Energy balance
Very Low-Calorie Diets (VLCDs) defined as ≤800 kcal/day with high-biologic-value protein produce significantly greater short-term weight loss (1.5-2.5 kg/week) compared to standard low-calorie diets (LCDs, 1200 kcal/day), but long-term weight maintenance is poor and not superior to LCDs when behavioral therapy is included.
If you are severely obese (BMI >30) and have failed standard diets, a VLCD (≤800 kcal/day) with high protein can help you lose weight much faster (approx. 20kg in 12-16 weeks) than a standard 1200 kcal diet. However, you must combine this with behavioral therapy and exercise, as VLCDs alone do not prevent weight regain long-term. This must be done under medical supervision to manage risks like gallstones.
Weight loss on VLCDs averages 1.5 to 2.5 kg/wk; total loss after 12 to 16 weeks averages 20 kg. These results are superior to standard low-calorie diets of 5020 kJ/d (1200 kcal/d), which lead to weight losses of 0.4 to 0.5 kg/wk and an average total loss of only 6 to 8 kg... Long-term maintenance of weight lost with VLCDs is not very satisfactory and is no better than with other forms of obesity treatment.
Why this rating
Based on a comprehensive review of multiple controlled clinical trials and multicenter evaluations by a National Task Force.
Source
Very Low-Calorie Diets
Richard L. Atkinson · JAMA · 1993
DOI 10.1001/jama.1993.03510080071034
Related findings · Energy balance
- Achieving a total body weight loss of 10-15% (or >10-15 kg) through Total Diet Replacement (TDR) induces remission of Type 2 Diabetes in individuals with short-duration disease.Strong
- Bariatric surgery is superior to medical management alone for inducing significant long-term weight loss, remission of type 2 diabetes, and reduction in mortality for patients with BMI ≥ 40 or ≥ 35 with comorbidities.Strong
- Achieving type 2 diabetes remission requires significant weight loss (≥15 kg) via major caloric restriction, independent of macronutrient composition.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →