A dairy-free diet excludes milk solids, which are simply the components of the milk with the moisture removed.

Cow’s milk consists of solids (milk fat, protein, lactose and minerals) in water, which makes up about 87% of the volume.¹ ‘Milk solids’ refers to the dried powder left after all the water is removed from liquid milk, such as milk powder found in supermarkets. If you follow a dairy-free diet, milk solids would need to be excluded.