Age, chronic illness, medication, stress, alcohol consumption and poor eating habits can impact the state of your gut health. To restore balance in your digestive system, incorporate fermented foods such as sauerkraut, kimchi and kefir into your diet, along with yoghurt, kombucha and miso - these are all rich sources of probiotics. Studies suggest diet may have a direct impact on gut health and can contribute to inflammation, autoimmunity and neurological states.