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Effects of a Mediterranean-style diet and fish oil supplements on mood and health

Investigating the effects of a Mediterranean-style diet and fish oil supplement intervention on lifestyle behaviour change and on mental and cardiometabolic health in people with self-reported depressive symptoms: A 6-month randomised controlled trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12614000438651
Acronym
HELFIMED (Healthy Eating for Life with a Mediterranean-style diet) Mood Study
Enrollment
164
Registered
2014-04-23
Start date
2014-04-23
Completion date
2015-06-15
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

This project aims to investigate (1) the effectiveness of the HELFIMED protocol for improving dietary behaviours and nutrition status of people with self-reported depression; (2) the mental health benefits of improved diet/nutrition status and (3) the cardiometabolic benefits of improved diet/nutrition status.

Interventions

Participants will be randomly allocated to an intervention or control condition. The intervention group will receive fortnightly food hampers (containing extra virgin olive oil, seasonal fruit/vegetables - approx 2 fruits and 5 vegetables - and nuts) plus 2-hour fortnightly cooking workshops (using selected simple tasty affordable recipes based on Mediterranean diet principles) for 3 months. They will receive fish oil capsules (2/day containing a total of 1g DHA+EPA) for 6 months, commencing at

Participants will be randomly allocated to an intervention or control condition. The intervention group will receive fortnightly food hampers (containing extra virgin olive oil, seasonal fruit/vegetables - approx 2 fruits and 5 vegetables - and nuts) plus 2-hour fortnightly cooking workshops (using selected simple tasty affordable recipes based on Mediterranean diet principles) for 3 months. They will receive fish oil capsules (2/day containing a total of 1g DHA+EPA) for 6 months, commencing at baseline. They will also receive a 2-hour group nutrition education session following baseline assessments designed in consultation with a dietitian and delivered by nutritionists, and recipe folders containing simple healthy tasty affordable meals based on Mediterranean-style dietary principles. Compliance will be measured by 3-day food diaries (at 3 and 6 months), return of fish oil capsule containers and PUFA blood sample analysis.

Sponsors

University of South Australia
Lead SponsorUniversity

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

Diet quality score indicative of poor diet, adapted from previous scores. Self-reported depressive symptoms.

Exclusion criteria

Currently undertaking any other research Currently taking any fish oil supplements or any in the past 2 months. Pregnancy Commencement of new psychotherapy or pharmacotherapy within the preceding fortnight Severe food allergies, intolerances or aversions Current participation in an intervention targeting diet or exercise Primary clinical diagnosis of a personality disorder A current substance use disorder.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026