People follow a dairy-free diet for different reasons. Some are allergic to the dairy proteins themselves, while others lack the enzyme lactase, which digests milk sugar, called lactose. People who are lactose-intolerant may choose to eliminate or reduce products containing lactose, while those with allergies must eliminate dairy proteins altogether. There are many available products for those on a dairy-free diet. Whether you’re lactose intolerant, have a dairy allergy, or simply prefer to follow a plant-based diet.