Energy values of lactitol and lactulose as determined with miniature pigs and growing rats

Digestible and metabolisable energy values were determined by the metabolic balance method. The mean (and SEM) metabolisuble energy values for lactitol were 11.8 (0.8) arid 9.8 (1.5) kJ g −1 , respectively, for the laboratory rat arid the miniature pig. For lactulose, metabolisable energy values were 8.4 (1.0) and 9.0 (0.8) kJ g‐ −1 , respectiuely, for the rat and pig. Digestible energy vulues were little different from these metabolisable energy values indicating that the efficiency o f utilisation of the digestion products absorbed may be high.