Why Current Carbohydrate Quality Measures Fall Short—and How to Fix Them

A new perspective piece in Advances in Nutrition critiques current methods for assessing carbohydrate quality. The authors argue these approaches are inconsistent and fail to capture the full nutritional and environmental picture. They propose a more comprehensive system for evaluating carbohydrate-containing foods. Rebekah Schulz and Joanne Slavin, both from the University of Minnesota, authored the paper. They highlight that existing measures like glycemic index (GI) and fibre content do not reflect real-world eating habits. When carbohydrates are eaten with other foods, these metrics become less reliable.

The researchers call for a standardised carbohydrate quality metric. This would include factors such as whole-grain content, fibre, added sugars, and protein quality. It would also consider the ratio of total carbohydrates to fibre, the degree of food processing, and environmental impact.

The paper suggests using an algorithm to guide quick decisions about carbohydrate-rich foods. The authors state they received no funding for this specific work, though Joanne Slavin has previously been supported by Potatoes USA. The proposed metric aims to provide a clearer, more holistic assessment of carbohydrate quality. It would address gaps in current methods by incorporating nutritional, processing, and environmental factors. The article is available in Advances in Nutrition under the DOI 10.1093/advances/nmab050.