A method for improving adsorption of amino acids in a vertebrate,
including mammal and bird, is included. The method comprises
administering to a vertebrate, including mammal and bird, in a sufficient
amount and/or at a sufficient rate to enable a desired effect, AKG, AKG
derivates or metabolites, AKG analogues or mixtures thereof. Also
contemplated is a method for decreasing adsorption of glucose in a
vertebrate, including mammal and bird, comprising administering to the
vertebrate, including mammal and bird, in the need thereof, AKG, AKG
derivates or metabolites, AKG analogues or mixtures thereof, for
decreasing glucose adsorption as well as compositions for use in
treatment.