Mixed
A Very Low-Calorie Ketogenic Diet (VLCKD) protocol, defined as <800 kcal/day with <50g carbohydrates, 1-1.5g protein/kg ideal body weight, and 15-30g fat, produces significant short- and long-term weight loss and superior fat mass reduction compared to standard low-calorie diets.
To use this protocol, you must follow a strict daily limit of under 800 calories with less than 50g of carbs, 15-30g of fat, and 1-1.5g of protein per kg of your ideal body weight. This is typically done for 8-12 weeks using meal replacements and supervised by a doctor. Expect significant weight and fat loss, superior to standard diets, but be prepared for mild, manageable side effects initially.
The VLCKD is characterized by a low carbohydrate content (< 50 g/day), 1–1.5 g of protein/kg of ideal body weight, 15–30 g of fat/day, and a daily intake of about 500–800 calories... when compared with other weight loss interventions of the same duration, the VLCKD showed a major effect on reduction of body weight, fat mass, waist circumference, total cholesterol and triglyceridemia as well as improved insulin resistance.
Why this rating
Based on a systematic review and meta-analysis of 15 studies (including RCTs) adhering to PRISMA guidelines, though heterogeneity exists.
Source
European Guidelines for Obesity Management in Adults with a Very Low-Calorie Ketogenic Diet: A Systematic Review and Meta-Analysis
Giovanna Muscogiuri et al. · Obesity Facts · 2021
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 →