When a baby is reacting to bovine milk protein, they will become
SECONDARILY lactose intolerant -- the inflamed/damaged intestines lose
ability to make a few enzymes, including lactase. The lactose intolerance
tests can be positive but the lactose intolerance can disappear very
quickly after removal of bovine fortifiers and/or mother's dairy diet. The
true incidence of lactose intolerance in an infant is extremely incredibly
rare -- there's no way for such a gene to be passed on (except for a funny
small pocket in Greenland), until of the last 50 years (lactose-free
formulas). Mother having lactose intolerance has no bearing. That's a
natural adult state. Lactose is a baby sugar -- not occuring in a natural
adult diet and thus our bodies are not designed to digest it into
adulthood. Those of Northern European descent developed lactase enzyme
persistence over time as they learned to depend on cows to turn little bits
of weeds into food for them (milk) in the Northern Tundras. Those who
couldn't tolerate it died.

As for lactase enzyme in mother's milk -- I surely don't think so (but
wouldn't mind being proven wrong). I looked this up very pointedly when I
disbelieved (and still disbelieve) the raw-cow's-milk "research" sites that
say raw milk has lactase enzyme. Not much of their other information was
confirmable either, so...

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