Lobbyists for 'big food' are potentially swaying health policies in favour of their corporate bottom line in Australia, new research has claimed.

A Deakin University study published Monday has reported finding "direct evidence" of food industry political tactics that had the potential to shape public health-related policies, at the expense of public health.

The food industry's lobbying may be swaying policies in favour of shareholder profits against public health outcomes, new research claims. Credit:Cathryn Temain

The research, led by Melissa Mialon, conducted interviews with 15 former politicians, current and former public servants and senior executive officers with non-government organisations over a four month period who had exposure to the industry's "corporate political activity".

Researcher Dr Gary Sacks said unhealthy diet was the biggest contributor to the burden of disease and the food industry had a major influence on the products people choose to eat and drink.