Lactose intolerance is the inability to for a human body to digest lactose. It's very common as around 70% of the people worldwide are affected.

A person who is lactose intolerant produces less lactase than someone who can eat dairy. Lactase is the enzyme that breaks down lactose in the digestive track. If you don't have enough of it, the lactase is simply not broken down and causes some discomfort in your gut - also known as lactose intolerance symptoms.

The symptoms can be different for everyone, but they usually include difficulties digesting, feeling bloated, diarrhea, cramps, pain in your abdomen, flatulence or gas, nausea and vomiting. In rare cases you can even experience skin rashes and mood swings.

However the severity of the symptoms varies from person to person, so it's important to test how much dairy you can tolerate.

Worldwide around 75% of adults are affected by LI. This number is higher in Native Americans and Asians and lower in Europeans where about 25% are concerned.

Lactose intolerance usually appears between age 20-40 and increases as you get older.

As you know, lactose intolerance is the inability of a person to digest lactose without symptoms, due to a lack of the enzyme lactase in their body.

By taking lactase as a pill before eating dairy, you can provide your body with the necessary amount of lactase to digest the lactose you're about to eat.Manufacturers who want to make their regular dairy product lactose free add lactase during the manufacturing process. The lactase will break down the lactose making it lactose free.Lactase is harmless as it is a substance produced by our own bodies.