Given that dairying in the Middle East started thousands of years before the LP allele emerged in Europe, ancient herders must have found ways to reduce lactose concentrations in milk. It seems likely that they did so by making cheese or yogurt. (Fermented cheeses such as feta and cheddar have a small fraction of the lactose found in fresh milk; aged hard cheeses similar to Parmesan have hardly any.)
http://www.nature.com/news/archaeology-the-milk-revolution-1.13471
#milk #food #evolution #genetics #chees #yogurt #matsun (: