ArticleScientific reports2015
Fish oil supplements in New Zealand are highly oxidised and do not meet label content of n-3 PUFA.
Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 66 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
66 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Are There Benefits from the Use of Fish Oil Supplements in Athletes? A Systematic Review.Advances in nutrition (Bethesda, Md.) · 2020Pooled it
- Potential Adverse Public Health Effects Afforded by the Ingestion of Dietary Lipid Oxidation Product Toxins: Significance of Fried Food Sources.Nutrients · 2020Pooled it
- EPA and DHA inhibit LDL-induced upregulation of human adipose tissue NLRP3 inflammasome/IL-1β pathway and its association with diabetes risk factors.Scientific reports · 2024Trial
- Statin dose reduction with complementary diet therapy: A pilot study of personalized medicine.Molecular metabolism · 2018Trial
- Production and encapsulation of eicosapentaenoic acid (EPA)‑rich lipid extract from Phaeodactylum tricornutum under different cultivation conditions.World journal of microbiology & biotechnology · 2026Article
- The association between omega-3 supplementation and cognitive decline in older adults.The journal of prevention of Alzheimer's disease · 2026Article
- Fish oil supplements in patients with chronic kidney disease.Clinical kidney journal · 2026Review
- Advancing the Analysis of Fatty Acid Composition in Animal-Based Marine Oils Through the Integration of Raman and IR Spectroscopy with Chemometrics.Foods (Basel, Switzerland) · 2026Article
- A Comprehensive Study via Proton Nuclear Magnetic Resonance of a Variety of Omega-3 Lipid-Rich Supplements Available in the Spanish Market: Acyl Group Profile, Minor Components, and Oxidative Status.Foods (Basel, Switzerland) · 2025Article
- Eicosapentaenoic acid limits the more rapid oxidation of lipoprotein(a) compared with other apolipoprotein B particles.Cardiovascular research · 2025Article
- The Role of Omega-3 and Omega-6 Polyunsaturated Fatty Acid Supplementation in Human Health.Foods (Basel, Switzerland) · 2025Review
- Mass spectrometry unveils heat-induced changes in yolk oxylipins and key lipid molecules during home cooking.Journal of advanced research · 2025Article
- Systematically Investigating the Qualities of Commercial Encapsulated and Industrial-Grade Bulk Fish Oils in the Chinese Market.Foods (Basel, Switzerland) · 2025Article
- Oxidized Polyunsaturated Fatty Acid Promotes Colitis and Colitis-Associated Tumorigenesis in Mice.Journal of Crohn's & colitis · 2025Article
- Microencapsulation of fish oil by spray-drying using two different wall materials: a comparison.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologica · 2025Article
- Associations of fish oil with cardiovascular disease events: results from the Taiwan longitudinal study in aging.BMC public health · 2024Article
- Nutraceutical prospects of genetically engineered cyanobacteria- technological updates and significance.World journal of microbiology & biotechnology · 2024Review
- Do patients benefit from omega-3 fatty acids?Cardiovascular research · 2024Review
- New Insights into Prospective Health Potential of ω-3 PUFAs.Current nutrition reports · 2023Review
- Synthesis of lipoic acid ferulate and evaluation of its ability to preserve fish oil from oxidation during accelerated storage.Food chemistry: X · 2023Article
6 more citing papers are in PubMed but not listed here.
Corrections and comments
- Erratum issued
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We evaluated the quality and content of fish oil supplements in New Zealand. All encapsulated fish oil supplements marketed in New Zealand were eligible for inclusion. Fatty acid content was measured by gas chromatography. Peroxide values (PV) and anisidine values (AV) were measured, and total oxidation values (Totox) calculated. Only 3 of 32 fish oil supplements contained quantities of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) that were equal or higher than labelled content, with most products tested (69%) containing <67%. The vast majority of supplements exceeded recommended levels of oxidation markers. 83% products exceeded the recommended PV levels, 25% exceeded AV thresholds, and 50% exceeded recommended Totox levels. Only 8% met the international recommendations, not exceeding any of these indices. Almost all fish oil supplements available in the New Zealand market contain concentrations of EPA and DHA considerably lower than claimed by labels. Importantly, the majority of supplements tested exceeded the recommended indices of oxidative markers. Surprisingly, best-before date, cost, country of origin, and exclusivity were all poor markers of supplement quality.
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