Food security is essential for maintaining optimal nutritional habits, which involve both the quantity and quality of food consumed. Nutritional habits is one of the components in healthy lifestyle behaviour which described the nutritious food meets the dietary needs and food preferences for an active and healthy life. There has been little study into nutritional habits among married people. This study investigates the relationship between various factors—healthy lifestyle attitude (HLA), subjective norm (SN), perceived behavioural control (PBC), perceived severity (PSS), perceived benefits (PBE), and perceived barriers (PBA)—and the adoption of nutritional habits among married individuals in Peninsular Malaysia. It also explores the mediating effect of healthy lifestyle intention (HLI) on these relationships, aiming to identify the most influential factor. Data were collected from 409 married participants across four states using self-administered questionnaires and a multistage sampling technique. The results indicate that PBC, PSS, and PBA significantly correlate with nutritional habits, confirming several hypotheses. Additionally, both HLA and PBC strongly influence HLI, which in turn is positively related to nutritional habits. This research enhances the understanding of the factors influencing nutritional habits among married couples and provides valuable insights into improving dietary practices in this demographic.
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