Abstract: An object of the disclosure is to provide a composition for evaluating the hepatic glucose uptake capacity of a subject and a method for evaluating the hepatic glucose uptake capacity of a subject with the composition. An object of the disclosure is to provide a method for determining the stage of pre-onset diabetes in a subject with pre-onset diabetes using the method for evaluating the hepatic glucose uptake capacity. An aspect of the disclosure accordingly provides a composition comprising 13C-labeled glucose for evaluating the hepatic glucose uptake capacity of a subject. Another aspect of the disclosure provides a method comprising measuring 13C-labeled glucose in a blood sample or an expired air sample obtained from the subject to which the composition was administered. The desired evaluation or determination can be achieved by comparing the measured value with a reference value.

Abstract: An aspect of the disclosure provides a method of evaluating the nutriture of a subject, comprising (1) calculating the ratio of the 13CO2 amount to the unlabeled CO2 amount or total CO2 amount in an expired air sample obtained from the subject to which a 13C-labeled amino acid was administered; and (2) comparing the ratio with a reference value to evaluate the nutriture. Another aspect of the disclosure provides a composition comprising a 13C-labeled amino acid for evaluating the nutriture of a subject.

Abstract: An object of the disclosure is to provide a composition for evaluating the hepatic glucose uptake capacity of a subject and a method for evaluating the hepatic glucose uptake capacity of a subject with the composition. An object of the disclosure is to provide a method for determining the stage of pre-onset diabetes in a subject with pre-onset diabetes using the method for evaluating the hepatic glucose uptake capacity. An aspect of the disclosure accordingly provides a composition comprising 13C-labeled glucose for evaluating the hepatic glucose uptake capacity of a subject. Another aspect of the disclosure provides a method comprising measuring 13C-labeled glucose in a blood sample or an expired air sample obtained from the subject to which the composition was administered. The desired evaluation or determination can be achieved by comparing the measured value with a reference value.