Food is made up of Protein, Fats and Carbohydrates. ​
They are called macronutrients.​​
Proteins are the part that people can be allergic to (e.g. famous nasty proteins: Peanuts, Shellfish, Eggs)). There are two types of protein in milk: WHEY and CASEIN.
CASEIN is made up of 3 different fractions: Alpha, Beta and Kappa​.

Beta-casein has 2 sub-fractions-called A1 and A2. A1 beta-casein is a nasty one that causes digestive issues (bloating, cramps, gassiness). Sheep milk doesn’t have this as it is naturally an A2-type milk.​
Always consult a doctor to determine if you have cow milk intolerances or cow milk allergies.
By Susan