There is currently no legal definition for probiotics in the UK. However, probiotics are recognised as live microorganisms (mostly bacteria and a few yeasts) typically found in the gut that, when consumed in adequate amounts, can promote a well-functioning digestive system. Probiotics can be found as food supplements, fermented foods (e.g. yogurt), or beverages (e.g. kombucha).
Probiotics can contribute to various aspects of human health and well-being, making them a valuable addition to a balanced lifestyle. For example, probiotics have a well-established evidence base in the prevention and management of gastrointestinal diseases. They have also been shown to tackle some symptoms of irritable bowel syndrome, lactose intolerance and constipation [1].