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Safety of alternate day fasting and effect on disordered eating behaviors.
Nutr J. 2015 May 06; 14:44.NJ

Abstract

BACKGROUND

Alternate day fasting (ADF; ad libitum intake "feed day" alternated with 75% restriction "fast day"), is effective for weight loss, but the safety of the diet has been questioned. Accordingly, this study examined occurrences of adverse events and eating disorder symptoms during ADF.

FINDINGS

Obese subjects (n = 59) participated in an 8-week ADF protocol where food was provided on the fast day. Body weight decreased (P < 0.0001) by 4.2 ± 0.3%. Some subjects reported constipation (17%), water retention (2%), dizziness (<20%), and general weakness (<15%). Bad breath doubled from baseline (14%) to post-treatment (29%), though not significantly. Depression and binge eating decreased (P < 0.01) with ADF. Purgative behavior and fear of fatness remained unchanged. ADF helped subjects increase (P < 0.01) restrictive eating and improve (P < 0.01) body image perception.

CONCLUSIONS

Therefore, ADF produces minimal adverse outcomes, and has either benign or beneficial effects on eating disorder symptoms.

Authors+Show Affiliations

Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. khoddy2@uic.edu.Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. ckroeg@uic.edu.Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. jtrepa2@uic.edu.Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. abarno1@uic.edu.Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. sbhuta1@uic.edu.Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Room 506 F, Chicago, IL, 60612, USA. varady@uic.edu.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25943396

Citation

Hoddy, Kristin K., et al. "Safety of Alternate Day Fasting and Effect On Disordered Eating Behaviors." Nutrition Journal, vol. 14, 2015, p. 44.
Hoddy KK, Kroeger CM, Trepanowski JF, et al. Safety of alternate day fasting and effect on disordered eating behaviors. Nutr J. 2015;14:44.
Hoddy, K. K., Kroeger, C. M., Trepanowski, J. F., Barnosky, A. R., Bhutani, S., & Varady, K. A. (2015). Safety of alternate day fasting and effect on disordered eating behaviors. Nutrition Journal, 14, 44. https://doi.org/10.1186/s12937-015-0029-9
Hoddy KK, et al. Safety of Alternate Day Fasting and Effect On Disordered Eating Behaviors. Nutr J. 2015 May 6;14:44. PubMed PMID: 25943396.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Safety of alternate day fasting and effect on disordered eating behaviors. AU - Hoddy,Kristin K, AU - Kroeger,Cynthia M, AU - Trepanowski,John F, AU - Barnosky,Adrienne R, AU - Bhutani,Surabhi, AU - Varady,Krista A, Y1 - 2015/05/06/ PY - 2014/11/27/received PY - 2015/04/15/accepted PY - 2015/5/7/entrez PY - 2015/5/7/pubmed PY - 2016/1/20/medline SP - 44 EP - 44 JF - Nutrition journal JO - Nutr J VL - 14 N2 - BACKGROUND: Alternate day fasting (ADF; ad libitum intake "feed day" alternated with 75% restriction "fast day"), is effective for weight loss, but the safety of the diet has been questioned. Accordingly, this study examined occurrences of adverse events and eating disorder symptoms during ADF. FINDINGS: Obese subjects (n = 59) participated in an 8-week ADF protocol where food was provided on the fast day. Body weight decreased (P < 0.0001) by 4.2 ± 0.3%. Some subjects reported constipation (17%), water retention (2%), dizziness (<20%), and general weakness (<15%). Bad breath doubled from baseline (14%) to post-treatment (29%), though not significantly. Depression and binge eating decreased (P < 0.01) with ADF. Purgative behavior and fear of fatness remained unchanged. ADF helped subjects increase (P < 0.01) restrictive eating and improve (P < 0.01) body image perception. CONCLUSIONS: Therefore, ADF produces minimal adverse outcomes, and has either benign or beneficial effects on eating disorder symptoms. SN - 1475-2891 UR - https://www.unboundmedicine.com/medline/citation/25943396/Safety_of_alternate_day_fasting_and_effect_on_disordered_eating_behaviors_ L2 - https://nutritionj.biomedcentral.com/articles/10.1186/s12937-015-0029-9 DB - PRIME DP - Unbound Medicine ER -