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Foods naturally rich in glutathione Some foods contain high levels of glutathione and can provide it directly, but the compound is not absorbed well through the gastrointestinal tract, because digestive enzymes break it down into amino acids

Anti-parietal cell antibody is more sensitive (90%) but less specific (50%) for diagnosis of PA as it can also be found in other autoimmune diseases.29 39 On the other hand, anti-intrinsic factor antibody is less sensitive (50%) but more specific (98%), and its presence is almost diagnostic of PA.29 39 Schilling test, traditionally used to diagnose intrinsic factorrelated malabsorption, is now rarely performed

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The 'H-NMR proves that there is no signal corresponding to the carboxylic acid (COOH) around 12-13 ppm (Fig

The Vegan Society and NHS recommend that vegans take B12 supplements or consume fortified foods regularly