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The digestibility and accumulation of dietary phytosterols in Atlantic Salmon (Salmo salar L) smolt fed diets with replacement plant oils

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Miller, MR and Nichols, PD and Carter, CG (2008) The digestibility and accumulation of dietary phytosterols in Atlantic Salmon (Salmo salar L) smolt fed diets with replacement plant oils. Lipids, 43 (6). pp. 549-557. ISSN 0024-4201

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Abstract

Abstract Phytosterols occur in high concentration in
canola (Brassica napus L.) and other vegetable oils such as
from the borage plant Echium (Echium plantagineum L.).
We investigated if Atlantic salmon (Salmo salar) digest
and accumulate dietary phytosterols in significant amounts
in muscle and liver. Phytosterols are lipid soluble, lower
cholesterol and reduce the risk of coronary heart disease in
humans. We aimed to determine if fatty fish, such as salmon,
can be used as a delivery source of this functional
food component. Three diets containing canola oil (CO),
Echium oil (EO) and fish oil (FO) were fed to Atlantic
salmon smolt over 9 weeks. The digestibility of natural
abundances of phytosterols by Atlantic salmon was poor
compared to cholesterol. However, phytosterols accumulated
in liver and muscle of fish. Significantly increased
concentrations of 24-methylenecholesterol, campesterol, bsitosterol
and total phytosterol occurred in livers of EO fed
fish compared to FO fed fish. Campesterol concentrations
increased in CO fed fish compared to the FO fed fish. We
demonstrated that natural abundances of dietary phytosterols
are digested by and accumulated in liver and white
muscle of Atlantic salmon smolt. However, phytosterol
levels in salmon muscle will not be a major source of
phytosterols in human diets and would not be expected to
significantly effect human cardiovascular health.

Item Type: Article
Journal or Publication Title: Lipids
Page Range: pp. 549-557
ISSN: 0024-4201
Identification Number - DOI: 10.1007/s11745-008-3175-4
Additional Information:

The original publication is available at www.springerlink.com

Date Deposited: 07 Aug 2008 05:00
Last Modified: 18 Nov 2014 03:48
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