Change Your Mind, Diet, Goals Why We Should Avoid Cows Milk as Adults. February 1, 2021July 27, 2021by Melissa NesterenkoLeave a Comment on Why We Should Avoid Cows Milk as Adults. Did you know that we humans are the only mammals to consume milk when not weaning? Is it really necessary for us as adults to drink cows milk? The short answer: It's not necessary to drink cows milk as an adult.