I came across this scripture in Doctrine and Covenants 89:
16. All grain is good for the food of man; as also the fruit of the vine; that which yieldeth fruit, whether in the ground or above the ground—
17. Nevertheless, wheat for man, and corn for the ox, and oats for the horse, and rye for the fowls and for swine, and for all beasts of the field, and barley for all useful animals, and for mild drinks, as also other grain.
Where does the prohibition of drinking beer comes from then when the scripture is clear about mild drinks? I know that it was a
policy/decision by Heber J. Grant around 1920 but why since he never claimed revelation on this issue and I think in order to change/override a canonized scripture, as a Prophet you must claim some sort of revelation?