Abstract
The final body weights of the newly weaned DDN- and DD-strain mice fed with ordinary mixed diet for 40 days were 29 and 26.5g respectively. No difference was found between the occidental and Oriental Co. types of diet. After feeding young mice for 18 days with synthetic diet without thiamine. The vitamin was added to the diet. Adding of 1μg resulted in no increase and 3-5μg a light increase in the body weight. Adding of 20-50μg of the vitamin showed a remarkable recovery of the body weight at the 40th day, catching up to the level of the mice fed with synthetic diet with 30μg of thiamine from the beginning. The mice grown up to about 20g showed remarkable decrease in body weight by giving the thiamine deficient diet for 18 days and could not recover or almost died even when they were given 100 μg per day of thiamine there-after.
