Alan wrote:

> Yes goat's milk contain lactose but I have yet to find if the sugar
> structure in goats milk ( and sheeps milk) are the same as for cow's milk


All naturally occurring lactose is the same.  The source of the lactose is
not relevant.  It does not matter if the lactose originated in milk of a
cow, sheep, goat, yak, dog, human, etc.  People who are lactose intolerant
will have a reaction to milk from any source unless it has been treated to
hydrolyze the lactose.

Because the milk of different animals contains different amounts of
lactose, it _may_ be possible to find a type of milk that contains an
amount of lactose that is small enough not to cause a reaction in a
particular individual.  However, I wouldn't bother trying goat's milk.  As
far as I know, goat's milk contains a higher concentration of lactose than
does cow's milk.

Amanda H. Ackerman
PhD candidate, Chemistry
University of Wyoming