It appears what's happening is a bit of truthiness and a bit of confusion.
The idea that grains cause gut symptoms is not unfounded. For some people, the gluten in some grains will damage the gut. These people suffer from coeliac disease, which is a permanent intolerance to gluten. They need to avoid all traces of wheat, barley, rye and oats. It's thought about one in 70 New Zealanders has coeliac disease.
For some others , the issue is not gluten but types of carbohydrates in some grains (and other foods) known as Fodmaps. Fodmaps are poorly digested by some people, producing symptoms of Irritable Bowel Syndrome, including bloating. It's tricky to know how many people this applies to, but in the US it has been estimated IBS affects 15-20 per cent of people, many of whom will be affected by Fodmaps.
That leaves at least three-quarters of us who don't have an issue with grain foods, who are free to enjoy their versatility, flavour and health benefits.
Not all grains are high GI. White bread, white rice, rice cakes, puffed rice certainly are, but there's a big difference between a doughnut and a bowl of wholegrain oats.
Most wholegrains are low GI, which means they help us feel fuller for longer. And they contain useful types of fibre, which are good for our gut health.
Studies have shown people who regularly eat wholegrain and high fibre foods are less likely to gain excess weight over time and are more likely to have smaller waists. What's more, grains taste great.
For most of us, an occasional meal of proper, beautiful pasta prepared with lots of veges and a delicious sauce is a pleasure to be savoured.
• Niki Bezzant is editor in chief of Healthy Food Guide magazine.