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Chemical and sensory analysis of strawberry flavoured yogurt supplemented with an algae oil emulsion

  • Celia P Chee (a1), Jason J Gallaher (a1), Darinka Djordjevic (a2), Habibollah Faraji (a2), D Julian McClements (a2), Eric A Decker (a2), Ruth Hollender (a1), Devin G Peterson (a1), Robert F Roberts (a1) and John N Coupland (a1)...


A yogurt mix (2 g fat and 17 g solids/100 g) was supplemented with an algae oil emulsion to provide 500 mg ω-3 fatty acids per 272 g serving of yogurt white mass. The emulsion was added to the yogurt mix either before or after the homogenization step and prior to pasteurization. It was then flavoured with a strawberry fruit base and fermented and stored for up to three weeks. The oxidative deterioration of the products was determined by hydroperoxide measurements and by trained and consumer sensory evaluations. The hydroperoxide content of the supplemented yogurts increased over the storage treatment and was unaffected by the stage of addition. The trained panel could distinguish a stronger fishy flavour in both of the supplemented yogurts after 22 days storage, but the consumer panel rated both control and supplemented samples similarly, as ‘moderately liked’.


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