Kefir Craze: Gut Health Boon or Brewing Danger?

Kefir, a fermented milk drink, has experienced a significant surge in popularity, with sales at Tesco reportedly increasing by 400% in just 18 months. This ancient beverage, originating from Russia and Mongolia, is consumed for its potential to boost gut health. It is packed with billions of beneficial microbes, offering more than yogurt.

However, experts warn that the sudden introduction of these microbes can cause short-term digestive discomforts such as gas, bloating, cramps, and diarrhea. To mitigate these effects, it is recommended to start with small portions and gradually increase intake. Certain conditions, like Irritable Bowel Syndrome (IBS) and Small Intestine Bacterial Overgrowth (SIBO), might be aggravated by kefir.

In rare and extreme cases, particularly for individuals with severely compromised immune systems, kefir can lead to dangerous infections. A case highlighted involved a 70-year-old man who developed sepsis after consuming a probiotic similar to kefir, leading to a fatal outcome. Those with significant underlying health issues, including HIV, organ transplant recipients, or those undergoing cancer treatment, should consult a doctor before consuming kefir.