Expert comment provided by Dr Hariom Yadav , an associate professor of neurosurgery and brain repair, who looks at how gut health affects ageing. He is also a scientific advisory board member at  WonderBiotics . You probably already know that good gut health can make everything from your mood to your immune system better.  Some studies have suggested that changes to your gut could reveal dementia risk years before diagnosis, too.  And microbiome researcher Dr Hariom Yadav recently published some research which looked at how microbiome imbalances might affect brain ageing (neurodegeneration).  Here, we asked Dr Yadav to share why our diet might affect how our minds age,  some gut health mistakes he’d never make if he wanted to keep his brain younger for longer, and what we can do to make our odds better.  Why might our gut health affect our brain ageing?…