In the course I took on maternal-child nutrition in 1979 at University of
Washington, our teacher, Bonnie Worthington, said that only 20% of the milk
drunk at a meal was actually in the breast already and the rest was
synthesized during suckling and drunk as it was produced.

I can't find this statement in the textbook for the course, though it may be
there.  Anyone else heard this and if so can you tell me where I can find
it?

Almost nothing I learned in that course has been changed, though much has
been added.  So I think the statement is likely to be true, but I would like
to find the source.

Rachel Myr
Sleepless in Kristiansand, Norway

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