Some adults or children may feel uncomfortable with digestion after consuming milk. The reason could be due to two things, lactose intolerance or sensitive to cow's milk. Lactose intolerance and sensitivity to cow's milk are two different things, but have symptoms that are similar to each other. Consider the difference between lactose intolerance and sensitivity to cow's milk below. Cow's milk is known as a source of protein, fat, calcium, and vitamin D. However, not everyone is suitable to drink milk. There are those who feel heartburn and some who show allergic symptoms, such as itching and swelling, after drinking milk. There are two common types of medical conditions that underlie this complaint, namely lactose intolerance and sensitivity to cow's milk. Maybe not many people know that there are two genetically different types of milk-producing cows, namely A1 and A2 cows. The main proteins in cow's milk are casein and whey. The genetic variation of A1 an