Proceedings of the National Academy of Sciences of the United States of America · 4 authors, 1 centre
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This letter critiques a study that combined nutritional and environmental scores for packaged foods, arguing that its method of using a 100-g reference scale may obscure the clear relationship between healthy diets and low environmental impact.
This is a commentary letter responding to a study by Clark et al. that combined a Nutriscore-based nutritional score with a calculated environmental impact score for packaged foods. The authors note that while the expected relationship between healthy diets and low environmental impact is well-established for patterns like the Mediterranean diet, the original study's figure did not show a clear pattern. They argue this is because the dietary score was computed on a 100-g scale reference, which does not reflect actual consumption patterns based on portion size and frequency.
