Gluten-free, sugar-free, oil-free, grain-free, legume-free, raw hummus wheat-free bread… the supermarket shelves have become shrines to ‘clean eating’ – a faith that promises happiness, healthiness and an abundance of energy at a go. The craze triggered by vegan food photos and social media hashtags like cleaneating, eatclean has millions of followers worldwide. In fact, cleaneating …