The iron content in hair and blood for 37 children athletes who were supplemented with 0

8 and 16 mg Fe/d

respectively

in the form of ferrous gluconate-containing chocolate for 3 months was determined before and after the supplement by INAA

SRXRF and blood analysis. The experimental results indicated that after the supplement of the iron-fortified food

the ferritin level in blood of the male athletes attained to normal and the iron content in hair was increased with the increasing level of supplement

but not in direct proportion. Most of the female athletes had similar results. It is suggested that supplement of 8 mg Fe/d to a child athlete may be adequate.