Our final question on the hunt for our deficiency – what was taken out of the food we consumed as a result of these changes? Did the dramatic rise in vegetable oil consumption, combined with food-processing techniques, somehow cause a micro-deficiency of a food essential for our health? Recent research into lipids (fats) suggests that this may indeed be the case, and that these changes may not only be contributing to obesity but also to other common Western diseases such as heart disease, autoimmune conditions and cancer.

