Air pollution levels across major Indian cities have made digestive health a growing concern, pushing many people to rethink their daily diet—starting with something as basic as milk. Dairy remains an important source of calcium and essential nutrients for those who are not lactose intolerant, but the two primary types of cow’s milk, A1 and A2, can affect the gut very differently. With environmental stress already straining the body, choosing the right variety of milk has become more important this pollution season.
Dr Sukrit Singh Sethi, director and senior consultant for gastroenterology, hepatology, and liver transplantation at Narayana Hospital Gurugram, shared insights into how A1 and A2 milk impact digestion during poor air quality and which option may be safer for sensitive stomachs.
According to Dr Sethi, A1 milk contains a protein known as beta-casein A1, which can release a peptide called BCM7 during digestion. This peptide has been associated with digestive issues, bloating, inflammation, and general stomach discomfort in some individuals. With urban environments facing high levels of pollution and stress, consuming A1 milk may contribute additional strain on the digestive system.
A2 milk, by contrast, does not release the problematic peptide and is considered gentler on the stomach. Dr Sethi explained that many people who struggle with digestive symptoms from conventional milk often find A2 milk easier to tolerate. He added that A2 milk may help support overall gut comfort, especially for individuals dealing with mild sensitivities to milk proteins or lactose.
When choosing between the two, the gastroenterologist noted that people with strong digestion can generally consume either type safely. However, during times of elevated pollution, when the body is already coping with environmental stress, opting for the easier-to-digest A2 variety may provide better support for digestive health. Children and other vulnerable groups may particularly benefit from selecting the gentler option.
This information aims to guide consumers in making more informed dietary decisions during pollution-heavy months, especially when prioritizing gut-friendly choices can help the body manage external stress.
