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Low calorie dieting increases cortisol.
Psychosom Med 2010; 72(4):357-64PM

Abstract

OBJECTIVE

To test the hypothesis that dieting, or the restriction of caloric intake, is ineffective because it increases chronic psychological stress and cortisol production--two factors that are known to cause weight gain; and to examine the respective roles of the two main behaviors that comprise dieting--monitoring one's caloric intake and restricting one's caloric intake--on psychological and biological stress indicators.

METHODS

In a 2 (monitoring vs. not) x 2 (restricting vs. not) fully crossed, controlled experiment, 121 female participants were assigned randomly to one of four dietary interventions for 3 weeks. The monitoring + restricting condition tracked their caloric intake and restricted their caloric intake (1200 kcal/day); the monitoring only condition tracked their caloric intake but ate normally; the restricting only condition was provided 1200 kcal/day of food but did not track their calories, and the control group ate normally and did not track their intake. Before and after the interventions, participants completed measures of perceived stress and 2 days of diurnal saliva sampling to test for cortisol.

RESULTS

Restricting calories increased the total output of cortisol, and monitoring calories increased perceived stress.

CONCLUSIONS

Dieting may be deleterious to psychological well-being and biological functioning, and changes in clinical recommendations may be in order.

Authors+Show Affiliations

Robert Wood Johnson Foundation Health and Society Scholars Program, University of California, San Francisco, San Francisco, California 94118, USA. tomiyamaj@chc.ucsf.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

20368473

Citation

Tomiyama, A Janet, et al. "Low Calorie Dieting Increases Cortisol." Psychosomatic Medicine, vol. 72, no. 4, 2010, pp. 357-64.
Tomiyama AJ, Mann T, Vinas D, et al. Low calorie dieting increases cortisol. Psychosom Med. 2010;72(4):357-64.
Tomiyama, A. J., Mann, T., Vinas, D., Hunger, J. M., Dejager, J., & Taylor, S. E. (2010). Low calorie dieting increases cortisol. Psychosomatic Medicine, 72(4), pp. 357-64. doi:10.1097/PSY.0b013e3181d9523c.
Tomiyama AJ, et al. Low Calorie Dieting Increases Cortisol. Psychosom Med. 2010;72(4):357-64. PubMed PMID: 20368473.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Low calorie dieting increases cortisol. AU - Tomiyama,A Janet, AU - Mann,Traci, AU - Vinas,Danielle, AU - Hunger,Jeffrey M, AU - Dejager,Jill, AU - Taylor,Shelley E, Y1 - 2010/04/05/ PY - 2010/4/7/entrez PY - 2010/4/7/pubmed PY - 2010/7/16/medline SP - 357 EP - 64 JF - Psychosomatic medicine JO - Psychosom Med VL - 72 IS - 4 N2 - OBJECTIVE: To test the hypothesis that dieting, or the restriction of caloric intake, is ineffective because it increases chronic psychological stress and cortisol production--two factors that are known to cause weight gain; and to examine the respective roles of the two main behaviors that comprise dieting--monitoring one's caloric intake and restricting one's caloric intake--on psychological and biological stress indicators. METHODS: In a 2 (monitoring vs. not) x 2 (restricting vs. not) fully crossed, controlled experiment, 121 female participants were assigned randomly to one of four dietary interventions for 3 weeks. The monitoring + restricting condition tracked their caloric intake and restricted their caloric intake (1200 kcal/day); the monitoring only condition tracked their caloric intake but ate normally; the restricting only condition was provided 1200 kcal/day of food but did not track their calories, and the control group ate normally and did not track their intake. Before and after the interventions, participants completed measures of perceived stress and 2 days of diurnal saliva sampling to test for cortisol. RESULTS: Restricting calories increased the total output of cortisol, and monitoring calories increased perceived stress. CONCLUSIONS: Dieting may be deleterious to psychological well-being and biological functioning, and changes in clinical recommendations may be in order. SN - 1534-7796 UR - https://www.unboundmedicine.com/medline/citation/20368473/full_citation L2 - http://Insights.ovid.com/pubmed?pmid=20368473 DB - PRIME DP - Unbound Medicine ER -