Experts have issued a warning over a trendy food which has seen an almost 50% surge in sales thanks to promoted health benefits.
Fermented foods such as kimchi, artisan cheese and keffir have seen a surge in popularity amid claimed benefits for gut health - leading to things such as better weight management and better heart health.
But some experts have warned the food, packed with good bacteria, is not for everyone. A recent study by Ohio State University found some fermented foods contain antibiotic-resistant bacteria, which can cause vomiting and diarrhoea, or even sepsis.
One they examined contained a strain of Weissella - linked to infection of the lining of the heart and bones - and even death.