26 Weeks' Dietary Supplementation With DHA- and EPA-enriched Oils on Sleep Efficiency in Healthy Adults

The purpose of this study is to investigate the effects of EPA- and DHA-enriched omega-3 polyunsaturated fatty acid dietary supplements on a number of objective sleep measures (collected from Activity watches) and subjective sleep measures (collected from the Leeds Sleep Evaluation Questionnaire) before and after 26 weeks of supplementation


Eligibility Criteria:
Inclusion Criteria:

* Aged 25 to 49 years inclusive
* Males and females
* Self-report of good health
* Sleeping pattern must include at least four consecutive nights per week that are the same

Exclusion Criteria

* English is not first language (some of the cognitive tasks have only been validated in native English speakers)
* Habitual consumption of oily fish exceeds one fish meal per week
* Habitual consumption of n-3 dietary supplements in the previous 6 months
* Habitual use of dietary supplements within the last month (defined as more than 3 consecutive days or 4 days in total; some supplements that do not impact upon cognitive function e.g. garlic, protein, calcium are allowed. Please check with the research team if you are unsure)
* Are a smoker or consume any nicotine replacement products (e.g. chewing gum, e-cigarettes)?
* Food allergies or sensitivities to any of the ingredients contained in the investigational product or any other foodstuff
* Pregnant, trying to get pregnant or breast feeding
* Body Mass Index outside of the range 18-35 kg/m2
* High blood pressure (systolic over 159 mm Hg or diastolic over 99 mm Hg)
* Currently taking blood pressure medication
* Currently taking blood thinning medication (e.g. aspirin, warfarin, heparin)
* Have a respiratory disorder that requires regular medication (Note: participants with asthma who only take their medication occasionally/as required are eligible for this study)
* Have frequent migraines that require medication (more than or equal to 1 per month)
* History or current diagnosis of drug/alcohol abuse
* History of kidney or liver disease, or other severe diseases of the gastrointestinal tract (e.g. iron accumulation, iron utilization disorders, hypercalcaemia, hypercalcaemia), that are likely to interfere with metabolism/absorption/secretion of the product under investigation
* History of neurological or psychiatric illness (excluding depressive illness and anxiety)
* History of head trauma
* Sleep disturbances and/or are taking sleep aid medication
* Blood disorders (e.g. anaemia, haemophilia, thrombocytosis)
* Diagnosis of type I or type II diabetes
* Heart disorder, or vascular illness
* Current diagnosis of depression and/or anxiety
* Over- or under-active thyroid
* Chronic gastrointestinal problems (e.g. Inflammatory Bowel Disease, Irritable Bowel Syndrome, celiac disease)
* Any known active infections
* Diagnosed with or may be at risk of having syphilis, hepatitis, the Human T - lymphotropic virus or the Human Immunodeficiency Virus
* Current or past breast cancer diagnosis and/or a mastectomy
* Health condition that would prevent fulfilment of the study requirements
* Currently participating in or in the past 4 weeks participated in other clinical or nutrition intervention studies