Tim Spector is not only the founder of nutrition app Zoe and a professor of genetic epidemiology, he's also a household name for all things gut health. So, when Tim revealed the key foods and ingredients he keeps in his fridge, Instagram sat up, listened, and took some notes. "It's a bit experimental, it's not very tidy," Tim said, describing his fridge and its contents of fermentation experiments including kefir, fermented mushroom paté, red cabbage sauerkraut and more.