female human 9 adult 8 article 6 controlled study 6 male 6 Humans 5 questionnaire 5 human experiment 4 major clinical study 4 Article 3 purchasing 3 Adult 2 Consumer preferences 2 Female 2 Male 2 Middle Aged 2 aged 2 comparative study 2 consumer 2 consumer attitude 2 demography 2 diet 2 economic development 2 food packaging 2 food preference 2 household 2 marketing 2 middle aged 2 outcome assessment 2