Abstract
The biological availability of biotin occurring in cereals, compared to added biotin, was determined by a chick growth assay. The microbiologically determined biotin content of corn was low, however, this biotin was completely available to the chicks. In milo and oats, the biotin availability is reduced to 20 and 30%, respectively. The results derived from five samples of barley were variable, the highest value for the biotin availability was 22%, the others were considerably lower. Biotin contained in wheat gave no significant growth response, its bio-availability being low, in a range without practical value. The feed conversion values also closely reflected the intakes of available biotin with the investigated cereals.
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