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This study aims to determine the effect of health knowledge on nutrition-label use and attitude, and consequently on healthy food choice among Malaysian Muslim consumers.

This study adopts the positivist, deductive and quantitative approach. A sample consisting of 257 Muslim consumers, at least 15 years old, were selected using systematic street-intercept sampling method. Data collected using a self-administered questionnaire were analysed using descriptive statistics and structural equation modelling (SEM).

The findings reveal the significant positive effect of health knowledge on nutrition-label use and attitude towards nutrition label, but only attitude towards nutrition label significantly predicts healthy food choice.

Though the findings add to the existing literature, provide useful information on how nutrition label could guide the consumer to make healthier food choices and serve as a reference point that could stimulate and guide future researchers and other relevant parties, this study is limited by several factors that require replication in future research.

This research is perhaps one of the first attempts to consider the role of nutrition label as one of the ways to comply with the Tayyib principle.

Managing trust recovery in case of violation of halal products should be seen in light of the severity of violation as perceived by the consumer. This study aims to investigate how the severity of violation on halal directly impact negative consumer behavior (avoidance, boycott and revenge), and its moderating effect on the relationship between trust recovery and avoidance, boycott and revenge.

In total, 212 questionnaires were distributed amongst customers who were aware and/or had experienced the violation of a halal product in Klang Valley, Malaysia – each of whom were selected using convenience sampling methods. Data were analyzed using descriptive statistics and structural equation modelling techniques, were partial least squares (PLS) software was used to measure the direct and indirect relationships between the variables.

The results of this investigation showed that trust recovery and negative consumer behavior are negatively related; severity is positively related to avoidance, boycott and revenge; and severity moderates the relationship between trust recovery and avoidance.

Empirically, it was found that severity and trust recovery are a significant component that influence negative consumption behavior. This study has significant implications alongside research implications despite some limitations.

In a severe violation case, a company needs to ensure that the strategy to fix the problem is genuine and trustworthy, as consumer trust on the recovery action by company is significance to influence customer avoidance in consuming the company’s product.

The uniqueness of this study exists in the fact that it is the first known one to concentrate on halal violation and examine the moderating effect of severity of halal violation on the relationship between trust recovery and negative consumer behaviors (avoidance, boycott and revenge).