From Christine Dann, Diamond Harbour, New Zealand
Why is it so hard to define what is meant by ultra-processed foods (UPFs)? These comprise any edible substance made using ingredients not used by (or available to) home cooks, processed by methods not possible in home kitchens, or both of these (19 August, p 16).
Incidentally, yogurt that is made in the traditional way is most definitely not a UPF, and I don’t think it should have been used to illustrate the story.
