Chlorine in particular can play a big part in this. Your gut health thrives on good bacteria, and as chlorine is a disinfectant, it may disrupt the system, throwing off the delicate balance of the gut ecosystem. Your gut needs healthy bacteria, but chlorine doesn’t just kill bad bacteria but may affect the good stuff too.
Emerging research is also helping us to understand the correlation between chlorine and gut health. A 2026 randomised controlled trial published in Communications Medicine followed 197 infants for 12 months. 99 were given filtered water, whilst 98 were provided with chlorinated water. The results were fascinating, showing that those who received the chlorinated water had higher levels of microbial pathways associated with antibiotic resistance. This raises an important question around the long-term consumption of chlorinated water, and especially its implications for overall gut health.
As with the recent and ongoing studies around PFAS in water and microplastic exposure, we always recommend erring on the side of caution when it comes to protecting your family's health. This is why Doulton water filter systems work hard to reduce chlorine and other common contaminants, not only providing peace of mind for other concerns but also helping you to maintain a healthy and happy gut. Of course, filtering your water offers other health benefits, including maintaining healthy minerals such as magnesium and calcium.
