There is a belief in some cultures that consuming milk and fish together can be harmful to one’s health.

It’s possible that the belief stems from a religious or traditional practice that prohibits the consumption of certain food combinations, or that certain foods are believed to cause indigestion or other health problems when consumed together.

In some cases, the combination of certain proteins in fish and milk may cause some people to experience digestive issues such as bloating or gas. It is a common belief that the combination of fish and milk can cause the formation of harmful toxins in the gut.

It is important to note that there is no scientific evidence to support this belief and most people are able to consume fish and milk together without any negative effects on their health. However, if you find that you experience any discomfort after consuming this combination of food, it would be better to avoid it.

As always, it is recommended to consult with a healthcare professional if you are experiencing any health concerns or if you are unsure if certain food combinations are safe for you.