As far as could be determined he had never received medication containing intrinsic factor. In the fall of 1965 ... A xylose tolerance test showed 4.6 gm. excreted in 5 hours after a 25-gm.

My B12 and folate levels were low. My antiparietal antibodies were abnormal, but the intrinsic factor antibodies were negative. I received daily B12 injections for six days, and now I’m on them ...

If so, it is of interest to determine whether the effect of steroids can be obtained only in patients in whom there was a demonstrable serum intrinsic-factor antibody. It is further of interest to ...