Rosenblum, L., Penzel, T., Lederer, K., Salanitro, M., & Fietze, I. (2022). The

Influence of Scent on Sleep Quality. Journal of Biomedical Research & Environmental Sciences. 3(10): 1146-1151. 10.37871.