Casein is also found in human milk in small quantities but its quantity is especially high in cow milk.
For anyone who is lactose intolerant the body only has very minimal amounts of lactase an enzyme that breaks down this form of sugar in milk into simpler sugars that can be digested by the body.
Lactose intolerance is diagnosed through a breathe test and it is the presence of the higher than average amounts of hydrogen and methane gases that point towards lactose intolerance.
Some good news…..
People living with lactose intolerance can have their dairy products and things like yoghurt and cheese are easier to digest.
It is also very uncommon in children younger than 2 years.
Some people are also able to tolerate milk if taken together with other non dairy products.