Abstract
There is an inverse relationship between nicotine administration and body weight. Previous research indicates that this relationship results partially from effects of nicotine on energy intake. The present research includes two animal studies designed to investigate the effects of chronic nicotine administration on biochemical responses that affect energy utilization. The results indicate that chronic nicotine administration is accompanied by significant decreases in circulating insulin levels. Nicotine increases levels of catecholamines, but this effect is short-lived. The effects of nicotine on insulin are consistent with the conclusion that nicotine administration increases energy utilization.
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