GLP-1 receptor agonists such as semaglutide and tirzepatide have rapidly transformed the conversation around weight loss and metabolic health. While many people view these medications as “miracle injections,”
the reality is far more complex. Two individuals may take the same medication at the same dosage and still experience very different results.
Dr Pallavi Phatak, Senior Resident in Plastic Surgery, says, “This happens because human metabolism is highly individualised, and no two bodies respond to treatment in exactly the same way.”
GLP-1 medications work by slowing gastric emptying, reducing appetite, improving insulin sensitivity, and helping regulate blood sugar levels. However, the body’s response to these effects depends on several factors, including genetics, underlying metabolic health, lifestyle habits, sleep quality, stress levels, hormonal balance, and body composition.
For instance, patients with significant insulin resistance or metabolic dysfunction may respond differently compared to someone using these medications primarily for cosmetic weight loss. Similarly, individuals with higher muscle mass and healthier dietary habits may preserve their body composition more effectively during weight reduction.
“One of the most important yet less-discussed aspects of GLP-1 therapy is lifestyle support,” explains Dr Phatak. “These medications are not substitutes for proper nutrition, exercise, and healthy lifestyle practices.”
Patients consuming inadequate protein while losing weight rapidly may experience muscle loss, fatigue, hair thinning, and changes in facial volume, commonly referred to online as “Ozempic face.”
In aesthetic medicine, doctors are increasingly witnessing the impact of rapid weight loss on skin health and facial appearance. Significant fat loss within a short period can contribute to volume depletion, skin laxity, and a tired appearance in some individuals. This is why medically supervised weight loss should focus not only on the number on the scale, but also on long-term metabolic health and overall wellness.
Another important point is that these medications do not work at the same pace for everyone. Some patients experience dramatic appetite suppression within a few weeks, while others require gradual dose escalation and longer treatment durations before noticeable changes occur. Unrealistic expectations often lead to disappointment.
Dr Phatak also highlights that individuals opting for these medications must understand that there is a significant maintenance phase even after reaching their target weight. Patience and consistency remain essential for achieving sustainable and healthy results.
GLP-1 drugs are powerful tools in modern medicine, but they are not magic injections. Sustainable outcomes depend on a comprehensive approach that includes nutrition, resistance training, quality sleep, stress management, and proper medical supervision.
The future of weight management is likely to become increasingly personalised. Rather than asking why these medications work “better” for some individuals, we should recognise that every body responds differently, and effective treatment should reflect that.
