A milk derivative is an ingredient that is usually extracted from milk and added to a product for a specific purpose. It refers to any ingredient that stems from milk, but it is not milk per se. Milk derivatives can be found in a variety of products, including non-dairy protein shakes, non-dairy creamer, and non-dairy cheeses. They can give bread more flavor, color, and a smoother dough. Some examples of milk derivatives include skimmed milk solids, dry milk solids, curds, whey, whey powder, milk powder, and casein.

It is important to note that the distinction between non-dairy and dairy-free is significant when you have a milk allergy or intolerance, or are following a vegan diet. Dairy-free means the complete absence of all dairy ingredients, including lactose, while non-dairy refers to products that can contain a milk derivative.

If you are lactose intolerant, it is not recommended to consume milk derivatives, even if the product is labeled non-dairy. Milk derivatives can contain low levels of lactose, which can cause allergic reactions in individuals who are highly sensitive to lactose.