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Investigating the effects of a high DHA fish oil supplement on cognitive performance in older adults with Mild Cognitive Impairment: A 12-month randomised, double-blind, placebo controlled trial based in Wellington, New Zealand

In older adults with mild cognitive impairment, do omega-3 fatty acids compared to a placebo improve cognitive performance?

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12614000874617
Enrollment
72
Registered
2014-08-14
Start date
2015-12-01
Completion date
2016-05-31
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

Study design: 12-month randomised, double-blind, placebo-controlled intervention trial with 4 measurement points. Participants: 72 men & women, aged 60-90 years with Mild Cognitive Impairment. Intervention: Half the participants will receive fish-oil capsules and the other half will receive placebo capsules for 12 months. Outcome measures: cognitive performance, well-being, blood pressure and weight. Demographic and nutritional data will be collected as covariates.

Interventions

12 month intervention of 1500 mg of docosahexaenoic acid (DHA) and 300 mg of eicosapentaenoic acid (EPA) per day. Participants will take 3 x 500mg of DHA+100mg of EPA capsules in the morning with breakfast every day for 12 months. Participants will be given 4 bottles of capsules (each containing 200 capsules) at the end of the baseline testing session, another bottle at the end of the 2nd session and the final bottle at the end of the 3rd testing session. Participants will be required to return

12 month intervention of 1500 mg of docosahexaenoic acid (DHA) and 300 mg of eicosapentaenoic acid (EPA) per day. Participants will take 3 x 500mg of DHA+100mg of EPA capsules in the morning with breakfast every day for 12 months. Participants will be given 4 bottles of capsules (each containing 200 capsules) at the end of the baseline testing session, another bottle at the end of the 2nd session and the final bottle at the end of the 3rd testing session. Participants will be required to return the capsule bottles with all unused capsules to the following testing sessions.

Sponsors

Alexia Mengelberg
Lead SponsorIndividual

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject, Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender
All
Age
60 Years to 90 Years
Healthy volunteers
No

Inclusion criteria

Inclusion criteria for participants will be a diagnosis of cognitive impairment based on neuropsychological assessment and self-reporting. Agree to not start taking own fish oil supplement during the 12-month trial. .

Exclusion criteria

Major medical conditions including head injury or recent major surgery, problem swallowing capsules, consumption of 3 more more servings of oily fish per week, consumption of fish oil supplements in the last 12 months and an allergy to fish or seafood.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026