THE PRESENT INVENTION IS DIRECTED TO A COMPOSITION FOR AMELIORATING HYPOALBUMINEMIA CONTAINING A BRANCHED-CHAIN AMINO ACID(S) AS AN ACTIVE INGREDIENT(S), WHEREIN THE COMPOSITION CONTAINS LEUCINE AND/OR ISOLEUCINE AS THE ACTIVE INGREDIENT(S) AND DOES NOT CONTAIN VALINE. AS THE ABOVE BRANCHED-CHAIN AMINO ACID(S), LEUCINE AND ISOLEUCINE ARE PREFERABLY CONTAINED. THE MASS RATIO OF LEUCINE TO ISOLEUCINE DESCRIBED ABOVE IS PREFERABLY FROM 0.1 TO 10. AS THE ABOVE BRANCHED-CHAIN AMINO ACID(S), EITHER LEUCINE OR ISOLEUCINE ALONE MAY BE CONTAINED. THE PRESENT INVENTION IS SUITABLY USED AS AN INFUSION FORMULATION, AN ORAL FORMULATION OR A FOOD OR DRINK. (FIG. 1)