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A comment on Study: people who eat and exercise the same as people 20 years ago are fatter. Parent comment

Re:Study: people who eat and exercise the same as people 20 ... by damian2000 on Thursday October 01, 2015 @03:25AM (#10309717)
Smoking reduces your appetite, leading to less eating and less weight.

http://www.npr.org/2011/06/09/137085989/the-skinny-on-smokin...

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Re:Study: people who eat and exercise the same as people 20 ... by jacobolus on Thursday October 01, 2015 @03:46AM (#10309795)
Nicotine (without smoking) also has that effect, even in low doses.

Actually there are two parts: it reduces appetite, and also raises the resting metabolic rate, cf. e.g. http://www.ncbi.nlm.nih.gov/pubmed/2773833

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