Abstract
Seven healthy sportswomen were given a thiamine-restricted diet (0.50-0.54mg thiamine/day), containing conventional Japanese foodstuffs for 9 days. During the following 10-day period, polished rice (160g/day) in the experimental diet was replaced by germrice (thiamine-supplemented diet, 0.79- 0.83mg thiamine/day).
Losses of thiamine by cooking the test diets were 37-39% for the diet containing polished rice and 21-24% for the diet containing germrice. Blood thiamine concentration was decreased and TPP effect of erythrocyte transketolase was increased after feeding the thiamine-restricted diet, and returned to the beginning level after 10 days on the diet containing, germrice. The carbohydrate metabolism index and urinary thiamine excretion level did not change by feeding either the thiamine-restricted or the thiamine-supplemented diet.
