Nelson Imogen, Kruger Rozanne, Hsiao David, Stice Eric, Ali Ajmol
School of Sport, Exercise and Nutrition, Massey University, Auckland 0632, New Zealand.
School of Health Sciences and Social Work, Griffith University, Gold Coast, QLD 4222, Australia.
Nutrients. 2025 Aug 22;17(17):2718. doi: 10.3390/nu17172718.
Excessive intake of sugar-sweetened food (SSF) increases obesity risk. Various psychological, physiological, and environmental factors may drive high consumption of SSF. Due to blocking sweet tastes, the herb Gymnema sylvestre (GS) has been shown to reduce SSF consumption, but its impact on motivation to eat SSF is unknown. This research aimed to qualitatively investigate adults' perceptions regarding effects of GS on their motivation to eat SSF when administered systematically (three times/day in-between meals, i.e., GS-SYS treatment) or ad libitum (up to six times/day at participants' discretion, i.e., GS-ADLIB) over 14 days, compared to placebo (taste-matched mint; PLAC-SYS). This study represents the qualitative investigation of a placebo-controlled randomised cross-over trial, conducted as three 14-day phases. The qualitative investigation included interviews at baseline and three post-testing phases. Seven participants (mean age 34.7 ± 13.8 years; two males, five females) agreed to participate. Twenty-eight interviews (across phases) were thematically analysed using NVivo software, identifying themes and highlighting changes in motivation to eat SSFs across the study. The GS-SYS and GS-ADLIB treatments made SSFs unpleasant to eat and increased mindful eating, subsequently increasing motivation to avoid SSFs. External factors could increase or decrease motivation, depending on individual circumstances. Participants preferred GS-SYS and GS-ADLIB over PLAC-SYS, feeling it was more effective at changing behaviours related to SSF intake. Self-control over SSF intake changed during the study, mostly due to external factors, and in part GS-ADLIB. : Participants found both GS administrations successful as motivation to avoid SSF; GS-ADLIB was considered most effective.
过量摄入含糖食品（SSF）会增加肥胖风险。各种心理、生理和环境因素可能导致人们大量食用SSF。由于匙羹藤（GS）能阻断甜味，已被证明可以减少SSF的摄入量，但其对食用SSF动机的影响尚不清楚。本研究旨在定性调查成年人在14天内系统服用（餐间每日三次，即GS-SYS治疗）或随意服用（参与者自行决定每日最多六次，即GS-ADLIB）GS后，对其食用SSF动机的看法，并与安慰剂（口味匹配的薄荷；PLAC-SYS）进行比较。本研究是一项安慰剂对照随机交叉试验的定性调查，分为三个14天的阶段进行。定性调查包括在基线和三个测试后阶段进行访谈。七名参与者（平均年龄34.7±13.8岁；两名男性，五名女性）同意参与。使用NVivo软件对28次访谈（跨阶段）进行了主题分析，确定了主题并突出了整个研究过程中食用SSF动机的变化。GS-SYS和GS-ADLIB治疗使SSF变得难吃，并增加了正念饮食，随后增加了避免食用SSF的动机。外部因素可能会增加或减少动机，这取决于个人情况。参与者更喜欢GS-SYS和GS-ADLIB，而不是PLAC-SYS，认为它在改变与SSF摄入相关的行为方面更有效。在研究过程中，对SSF摄入的自我控制发生了变化，主要是由于外部因素，部分是由于GS-ADLIB。参与者发现两种GS给药方式都成功地成为了避免食用SSF的动机；GS-ADLIB被认为是最有效的。
