Karleen,
 
I'm always talking about protein sensitivities occurring in infants due to  
mothers' leaky gut syndrome which involves poorly digested proteins and 
other  substances being able to pass through the inflamed intestinal wall that 
has  larger openings than it is supposed to have.  The unbroken down 
proteins  pass into the bloodstream which of course then courses through the breast 
where  milk producing cells receive their nutrients.  I'm no expert but see 
so  many babies with gassiness, frequent regurgitation, reflux, eczema who 
vastly  improve when mom removes offending proteins from her diet and treats 
her damaged  gut.  I'm also fortunate enough to know a nutritionist to whom 
I refer  moms/babies who takes over with guidance and treatment.
 
All this being said, just doing a search on leaky gut led me to the  
following site with a good explanation of how proteins enter the bloodstream, 
http://scdlifestyle.com/2010/03/the-scd-diet-and-leaky-gut-syndrome/   I have no 
investment nor specific experience with the site nor diet  recommended.  
Hope this helps your understanding and is related to your  question.
 
Barbara Latterner, BSN, RN, IBCLC

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