Clinical trial NCT03158545: 26 Weeks' Dietary Supplementation With DHA- and EPA-enriched Oils on Cerebral Blood Flow in Healthy Adults
Official title: Efficacy Evaluation of 26 Weeks' Dietary Supplementation With DHA- and EPA-enriched Oils on Cerebral Blood Flow in Healthy Adults
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Neurovascular Coupling
Lead sponsor: Northumbria University
Sponsor class: OTHER
Collaborators: name: Pronova BioPharma
First posted: 2017-05-18
Enrollment: 78
Sex: ALL
Minimum age (years): 25
Maximum age (years): 49
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief summary: The purpose of this study is to investigate the effects of EPA- and DHA-enriched omega-3 polyunsaturated fatty acid dietary supplements on cerebral blood flow during a series of cognitive, mathematical subtraction tasks and subjective ratings of task difficulty 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

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 (see Appendix I)
* Habitual consumption of omega-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 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

Primary outcomes:
measure: Cerebral Blood Flow
timeFrame: Participants are assessed pre and post 6 months of supplementation
Secondary outcomes:
measure: Cognitive Performance
timeFrame: Participants are assessed pre and post 6 months of supplementation
measure: Subjective Task Difficulty
timeFrame: Participants are assessed pre and post 6 months of supplementation
Other outcomes:
Locations:
city: Newcastle upon Tyne
country: United Kingdom
facility: Northumbria University
state: Tyne and Wear
Study officials:
affiliation: Northumbria University
name: Philippa Jackson, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Patan MJ, Kennedy DO, Husberg C, Hustvedt SO, Calder PC, Khan J, Forster J, Jackson PA. Supplementation with oil rich in eicosapentaenoic acid, but not in docosahexaenoic acid, improves global cognitive function in healthy, young adults: results from randomized controlled trials. Am J Clin Nutr. 2021 Sep 1;114(3):914-924. doi: 10.1093/ajcn/nqab174.