I was at the LLL conf in Boston and one of the speakers, Dianna Chisholm Estep, RNC,BSN,IBCLC, covered this topic.
She was covering "Excessive Fussing, Crying & Colic: Etiologic Considerations and Concerns" and nutritional aspects were discussed.  Cruciferous vegetables and fruits make a by product of s-methyl - L cystine sulfoxide.  This by product can enter mom's plasma and therefore into her breastmilk.  This will happen within 20 minutes of ingesting these foods.
If there is anyone on our list who specializes in gastroenterology maybe they can shed more light on this.

What I surmised from her presentation was if the suspicision of what the mom ate causes the baby's distress, that this would show up with in 20 minutes of eating the suspect food.  These are gas by products in the plasma and would not act the same as protiens.

I hope this makes sense.
Ann Perry RN,IBCLC
Boston, MA

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