The forms of vitamin B12 in foods

Br J Nutr. 1976 Jul;36(1):127-36. doi: 10.1079/bjn19760063.

Abstract

1. The forms of vitamin B12 were determined in foods, most of which had been prepared for consumption. 2. Five forms were detected: adenosylcobalamin, hydroxocobalamin, methylcobalamin, cyanocobalamin and sulphitocobalamin. Adenoxylcobalamin and hydroxocobalamin were the predominant forms. 3. The intestinal absorption of [57Co]sulphitocobalamin was estimated and found to be lower than that of [58Co]cyanocobalamin.

MeSH terms

  • Adult
  • Aged
  • Animals
  • Cheese / analysis
  • Chemical Phenomena
  • Chemistry
  • Cobalt Radioisotopes
  • Eggs / analysis
  • Female
  • Fish Products / analysis
  • Food Analysis*
  • Humans
  • Hydroxocobalamin / analysis
  • Intestinal Absorption
  • Male
  • Meat / analysis
  • Middle Aged
  • Milk / analysis
  • Structure-Activity Relationship
  • Vitamin B 12 / analysis*
  • Vitamin B 12 / metabolism
  • Whole-Body Counting

Substances

  • Cobalt Radioisotopes
  • Vitamin B 12
  • Hydroxocobalamin