Is it "normal" to consume milk as an adult?
Humans are said to be the only species to drink milk in adulthood... True, but we are also the only species that cooks its food and have domesticated numerous animal and plant species. Mankind is the only species to have taken such advantage of its food environment (selection, production, preservation, preparation). And this is true of dairy products, which he has consumed in varied forms for over 8 000 years.
In addition, biologically, man is an omnivore and has to find the nutrients that are necessary to him in all the different groups of food. In all this variety, obviously, the choices of food must be made according to the principles of a balanced diet, but it also has to cater for socio-cultural needs, in which enjoyment, taste and identity are also important. His omnivorousness (combined with the ability to choose) has enabled man to live in all regions and under every climate of the earth, and meet his needs from local food resources. Those local resources set the pattern for specific feeding models. There is not just one feeding model, but several of them, and this accounts for the variety and richness of the different cooking traditions of the world in which milk has found its place alongside other foods.