Very-low-calorie diet

Very-low-calorie diets often consist of liquid drinks made from fresh fruits and vegetables, although very-low-calorie meals also exist.

A very-low-calorie diet (VLCD), also known as semistarvation diet[1] and crash diet,[2][3][4][5][6][7] is a type of diet with very or extremely low daily food energy consumption. VLCDs are defined as a diet of 800 kilocalories (3,300 kJ) per day or less.[8][9] Modern medically supervised VLCDs use total meal replacements, with regulated formulations in Europe and Canada which contain the recommended daily requirements for vitamins, minerals, trace elements, fatty acids, protein and electrolyte balance. Carbohydrates may be entirely absent, or substituted for a portion of the protein; this choice has important metabolic effects.[10][11] Medically supervised VLCDs have specific therapeutic applications for rapid weight loss, such as in morbid obesity or before a bariatric surgery, using formulated, nutritionally complete liquid meals containing 800 kilocalories or less per day for a maximum of 12 weeks.[8][12][13][14]

Unmonitored VLCDs with insufficient or unbalanced nutrients can cause sudden death by cardiac arrest either by starvation or during refeeding.[15][16]

  1. ^ Ahmed, W; Flynn, MA; Alpert, MA (April 2001). "Cardiovascular complications of weight reduction diets". The American Journal of the Medical Sciences (Review). 321 (4): 280–4. doi:10.1097/00000441-200104000-00007. PMID 11307868.
  2. ^ "How to diet". nhs.uk. NHS. 27 April 2018.
  3. ^ "Take the test: Is an 800-calorie diet right for me?". BBC Food.
  4. ^ Bonet, Anna (28 November 2018). "Are crash diets ever a good idea for weight loss?". Netdoctor. 'A crash diet is typically a very low-calorie diet, where you eat a very restrictively for a short period of time,' explains Registered Dietician, Helen Bond.
  5. ^ Joshi, S; Mohan, V (November 2018). "Pros & cons of some popular extreme weight-loss diets". The Indian Journal of Medical Research. 148 (5): 642–647. doi:10.4103/ijmr.IJMR_1793_18. PMC 6366252. PMID 30666989.
  6. ^ "Crash dieting: Desperate measures". The Independent. 15 September 2009.
  7. ^ "Crash diets can cause transient deterioration in heart function". ScienceDaily. 2018-02-02.
  8. ^ a b Thorell, A; MacCormick, AD; Awad, S; Reynolds, N; Roulin, D; Demartines, N; Vignaud, M; Alvarez, A; Singh, PM; Lobo, DN (September 2016). "Guidelines for Perioperative Care in Bariatric Surgery: Enhanced Recovery After Surgery (ERAS) Society Recommendations". World Journal of Surgery (Professional society guidelines). 40 (9): 2065–83. doi:10.1007/s00268-016-3492-3. PMID 26943657.
  9. ^ Holderbaum, M; Casagrande, DS; Sussenbach, S; Buss, C (February 2018). "Effects of very low calorie diets on liver size and weight loss in the preoperative period of bariatric surgery: a systematic review". Surgery for Obesity and Related Diseases (Systematic review). 14 (2): 237–244. doi:10.1016/j.soard.2017.09.531. PMID 29239795.
  10. ^ Cite error: The named reference Thom2017 was invoked but never defined (see the help page).
  11. ^ Howard AN (1981). "The historical development, efficacy and safety of very-low-calorie diets". International Journal of Obesity. 5 (3): 195–208. PMID 7024153.
  12. ^ "Obesity: identification, assessment and management of overweight and obesity in children, young people and adults". nice.org.uk. NICE. November 2014. Retrieved 30 September 2019.
  13. ^ US Department of Health and Human Services. (2017). "2015–2020 Dietary Guidelines for Americans - health.gov". health.gov. Skyhorse Publishing Inc. Retrieved 30 September 2019.
  14. ^ Jensen, MD; Ryan, DH; Apovian, CM; Ard, JD; Comuzzie, AG; Donato, KA; Hu, FB; Hubbard, VS; Jakicic, JM; Kushner, RF; Loria, CM; Millen, BE; Nonas, CA; Pi-Sunyer, FX; Stevens, J; Stevens, VJ; Wadden, TA; Wolfe, BM; Yanovski, SZ; Jordan, HS; Kendall, KA; Lux, LJ; Mentor-Marcel, R; Morgan, LC; Trisolini, MG; Wnek, J; Anderson, JL; Halperin, JL; Albert, NM; Bozkurt, B; Brindis, RG; Curtis, LH; DeMets, D; Hochman, JS; Kovacs, RJ; Ohman, EM; Pressler, SJ; Sellke, FW; Shen, WK; Smith SC, Jr; Tomaselli, GF; American College of Cardiology/American Heart Association Task Force on Practice, Guidelines.; Obesity, Society. (24 June 2014). "2013 AHA/ACC/TOS guideline for the management of overweight and obesity in adults: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and The Obesity Society". Circulation. 129 (25 Suppl 2): S102-38. doi:10.1161/01.cir.0000437739.71477.ee. PMC 5819889. PMID 24222017.
  15. ^ Isner JM, Sours HE, Paris AL, Ferrans VJ, Roberts WC (December 1979). "Sudden, unexpected death in avid dieters using the liquid-protein-modified-fast diet. Observations in 17 patients and the role of the prolonged QT interval". Circulation. 60 (6): 1401–12. doi:10.1161/01.cir.60.6.1401. PMID 498466.
  16. ^ Sours HE, Frattali VP, Brand CD, Feldman RA, Forbes AL, Swanson RC, Paris AL (April 1981). "Sudden death associated with very low calorie weight reduction regimens". The American Journal of Clinical Nutrition. 34 (4): 453–61. doi:10.1093/ajcn/34.4.453. PMID 7223697.