7. Natto
A traditional Japanese dish of fermented soybeans, natto is a rich source of beneficial bacteria. It’s traditionally consumed at breakfast and has a beneficial effect on the gut. Containing as much as 100 times more vitamin K2 than some cheeses, it’s particularly useful for those at risk of poor bone health.
However, if you’re on blood thinning medication, such as warfarin, you should refer to your GP or registered dietician before introducing vitamin K-rich foods into your diet.
8. Olives
Olives are one of the most popular fermented foods. Their natural saltwater fermentation makes them rich in lactobacillus, one of the most influential species of gut-friendly bacteria.