GLP-1 medications have moved from being primarily associated with type 2 diabetes treatment to becoming widely discussed for chronic weight management. The drugs, which act on pathways involving the hormone glucagon-like peptide-1, can reduce appetite and slow digestion, helping some people lose weight when prescribed and used appropriately. However, gastroenterologist Dr Saurabh Sethi has highlighted that starting a GLP-1 medication involves more than simply taking a drug for weight loss. Diet, hydration, exercise and attention to changes in the body are important considerations before and during treatment.

One of the first things people considering GLP-1 medication should understand is that these drugs are prescription medicines, rather than a quick fix for losing weight. Their use should be based on an individual’s health status and medical requirements, with a healthcare professional determining whether treatment is appropriate. The growing popularity of GLP-1 drugs, particularly on social media and among celebrities, has contributed to their image as “miracle” weight-loss medicines. That perception can overlook the need for medical supervision and lifestyle measures alongside medication.

Sethi also stresses the importance of maintaining adequate nutrition while taking GLP-1 drugs. Because these medications can reduce appetite, people may naturally eat less than they did before. While reduced calorie intake can contribute to weight loss, consistently eating too little can make it harder to meet the body’s nutritional requirements. A balanced diet containing adequate protein, vegetables, fruits, whole grains and other nutrient-dense foods can help support overall nutrition during weight management. Paying attention to protein intake can be particularly relevant because preserving lean muscle is an important part of healthy weight loss.

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Hydration is another consideration before starting treatment. GLP-1 medications can affect the digestive system, and some people experience symptoms such as nausea, vomiting, diarrhoea or constipation. Such symptoms can make it more difficult to maintain normal fluid intake. Drinking enough fluids throughout the day can therefore be an important part of managing treatment, particularly when appetite and food intake have changed. People experiencing persistent or severe gastrointestinal symptoms should discuss them with their healthcare provider rather than attempting to manage significant side effects on their own.

Exercise also remains important even when medication is being used for weight management. Losing weight does not automatically mean that all of the weight lost is body fat, making physical activity an important component of a broader approach. Regular movement, including resistance or strength-based exercise where appropriate, can support muscle maintenance while a person is losing weight. The specific type and intensity of exercise should depend on a person’s existing fitness, health conditions and physical capabilities. Medication can assist with appetite and weight management, but it does not replace the benefits of an appropriate diet and regular physical activity.

Finally, anyone considering a GLP-1 medication should understand that treatment requires ongoing monitoring and individualisation. The appropriate medicine, dose and treatment plan can vary depending on a person’s medical history, weight-management goals and response to treatment. The increasing visibility of these medicines can make them appear straightforward, but their effects extend beyond appetite and body weight, particularly because the gastrointestinal system is involved. Before starting a GLP-1 drug, people should discuss potential benefits, side effects, nutritional needs, hydration and exercise with a qualified healthcare professional. Used under appropriate medical guidance and alongside sustainable lifestyle measures, GLP-1 medications can form part of a broader weight-management strategy rather than serving as a standalone solution.

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