25/02/2026
Modelling studies suggest that widespread dietary shifts could save billions in healthcare costs and add over a million quality adjusted life years worldwide.
“Covid made clear that trying to manage the fallout of diseases after they occur is enormously costly,” says lead author Dr Komathi Kolandai. “We need to look seriously at modifiable lifestyle factors that can prevent or reduce disease risk.”
An honorary academic at COMPASS Research Centre at the University, Kolandai says Covid-19 exposed the limits of a reactive health system and showed the need for stronger prevention.
According to an international, transdisciplinary review, a diet rich in fruit, vegetables, legumes and grains could help address looming issues like pandemics and health threats from a changing climate.
“Several earlier reviews found that people who adhered to healthy plant-based diets had lower rates of infection, hospitalisation, and severe outcomes. Some studies also suggested a reduced risk of long Covid,” says Kolandai.
Beyond Covid, the review highlights well-established evidence showing that plant-based diets reduce the risk of major chronic diseases, including heart disease, type 2 diabetes, obesity, chronic kidney disease, and some cancers.
The article notes that some hospitals in the US, the UK and Germany have already introduced plant-based meal programmes to promote health and reduce environmental impact.
However, they admit major barriers remain, including limited nutrition training for physicians, inconsistent definitions of ‘plant-based diets’ in research, and unequal access to affordable, culturally appropriate plant-based foods.
Read more about the study here: https://www.auckland.ac.nz/en/news/2026/02/03/plant-based-diets-should-doctors-be-prescribing-them-.html