OBJECTIVES: Malnutrition (i.e. under-nutrition and over-nutrition) is among the top healthcare issues that can be fatal if proper nutrition-care is not provided by healthcare providers. Until now this problem is equally affecting adults as well as children because of healthcare providers’ inadequate knowledge, poor attitudes and inappropriate practices (closely monitoring patients’ health status and regularly reviewing their treatment plan to make sure patients’ nutritional needs are being met). The aim of this KAP study was to evaluate the knowledge, attitudes, and practices of healthcare providers (doctors, pharmacists and nurses) towards nutrition support in a tertiary care hospital in Pakistan. METHODS: A cross-sectional study was conducted on a newly developed and validated self-administered research tool. Face and content validity of the research tool was done by various healthcare individuals including academics, surgeons, pharmacists and senior nurses. The research tool was also piloted on 15 healthcare providers in a different hospital before start of the study. Only registered healthcare providers of Pakistan were approached to take part in the study. A p-value < 0.05 was considered statistically significant. RESULTS: Total 200 participants out of 350 took part into the study. Among the respondents, doctors (33.7%) expressed greater knowledge than pharmacists (26.7%) and nurses (21.2%). All doctors, pharmacists and nurses showed indecisive attitudes toward nutrition support to the patients. However, in the practice assessment, pharmacists had a slightly higher score. Only 19.4% respondents stated that they perform nutrition screening on admission, and 35% of them prefer to perform nutrition assessment during hospitalization.  CONCLUSIONS: Inappropriate nutrition care from healthcare providers was possibly due to the lack of appropriate guidelines and insufficient knowledge. Special nutrition management trainings and continuing professional development (CPD) courses will be of great help to improve KAP of healthcare providers towards nutrition.