Acceptance and likelihood of purchasing vitamin D-fortified foods among Irish adults aged 18–65 years: A consumer study with conjoint analysis

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dc.contributor.authorMcGuinness, Lauren
dc.contributor.authorMcCarthy, Mary
dc.contributor.authorKiely, Mairead E.
dc.contributor.authorMcCarthy, Sinéad N.
dc.contributor.funderDepartment of Agriculture, Food and the Marine
dc.date.accessioned2026-07-14T08:50:03Z
dc.date.available2026-07-14T08:50:03Z
dc.date.issued2026-07-04
dc.description.abstractMeeting recommendations for vitamin D is challenging due to limited food sources. Strategic fortification has been shown to prevent low vitamin D status. Using an online survey of Irish adults (n = 1008), this study assessed awareness of vitamin D deficiency, attitudes to fortification, cues-to-action and intention to consume vitamin D-fortified foods using a 7-point scale. Current consumption of supplements and fortified foods was assessed. Willingness to purchase vitamin D fortified foods was evaluated using a 9-point scale with the following attributes: food vehicle (i.e., bread, cereal, milk), fortification level (no information, with vitamin D and with vitamin D and health claim) and price, using conjoint analysis. Conjoint analysis indicated that the food vehicle (importance = 40.6%) and claim (38.3%) exerted greater influence on purchase decisions than price (20.8%). Bread generated the highest part-worth utility (0.204), yoghurt was approximately neutral (0.039) and breakfast cereal the least preferred (−0.244), a simple ‘with vitamin D' label produced a positive utility (0.177). Respondents grouped into four segments: Supplements and fortified food users (S&FF) (n = 595, 59.0%), supplements only (SO) (n = 161, 16.0%), fortified food only (FFO) (n = 145, 14.4%), non-users (NU) (n = 107, 10.6%). S&FF reported the highest positive attitudes (mean 5.6 ± 0.9), awareness (mean 5.6 ± 0.8) and intention to consume fortified foods (mean 5.2 ± 1.1), NU had lower awareness (5.2 ± 0.8) and intention (4.1 ± 1.3) but responded positively to cues to action such as health professional and family recommendations. Therefore, leveraging trusted health professionals and family-mediated cues to reach low-engagement groups could increase vitamin D intake.en
dc.description.sponsorshipDepartment of Agriculture, Food and the Marine, Ireland|2021R610
dc.description.versionPublished Version
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid106038
dc.identifier.authororcidMcGuinness, Lauren
dc.identifier.authororcidMcCarthy, Mary§0000-0001-5383-738X
dc.identifier.authororcidKiely, Mairead E.§0000-0003-0973-808X
dc.identifier.authororcidMcCarthy, Sinéad N.
dc.identifier.citationMcGuinness, L, McCarthy, M, Kiely, M E & McCarthy, S N 2026, 'Acceptance and likelihood of purchasing vitamin D-fortified foods among Irish adults aged 18–65 years: A consumer study with conjoint analysis', Food Quality and Preference, vol. 145, 106038, pp. 1-12. https://doi.org/10.1016/j.foodqual.2026.106038
dc.identifier.doi10.1016/j.foodqual.2026.106038
dc.identifier.endpage12
dc.identifier.issn0950-3293
dc.identifier.journaltitleFood Quality and Preference
dc.identifier.othercrossref: 10.1016/j.foodqual.2026.106038
dc.identifier.otherORCID: /0000-0001-5383-738X/work/220716407
dc.identifier.otherORCID: /0000-0003-0973-808X/work/220716448
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/19063
dc.identifier.volume145
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.urihttps://www.scopus.com/pages/publications/105043750281
dc.rights© 2026, the Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ).
dc.rights.accessrightsopen access
dc.rights.licensenameAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.statusPeer reviewed
dc.subjectConsumer acceptance
dc.subjectFortification
dc.subjectHealth behaviour
dc.subjectPublic health
dc.subjectVitamin D
dc.subject[CUBS]
dc.subject[FoodNutritionalSciences]
dc.subject[INFANT]
dc.titleAcceptance and likelihood of purchasing vitamin D-fortified foods among Irish adults aged 18–65 years: A consumer study with conjoint analysisen
dc.typeArticle (peer-reviewed)
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