‘I was overeating’: the Zoe nutrition app founders on diet, raising millions and the perfect microbiome

From left, Zoe founders George Hadjigeorgiou, Tim Spector, and Jonathan Wolf. Photograph: Sophia Evans/The Observer

Tim Spector, professor of genetics and co-founder of the Zoe personal nutrition company, is recovering from a mild illness when the Observer meets him and the firm’s other founders.

“People expect Tim to have the immune system of perfection,” jokes co-founder and chief executive Jonathan Wolf, “but even he, with his almost perfect microbiome, occasionally gets sick.”