Paul Saladino· MD
when mammals start to get weaned off of solid food and we now to solid food and off of milk they slow down cease or suppress the produce the expression of a lot of those or production a lot of those enzymes so in in the case of humans in case of mammals in general we stop producing chymosin or chomsen like enzymes um and especially with uh lactase we stop we don't need that enzyme any longer so we don't produce that lactase we can't handle