Compositions, comprising one or more amino acids selected from the group consisting of tryptophan, methionine, phenylalanine, valine, leucine, histidine, lysine and threonine, and isoleucine at a content of not more than 1.5 wt % relative to the total amount of the nutrition composition, provide a more economical and effective nutrition composition for suppressing the growth of hemocytozoon such as malaria parasite and the like.
