Peptide-based weight loss works by regulating appetite and fat metabolism:

1. Mechanism of action: Peptides act on the brain's satiety center to reduce food intake while promoting fat breakdown and utilization.

2. Precautions: Long-term use may lead to malnutrition; it should be combined with diet and exercise, and a doctor should be consulted before use.

3. Monitoring methods: Effectiveness and risks can be assessed through blood biochemistry tests and measurements of blood glucose and lipid levels.