Achieving and maintaining a healthy weight is one of the most impactful things you can do for your long-term health. For many people, however, it is also one of the most challenging. At Mojo Pharmacy, we believe in evidence-based, compassionate support not quick fixes or fad diets.
This guide explains the key principles of safe and effective weight management, including when medication may be appropriate as part of a wider healthcare plan.
Why Weight Management Matters
Excess weight, particularly around the abdomen, is associated with an increased risk of several serious health conditions, including:
Type 2 diabetes
Cardiovascular disease and high blood pressure
Certain cancers
Sleep apnoea
Joint pain and osteoarthritis
Non-alcoholic fatty liver disease
Depression and reduced quality of life
Even a modest reduction in body weight of five to ten per cent can lead to clinically meaningful improvements in many of these conditions.
Understanding BMI and Its Limitations
Body Mass Index (BMI) is commonly used to assess whether a person’s weight is within a healthy range relative to their height. A BMI of 18.5 to 24.9 is considered healthy; 25 to 29.9 is classified as overweight; and 30 or above is classified as obese.
While BMI is a useful screening tool, it does have limitations. It does not account for muscle mass, bone density, ethnic differences in risk, or how weight is distributed. For example, people of South Asian descent may face increased health risks at lower BMI thresholds. For a more complete picture, waist circumference and other clinical factors are also important.
The Foundations of Healthy Weight Loss
Sustainable weight management is built on several pillars:
Nutrition
There is no single ‘best’ diet for weight loss. The most effective diet is one that creates a calorie deficit while being nutritionally balanced and, crucially, one you can maintain over time. General principles include:
Prioritising whole foods: vegetables, fruits, lean proteins, wholegrains, and healthy fats
Reducing ultra-processed foods, sugary drinks, and foods high in saturated fat and salt
Being mindful of portion sizes
Eating regular meals to help manage hunger
Crash diets and very low-calorie approaches can lead to rapid initial weight loss, but often result in muscle loss, nutrient deficiencies, and rebound weight gain. They should only be undertaken under medical supervision.
Physical Activity
Exercise supports weight loss by increasing energy expenditure and helps to preserve lean muscle mass during calorie restriction. UK guidelines recommend:
At least 150 minutes of moderate-intensity aerobic activity per week (e.g. brisk walking, cycling, swimming)
Strength training exercises on at least two days per week
Even small increases in activity can be beneficial. Finding forms of movement you enjoy makes consistency far more achievable.
Behaviour and Mindset
Sustainable change often requires addressing the psychological and behavioural aspects of eating. This can include identifying triggers for emotional eating, building awareness of hunger and fullness cues, and developing strategies to manage setbacks. Support from a healthcare professional, dietitian, or behavioural therapist can be invaluable.
Sleep and Stress
Both poor sleep and chronic stress can disrupt the hormones that regulate appetite and metabolism. Getting seven to nine hours of quality sleep per night and finding effective ways to manage stress are important, often-overlooked components of weight management.
When Medication May Be Appropriate
For some individuals, lifestyle changes alone are not sufficient to achieve meaningful weight loss, particularly for those with obesity or obesity-related health conditions. In these cases, weight management medication may be considered as part of a comprehensive treatment plan.
Prescription weight management medications available in the UK include GLP-1 receptor agonists such as semaglutide (Wegovy) and liraglutide (Saxenda). These medications work by mimicking a gut hormone that regulates appetite and blood sugar levels, helping people feel fuller sooner and eat less over time.
These medications are not suitable for everyone and are typically prescribed only to those who meet specific clinical criteria, including a BMI of 30 or above (or 27.5 or above with weight-related health conditions), and who have not been able to achieve sufficient weight loss through lifestyle changes alone.
Potential side effects include nausea, vomiting, diarrhoea, constipation, and headache — particularly when starting treatment. These often improve over time. More rarely, serious side effects can occur. A full medical assessment and ongoing monitoring are essential.
Important: Weight management medication must always be prescribed by a qualified prescriber following a thorough clinical assessment. It is not appropriate as a standalone treatment and should always be used alongside dietary changes and increased physical activity.
Realistic Expectations
Weight loss is rarely linear. Plateaus are common and entirely normal, and they do not mean your efforts are not working. Most clinical evidence suggests that a safe, sustainable rate of weight loss is approximately 0.5 to 1 kilogram per week.
Long-term weight maintenance is often more challenging than initial weight loss and requires continued effort, monitoring, and support. It is a journey, not a destination.
Who Can Help?
A range of healthcare professionals can support your weight management journey:
Your GP — for initial assessment, referral, and monitoring
A registered dietitian — for personalised nutritional guidance
A pharmacist — for information on medications, supplements, and ongoing support
A psychologist or behavioural therapist — for addressing the mental aspects of eating and lifestyle change
Structured weight management programmes — many NHS-commissioned services are available
If you have questions about weight management medications or would like to discuss your options, speak with one of our pharmacists. We are here to help you make informed decisions about your health.
Important Information
This article is for informational purposes only and does not constitute medical advice. Weight management medications are prescription-only and must be assessed and prescribed by a qualified healthcare professional. This article does not constitute a recommendation to use any specific medication. Always consult a qualified healthcare professional before starting any new medication, supplement, or health programme. Individual results may vary.
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