Lactose was first discovered in the year 1619 and was confirmed as a form of sugar in the year 1780. It is a carbohydrate-sugar and is made up of glucose and galactose.
Lactose is a common sugar which we consume on a daily basis and is used as an energy source in the body. It can be found in almost all of the dairy products that we consume, such as cheese, milk, butter and ice cream.
The sugar also forms 2% to 8% of the milk we drink. It is extremely essential for growing babies.
Lactase is an enzyme which comes under the category of proteins. This enzyme is basically responsible for the hydrolysis of lactose in the human body. It is present in the small intestine and its main purpose is to break the lactose present into two main sugars. The lactase enzyme adds a water molecule to the lactose and breaks it into two components - glucose and galactose.
Breaking the lactose into its two components is extremely important and failure to do so would result in stomach cramps and pain.