Selection of dietary protein and carbohydrate by rats: changes with maturation.


Weaning (21-day-old; 40-50 g) male rats given simultaneous access to two foods, containing 18% casein and 15 or 70% carbohydrate (dextrin), tended to consume only 29-35% as much protein as carbohydrate (i.e., protein/carbohydrate ratios were 0.29-0.35). With maturation, when animals weighed 100 g or more, about half continued this pattern of nutrient choice… (More)


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