About this trial
This will be a double-blind, placebo-controlled, parallel-group trial. Participants who are poor sleepers will be randomised to receive one of two investigational supplements, or a placebo control supplement, over a 28-day period. At baseline and following 28 days of consumption, sleep quality, gut microbiome profiles, cognitive performance, and mood will be assessed. Sleep outcome measures will also be assessed throughout the supplementation period to monitor the time course of any observed changes. A final data set of at least 66 participants is expected.
Eligibility criteria
Qualifiers
Participants must self-assess themselves as being in good health.
Aged 25 to 60 years at the time of randomisation
Fluent in English
Identify as a 'poor sleeper' as defined subjectively (i.e. poor sleep quality, unrefreshing sleep) and a total score of >5 on the Pittsburgh Sleep Quality Index (PSQI).
Disqualifiers
Member of own household currently participating in this trial
Evidence of current or recent sleep disorders (e.g. sleep apnoea, insomnia, circadian rhythm disorders), taking any medication which exerts sedative effects, affects the CNS and/or sleep, or be currently unwell with any illness that affects sleep (i.e. disorders of the CNS). An initial screening for sleep disorders will be conducted using the Sleep Disorders Symptom Checklist-25 (SDS-CL; Klingman et al., 2017). If a participant reports positively to any of the 25 questions in terms of being affected for three nights per week, or more, this will be followed up using a clinical interview according to the International Classification of Sleep Disorders (ICSD-3) to exclude on the basis of a sleep disorder
History of seizures or epilepsy
Shift working or have a history of shift work within the previous six months
Trial design
Treatments tested in this trial
- Proprietary 'active' composition 1
- Proprietary 'active' composition 2
- Inactive control supplement