Mammalian pH typically stays within a narrow range, generally between the high sixes and high sevens, with 7.4 being optimal.

“physiologically in a mammal um it's it's very hard to get too much below the high sixes and too high above the high sevens and the higher the number the more basic uh and the lower the number the more acidic but would you would you agree with that that physiology tends to exist in the sevens with 7.4 being kind of perfectly neutral yes”