COVID-19 has been known as a respiratory illness caused by severe acute respiratory syndrome, which has been threatening the health of the public around the world (Legido-Quigley et al. 2020;Li et al., 2020). Increasing evidence has proved it raises some digestive symptoms, such as anorexia, diarrhoea, nausea and vomiting, were found in patients diagnosed with COVID-19 (Richards & Andrews, 2004;Aguila et al., 2020;Ungaro et al., 2020). This was consistent with what we were aware of when providing nursing care for patients with COVID-19. Some patients denied eating or had a lower level of appetite during their treatment. Because of this, there is a recognized need for managing their malnutrition that attributed to the alterations of smell and taste and lack of appetite (Lechien et al., 2020). Besides, this negative impact on food intake might also result in malnutrition and weight loss (Harris et al., 2017