Weight gains in rats of different ages after administration of insulin]

An experiment was made to examine the body weight gains after administration of deposit insulin (40 units per kg of live weight) in rats at the age of 1-12 days, 8-10 weeks and 18-20 weeks. The administration of insulin to suckling young (aged 11-12 days) did not influence the weight gains. Eight- to ten-week old rats showed a reduction and 18- to 20-week old rats showed a reduction and 18- to 20-week old rats an increase of weight gains in the course of the experiment.