Scientist Jordan Haworth has built a following calling time on gut-health nonsense after he fell victim to it himself. Hannah Twiggs talks to him about the myths he wants to bust and the health hacks he still swears by T here is a tub at the back of my cupboard that I no longer make eye contact with. Greens, it says, in the optimistic lettering these things favour, and it cost the better part of £40. I bought the emerald powder one January in the annual fit of self-improvement that grips us all