抄録
The accelerating effect of food colors of phthalein series on urinary thiamine excretion in rats was studied. The administration of eosin, erythrosin, and uranin for 2 weeks in a concentration of 1.44×10^<-2> moles resulted in increase of urinary thiamine as it was the case with phloxine reported in the previous paper, especially uranin showed a marked increase compared with the other two in the excretion percentage. The cause of this finding seems to be the effect of phthalein itself rather than halogen contained in phthalein compounds.
