Lactose tolerance ( again from Mathieson 2015 ) did not exist among either the Steppe pastoralists or the Neolithic farmers , but developed later amongst mixed groups ( their study found the first evidence for lactose tolerance among the Bell Beaker culture ) .
lactose tolerance again from mathieson 2015 did not exist among either the steppe pastoralists or the neolithic farmers but developed later amongst mixed groups their study found the first evidence for lactose tolerance among the bell beaker culture