血清カロチンおよびビタミンA値の増加からみたカロチンの人体における吸収

概要

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After orally administering varying amounts of β-carotene dissolved in oil or of vitamin A palmitate in oil to a healthy male adult, the changes in serum vitamin A and carotene levels were traced. Comparing the maximum values for serum vitamin A increase after administering the same I.U. of vitamin A palmitate or β-carotene, the value following β-carotene administration was about 25% of that for vitamin A palmitate. After ingesting varying amounts of cooked squash, carrot and spinach, respectively, the increase in serum vitamin A and carotene levels was compared with that after ingesting pure β-carotene solution. The maximum values for increase in serum vitamin A levels after ingesting vegetables were about 31-55% of those after ingesting the same I.U. of β-carotene solution and those for increase in serum carotene levels were about 50% of those after ingesting β-carotene. The absorbability of carotenes in vegetables, therefore, is considered to be about 30-50% of that of pure β-carotene solution.
日本ビタミン学会の論文