"I don't see food chemistry per se as a bad thing. But I do try to minimise the amount of food I eat with preservatives and food colouring in it. I prefer to get nutrition from raw, unmodified food.
"Greer is still too young for solids, but I am starting to think about what I should feed her and whether to shell out extra money for organics. I think I will become even more attuned to what we eat, and I definitely support full labelling of ingredients."
Shepheard accepts there is a role for preservatives in food, part of which could be to cut down on spoilage and wastage and help to feed more of the world's population.
"But there are larger reasons for why we have hunger and famine. It's more to do with geopolitics rather than food shortages - the realpolitik of the world. I think in the West, in New Zealand, if you can afford it, it's good to steer clear of preservatives, and to eat more food which is less modified."