Primary Treatment Targets for Very Low-Calorie Diet (VLCD) Protocol

Definition and Energy Parameters

• A VLCD is defined as a diet providing ≤800 kcal/day, typically requiring meal replacements as part of a structured program 3, 4
• VLCDs should be implemented for a short-term duration (12-16 weeks maximum), though they can be extended or used intermittently in specific clinical scenarios 3, 4

Weight Loss Targets

• Initial weight loss target of 15-20% within the first 4 months of treatment 1, 2
• VLCDs achieve greater initial weight loss compared to low-calorie diets (LCDs) 2

Metabolic and Health Targets

• Reduction in hepatic steatosis and liver fat 2
• Improvement in insulin sensitivity, which occurs before significant weight loss 2

Nutritional Targets

• Adequate vitamin, mineral, and trace element supplementation to prevent deficiencies 3, 4
• Consumption of meal replacements as part of a structured program to ensure nutritional adequacy 3, 4

Safety Monitoring Targets

• Close monitoring by experienced healthcare professionals (physician, nutritionist, or dietician) to prevent potential complications, particularly hypokalemia, dehydration, gallstones, and nutritional deficiencies 1, 3, 4
• Special caution in patients with coronary heart disease 1

Contraindications and Exclusions

• VLCDs are not recommended for children and adolescents, pregnant or lactating women, elderly patients, and patients with severe chronic kidney disease 3, 4

Long-term Management Targets

• Implementation of specific interventions to support weight maintenance after the VLCD phase 2, 3, 4
• Despite greater initial weight loss with VLCDs, long-term outcomes at 1 year are often similar to those achieved with LCDs 1, 2