Australian diets are way worse than imagined, with 99 percent of Aussies eating too much junk food and not enough vegetables.  This is according to a new, exhaustive study by CSIRO.

CSIRO released its Healthy Diet Score report on Monday.  It's the result of canvassing the dietary habits of more than 86,500 Australian adults across the country over a 12 month period.  The nation's diet score went from a 61 in August 2015 to 59.  That's like going from an F to an F Minus.  The minimum benchmark is 70, and 80 percent of those surveyed fell below that.

"We have an image of being fit and healthy, but with a collective diet score of 59/100 that image could be very different unless we act now," said CSIRO Research Director Professor Manny Noakes. 

"If we can raise our collective score by just over 10 points, we help Australia mitigate against the growing rates of obesity and lifestyle diseases such as heart disease, Type 2 diabetes and a third of all cancers," he continued.  "All people need to do is halve the bad and double the good. In other words, halve the amount of discretionary food you eat and double your vegetable intake."

Women had better nutritional levels than men, and some office workers tend to have better diets than construction workers, who were among those with the poorest diets.

"This reflects (construction workers') environment," said CSIRO Research Dietician Dr Jane Bowen, as quoted by Fairfax Media.  "They physically work very hard so are very hungry, but there is not always easy access to healthy food and problems with storage."

You can gauge your own diet, and get tips for improvement on CSIRO's free website.  

"It is never too late to eat better and increase your score, and the nation's," Professor Noakes said.  "We encourage people to also take the test regularly to ensure they are improving their eating behaviour and overall health and wellbeing."