Slimmers on Jabs Miss Protein Targets, Experts Warn

A recent study has revealed that nearly nine out of ten individuals using weight loss jabs are failing to consume adequate protein. This deficiency poses significant health risks, including hair loss, fatigue, and accelerated muscle loss. The research, conducted by scientists at the University of Milan, tracked over 300 slimmers and found that 88% of those on GLP-1 receptor agonists (GLP-1 RAs) fell short of recommended protein intake guidelines.

These popular weight loss jabs mimic a gut hormone to increase fullness and reduce appetite. However, this reduced food intake can make it difficult to obtain essential nutrients like protein. Experts highlight that without sufficient protein, even resistance exercise may not fully protect muscle mass. The study, which analyzed data from July 2025 to February 2026, noted that jab users consumed fewer calories and lower amounts of protein, carbohydrates, and fats compared to non-users.

Researchers pointed out that many patients using GLP-1 RAs receive little systematic guidance on diet quality or protein intake. This lack of information is concerning, especially as protein requirements may be higher for individuals with obesity or during active weight loss. The study's findings will be presented at the European Congress on Obesity in Istanbul next month, underscoring the need for personalized nutritional advice alongside weight loss treatments.

Weight loss jabs, originally developed for diabetes, have become highly sought after for slimming purposes. Celebrities have publicly endorsed their use. However, the study also acknowledged limitations, such as self-reported dietary data and jab usage, suggesting further research is needed to explore the impact on other nutrients and how mobile apps can support healthy habits.