Abstract: Compositions comprising methionine, threonine, and a pharmacologically acceptable iron compound as active ingredients are effective for improving or preventing iron deficiency anemia and can be ingested easily and exhibit effects from an early stage.

Abstract: An aspect is to provide a composition effective for preventing or improving bone strength decrease. A composition for preventing or improving bone strength decrease, that is, bone strength decreases due to bone density decrease, bone quality decrease, bone metabolism decrease, and the like, containing ornithine as an active ingredient.

Abstract: An information processing method, which includes an evaluating step of evaluating at least one item of growth potential, nutrition state of a protein, utilization efficiency of an amino acid, glucose metabolism, stress, appetite, feed efficiency, growth speed, and growth prediction, by using a blood concentration value of at least one amino acid of Asn, Ser, Gly, His, Thr, Arg, Pro, Tyr, Val, Met, Orn, Lys, Ile, Leu, Phe, Trp, and 3Met-His, obtained from an animal, or a value of one or a plurality of formulae that include an explanatory variable to be substituted with the blood concentration value, calculated using the formula and the blood concentration value, wherein at the evaluating step, each evaluation is carried out using the blood concentration value or the value of one formula, is useful for evaluating the health and/or growth state of livestock.