A new study was undertaken by Jie Li and colleagues from Harbin Medical University in China to compare the differences in chewing activities of obese and lean people. It also examined the effect of chewing on the concentration of hormones present in the gut and the total calorie intake. It was found that people who chew their food more, end up consuming fewer calories, which may help them control their weight.
The study which has been published in the American Journal of Clinical Nutrition found that one can reduce his calorie intake by as much as 12% by chewing food 40 times instead of a typical 15 times. A person can lose as much as 25 pounds in one year by reducing his daily calorie intake by 12%. This can translate into significant weight loss.
The study examined 16 lean and 14 obese young men. It investigated whether the chewing factors of obese subjects were different from those of lean subjects and what the effects of chewing on energy intake were. The researchers found that compared with lean participants, obese participants chewed there food less frequently and ate faster. The participants ate 12% less after 40 chews than after 15 chews. A relationship between the amount of chewing and levels of certain hormones which stimulate appetite in the brain was also found. It was seen that a higher chewing rate was associated with lower blood levels of ghrelin, a hormone that stimulates appetite, as well as higher levels of postprandial glucagon-like peptide 1 and cholecystokinin, hormones believed to reduce appetite.
According to Shuran Wang, a co-author of the study, future obesity therapies will be developed keeping an eye on the level of these hormones. Regulating these hormones may help people control their appetite. Although he concedes that chewing more is not a very feasible obesity prevention method, yet the relationship between eating behaviors and obesity is worth studying further to control the spread of obesity.
References:
- http://www.ajcn.org/content/early/2011/07/20/ajcn.111.015164.abstract
- http://in.reuters.com/article/2011/07/29/us-chewing-weightloss-idINTRE76S6OU20110729
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