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N-3 fatty acids in diets for weight loss

Is a higher intake of omega-3 fatty acids advantageous for weight loss for overweight and obesity?

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12608000425392
Enrollment
90
Registered
2008-08-26
Start date
2008-07-08
Completion date
2009-02-26
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 study aims to demonstrate that, in the long term, a hypocaloric diet supplemented with long chain polyunsaturated fat (LC PUFA) will be more beneficial for weight loss than a control hypocaloric diet for overweight individuals. Outcomes will be compared in those receiving general hypocaloric dietary advice with those receiving the same advice but inclusive of 180g fish/week and LC PUFA (fish oil) supplements. We hypothesise that the intervention will produce positive outcomes for cardiovascular disease risk factors Potential mechanisms for the effect of the diet will be investigated

Interventions

1. Hypocaloric diet for 12 months +daily placebo capsules (1g olive oil) 2. Hypocaloric diet inclusive of 180gfish/week +daily placebo capsules (1g olive oil) 3. 2. Hypocaloric diet inclusive of 180gfish/week + oral fish oil capsules comprising 630 mg/day Long Chain polyunstaurated fatty acids (PUFA) (420 mg Eicosapentaenoic acid (EPA)+ 210 mg docosahexanoic acid (DHA) (Blackmore’s Promega Heart) daily for 12 months. Dietary intervention comprises dietary education and follow-up provided by a

1. Hypocaloric diet for 12 months +daily placebo capsules (1g olive oil) 2. Hypocaloric diet inclusive of 180gfish/week +daily placebo capsules (1g olive oil) 3. 2. Hypocaloric diet inclusive of 180gfish/week + oral fish oil capsules comprising 630 mg/day Long Chain polyunstaurated fatty acids (PUFA) (420 mg Eicosapentaenoic acid (EPA)+ 210 mg docosahexanoic acid (DHA) (Blackmore’s Promega Heart) daily for 12 months. Dietary intervention comprises dietary education and follow-up provided by a dietitian. The first dietary counselling session is 1 hour and follow up sessions comprise 30 minutes. There are monthly consultations for the first 3 months, followed by 3-monthly consultations (ie at 6,9, and 12 months of follow-up).

Sponsors

University of Wollongong
Lead SponsorUniversity

Study design

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

Eligibility

Sex/Gender
All
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

Overweight or obese Body Mass Index (BMI) >25 and =< 37 kg/m2

Exclusion criteria

Major illnesses, diabetes mellitus, Low density lipoprotein (LDL) > 6 mmol/l, food allergies or habits inhibiting compliance, illiteracy and inadequate conversational English, inability to undertake study requirements, taking fish oil supplements, pregnancy/lactation, not weight stable for past six months (within 3kg), or on a weight-reducing diet

Outcome results

None listed

Source: ANZCTR · Data processed: Mar 21, 2026