The nutritional and cardiovascular health benefits of rapeseed oil-fed farmed salmon in humans are not decreased compared with those of traditionally farmed salmon: a randomized controlled trial.

de Roos, Baukje; Wood, Sharon; Bremner, David; Bashir, Shabina; Betancor, Monica B.; Fraser, William D.; Duthie, Susan J.; Horgan, Graham W.; Sneddon, Alan A.

Abstract

Purpose: Farmed fish are increasingly raised on feeds containing vegetable oils, which affects their composition and possibly health properties. We investigated the effects of consuming farmed salmon, raised on different feeding regimes, on nutrient status and health outcomes in healthy subjects. Methods: Salmon were grown on feeds containing mainly fish oil (FO) or rapeseed oil (RO), resulting in an eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) content of fillets of 2.1 or 0.9 g/100 g, respectively. In a randomized parallel controlled trial, 51 healthy subjects were allocated to consume 2 portions/week of FO salmon (n = 17), RO salmon (n = 17) or no additional salmon (Control,n = 17) as part of their habitual diet, for 18 weeks. We collected blood at 0, 9 and 18 weeks to measure omega-3 index (O3I) in red blood cells, plasma markers of cardiovascular risk, serum 25(OH)-vitamin D-3(25(OH)D-3) and plasma trace elements. Results: After 18 weeks, O3I was similarly increased in subjects consuming 2 portions/week of FO or RO salmon compared to control (bothp < 0.05). Serum 25(OH)D(3)was significantly higher, whereas plasma triacylglycerols were significantly lower in subjects consuming RO salmon compared to control (bothp < 0.05). Heart rate was significantly lower in subjects consuming FO salmon after 9 weeks, compared to control (p < 0.01). Salmon consumption did not affect other markers. Conclusion: Consuming two portions/week of salmon raised on rapeseed oil rather than fish oil increased the O3I and vitamin D status, and decreased plasma triacylglycerols. These outcomes endorse opportunities for developing more sustainable feeds within aquaculture food systems.

Citation

DE ROOS, B., WOOD, S., BREMNER, D., BASHIR, S., BETANCOR, M.B., FRASER, W.D., DUTHIE, S.J., HORGAN, G.W. and SNEDDON, A.A. 2021. The nutritional and cardiovascular health benefits of rapeseed oil-fed farmed salmon in humans are not decreased compared with those of traditionally farmed salmon: a randomized controlled trial. European journal of nutrition [online], 60(4), pages 2063-2075. Available from: https://doi.org/10.1007/s00394-020-02396-w

• Journal Article Type: Article
• Acceptance Date: Sep 23, 2020
• Online Publication Date: Oct 5, 2020
• Publication Date: Jun 30, 2021
• Deposit Date: Oct 23, 2020
• Publicly Available Date: Oct 23, 2020
• Journal: European journal of nutrition
• Print ISSN: 1436-6207
• Electronic ISSN: 1436-6215
• Publisher: Springer
• Peer Reviewed: Peer Reviewed
• Volume: 60
• Issue: 4
• Pages: 2063-2075
• DOI: https://doi.org/10.1007/s00394-020-02396-w
• Keywords: Farmed fish; Fish feeds; Cardiovascular health; Omega-3 index; Vitamin D; Micronutrients
• Public URL: https://rgu-repository.worktribe.com/output/977780