Limits...
Fish oil supplements in New Zealand are highly oxidised and do not meet label content of n-3 PUFA.

Albert BB, Derraik JG, Cameron-Smith D, Hofman PL, Tumanov S, Villas-Boas SG, Garg ML, Cutfield WS - Sci Rep (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Liggins Institute, University of Auckland, Auckland, New Zealand.

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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The content of oxidation markers in retail fish oil tested in relation to recommended international thresholds (dotted lines).
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f2: The content of oxidation markers in retail fish oil tested in relation to recommended international thresholds (dotted lines).

Mentions: There were high levels of oxidation in the fish oils assessed (Table 1), with the vast majority of supplements tested failing to meet recommended levels of oxidation markers (Figure 2). 30/36 (83%) products exceeded the recommended PV, 9/36 (25%) exceeded AV, and 18/36 (50%) exceeded recommended Totox thresholds (Figure 2). Only 3 of 36 oils tested (8%) met all the international recommendations, not exceeding any of these indices (Figure 2). After adjustment for concentration, only 19% (7/36) were within the recommended limits, indicating that the high frequency of excess oxidation was not simply an artefact caused by the concentrated oils.


Fish oil supplements in New Zealand are highly oxidised and do not meet label content of n-3 PUFA.

Albert BB, Derraik JG, Cameron-Smith D, Hofman PL, Tumanov S, Villas-Boas SG, Garg ML, Cutfield WS - Sci Rep (2015)

The content of oxidation markers in retail fish oil tested in relation to recommended international thresholds (dotted lines).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4300506&req=5

f2: The content of oxidation markers in retail fish oil tested in relation to recommended international thresholds (dotted lines).
Mentions: There were high levels of oxidation in the fish oils assessed (Table 1), with the vast majority of supplements tested failing to meet recommended levels of oxidation markers (Figure 2). 30/36 (83%) products exceeded the recommended PV, 9/36 (25%) exceeded AV, and 18/36 (50%) exceeded recommended Totox thresholds (Figure 2). Only 3 of 36 oils tested (8%) met all the international recommendations, not exceeding any of these indices (Figure 2). After adjustment for concentration, only 19% (7/36) were within the recommended limits, indicating that the high frequency of excess oxidation was not simply an artefact caused by the concentrated oils.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Liggins Institute, University of Auckland, Auckland, New Zealand.

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.

Show MeSH