It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small 😎
❝I saw an advert on the subway for a pillow spray that guarantees a perfect night’s sleep. What does the science say about smells/sleep?❞
That is certainly a bold claim! Unless it’s contingent, e.g. “…or your money back”. Because otherwise, it absolutely cannot guarantee that.
There is some merit:
❝Odors can modulate the latency to sleep onset, as well as the quality and duration of sleep. Olfactory modulation of sleep may be mediated by direct synaptic interaction between the olfactory system and sleep control nuclei, and/or indirectly through odor modulation of arousal and respiration.
Such modulation appears most heavily influenced by past associations and expectations about the odor, beyond any potential direct physicochemical effect❞
Source: Reciprocal relationships between sleep and smell
Translating that from sciencese:
Sometimes we find pleasant smells relaxing, and placebo effect also helps.
That “any potential direct physiochemical effect”, though, when it does occur, is things like this…
Read: Odor blocking of stress hormone responses
…but that’s a mouse study, and those odors may only work to block three specific mouse stress responses to three specific stressors: physical restraint, predator odor, and male–male confrontation.
In other words: if, perchance, those three things are not what’s stressing you in bed at night (we won’t make assumptions), and/or you are not a mouse, it may not help.
(and this, dear readers, is why we must read articles, and not just headlines!)
But! If you are going to go for a pillow fragrance, something well-associated with being relaxing and soporific, such as lavender, is the way to go:
- Effects of aromatherapy on sleep quality and anxiety of patients
- Effects of Aromatherapy on the Anxiety, Vital Signs, and Sleep Quality of Percutaneous Coronary Intervention Patients in Intensive Care Units
- Effect of lavender aromatherapy on vital signs and perceived quality of sleep in the intermediate care unit: a pilot study
tl;dr = patients found lavender fragrances relaxing, experienced less anxiety, got better sleep (significantly or insignificantly, depending on the study) and enjoyed lower blood pressure (significantly or insignificantly, depending on the study).
PS: this writer uses a pillow spray like this one 💤
Enjoy!
