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In twenty-four of the subjects, absorption of orally administered cyanocobalamin was normal, and there was a haematological response to small doses of orally administered cyanocobalamin, indicating adequate absorption. In one subject there was impaired cyanocobalamin absorption although free gastric hydrochloric acid was present.<\/jats:p><jats:p>3. The findings indicate that the absorptive function of the small intestine was unimpaired, with one exception, although there was a possible defect in nucleoprotein synthesis associated with a lack of vitamin B<jats:sub>12<\/jats:sub>and folic acid. Addisonian pernicious anaemia was not found in any of the subjects.<\/jats:p>","DOI":"10.1079\/bjn19740103","type":"journal-article","created":{"date-parts":[[2005,5,18]],"date-time":"2005-05-18T23:51:57Z","timestamp":1116460317000},"page":"491-501","source":"Crossref","is-referenced-by-count":4,"title":["Vitamin B<sub>12<\/sub>absorption in megaloblastic anaemia"],"prefix":"10.1017","volume":"32","author":[{"given":"B.","family":"Senewiratne","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Hettiarachchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kamalini","family":"Senewiratne","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2007,7,24]]},"reference":[{"key":"S0007114574001048_ref003","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-67-6-1201"},{"key":"S0007114574001048_ref020","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1016\/S0021-9258(18)57092-7","volume":"177","author":"van de Kamer","year":"1949","journal-title":"J. biol. 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