What are the effects of undigested protein in the blood and body?

Probably nothing: In 1930 hh donally reported an eloquent experiment in lactating women demonstrating that in virtually all normal persons undigested protein enters the bloodstream and can be detected in the skin. Foreign food proteins are commonly found in breast milk. Just because digestion is not completed in the gut does not mean that the gut is leaky or that these foreign proteins invariably cause disease.

Macromolecules: Undigested proteins are termed macromolecules and normally are "cleaned" by the reticuloendothelial system (res) of your body. One theory of food allergy is is related to improper feeding habits in babies since the GI tract remains immature for a number of months after birth. Nsaids also increase macromolecular absorption. Certain disorders such as RA have defective res.