While nutrition has long dominated the health space, gut health is a fairly new discovery to the many of us who don’t have a background in science. And yet, it’s quickly become a core focus.

The online grocery store Ocado recently shared that there has been a 247% uptick in searches for ‘gut health’ on its website since 2021. It makes complete sense – gut health has been associated with many of the body’s essential processes, from breaking down food to absorbing nutrients.

“The gut plays a significant role in our overall health; it’s a primary barrier for preventing unwanted viruses, pathogens and bacteria to pass into our bloodstream,” explains nutritionist Jenna Hope. “It’s important for supporting digestion and nutrient absorption, and plays a vital role in supporting immune health, brain health and heart health.” According to Hope, having a healthy gut can contribute to improved sleep health, mental health and cognitive function along with better digestion and energy.

There are still many unknowns about the gut, its many roles within the body and the ways in which it can be nurtured. One popular theory, however, is that gut health can be improved with the help of the ‘five Ks’ – a group of fermented foods said to have a host of nutritional benefits. Is it worth working them into your diet for a healthy gut? We asked Hope for a full debrief.

The ‘5 Ks’ are considered key for optimal gut health – here’s what a nutritionist wants you to know