It’s all very well planning to eat more plants, actively enjoying that daily cup of fibre-rich coffee and giving sauerkraut a go, but if you don’t know how long it’ll take to see any changes, you might quickly lose motivation.

Dr Spector says that his research at Zoe shows it’s possible to see improvements in as little as four months. Zoe’s whole schtick is adding foods rather than taking them away, so that might mean adding chia seeds (rich in protein, fibre and omega-3) to your morning porridge, switching to a more fibrous type of pasta or throwing beans and different kinds of veg into your sauce.

5 signs your gut health is improving according to Dr Tim Spector – and why we should avoid ‘gut healing’ hacks