Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

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Subject: search.filters.subject.Sensory evaluation

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    The effect of a 14-day Gymnema sylvestre intervention to reduce sugar intake in people self-identifying with a sweet tooth
    (Elsevier Ltd, 2025-01-28) Hsiao WH; Kruger R; Diako C; Nelson I; Stice E; Ali A
    Gymnema sylvestre (GS) contains gymnemic acids which can reversibly suppress sweet taste responses. This randomised crossover study aimed to investigate whether supplemental GS use can reduce sugar cravings, sweet food desire and consumption among adults that identify as high sweet food consumers (having a ‘sweet tooth’). Participants were told three different mints were trialled to avoid bias. On day zero, 32 healthy participants underwent baseline sensory testing for sweet taste perception using the placebo mint (PLAC). Participants were then randomised into the two intervention groups. On day 15 and 30, participants underwent further sensory testing using the GS mints, before embarking on each 14-day intervention using the GS mints, using either a systematic (at 3 specified times/day; SYS) or ad libitum (up to 6 mints/day at times of their choosing; AD-LIB) regimen, as assigned. On day 30, participants swapped over to the other intervention (using the other regimen), completing final data collection in day 45. At all visits participants completed questionnaires (food frequency questionnaire, beverage questionnaire and cravings questionnaire), anthropometric measures, and sensory testing. Sensory testing was not required for day 45. The AD-LIB condition reduced daily sugar-sweetened beverages (SSB) intake by 42% relative to PLAC (p = 0.015) and reduced overall sugar cravings by 28% relative to PLAC (p = 0.045). Both AD-LIB and SYS reduced pleasantness ratings (p < 0.005) and desire (p = 0.005) for more chocolate. Using GS with an ad libitum regimen reduced sugar cravings and changed sweet food desire and consumption in people identifying as having a sweet tooth.
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    Perception and acceptance of high seaweed content novel foods (Ulva spp. and Undaria pinnatifida) across New Zealand and Singaporean consumers
    (Elsevier BV, amsterdam, 2024-12) Chen A; Lim AJ; Lin JWX; Oh G; Teo PS; Bowie D; Deb-Choudhury S; Samuelsson LM; Chan JCY; Ng SB; Foster M; Giezenaar C; Hort J
    Edible seaweeds are gaining global popularity as nutritious and sustainable food sources, extending beyond Asian into Western diets. To investigate consumer perception and acceptance of high seaweed content foods, two novel products, seaweed dumplings and pasta, were developed using the mixture of Ulva spp. and Undaria pinnatifida as a primary ingredient. Consumer evaluations were conducted in New Zealand (NZ, n = 157) and Singapore (SG, n = 176). Results showed low overall liking and willingness to purchase for both products in each country, though NZ consumers rated them more positively in terms of liking, healthiness and sustainability than SG consumers. Willingness to purchase was positively correlated with ratings of liking, healthiness, and sustainability. Emotional responses differed by country and product, with more NZ participants reporting positive emotions (e.g., pleased, happy, hopeful and loving) and dumplings evoking more activate emotions (e.g., energetic, shocked and amazed). Umami taste enhanced overall liking in both countries, while slimy texture (NZ) and fish-like flavour (SG) decreased overall liking. These results underscore the current challenges in consumer acceptance of high seaweed content novel foods, but also highlight cross-cultural differences that can guide the development of seaweed-based foods in global markets.