Permeability tests

One can measure permeability of the gastrointestinal tract to probes of various sizes or to ratios of sugars. There seems to be a wide spread of permeability in those with food sensitivities such that it virtually completely overlaps with that of healthy patients. Changes in permeability have consistently been shown to occur following positive challenges and it is suggested that they may prove useful in the evaluation of drugs suitable for the treatment of food hypersensitivities.30

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