Understanding weight
Is Obesity a Disease?
Understand how biology, health and everyday circumstances affect weight, and why long-term support can matter.
Understand obesity and long-term care →
For treatment information alongside these guides, see our weight loss medications overview.
Explore Weight Loss Medication Guides
Mounjaro
Guides covering side effects, dosage, diet plans, comparisons and practical support.
Wegovy
Guides covering treatment timelines, side effects, eligibility and support.
Weight-Loss Pills
Explore guides on oral weight-loss medicines, including Wegovy tablets, Foundayo and emerging treatment options.
New to Weight Loss Treatment? Start Here
Start with clear, practical information on how treatment works and its possible side effects, then use the calculators to understand your calorie needs and whether you may meet the usual starting criteria.
Beginner's guide
Weight Loss Injections Explained
Learn how GLP-1 weight loss injections work, how treatments differ and what to expect from assessment, results and side effects.
Understand weight loss injections →
Beginner's guide
Weight Loss Injection Side Effects
Understand the most common side effects, what may help and when symptoms need prompt or urgent medical advice.
Understand injection side effects →
Calculator
Weight Loss Medication Calorie Calculator
Estimate a practical daily calorie target using your height, weight, age and activity level.
Use the calorie calculator →
Calculator
BMI Weight Loss Calculator
Check your BMI and get an initial indication of whether you may meet the usual criteria for prescription treatment.
Use the BMI weight loss calculator →Diet & Lifestyle
Practical guidance on food, sleep, activity and sustainable habits that can support weight loss, whether you are using treatment or not.
Cost & Value
Practical advice to help you understand treatment costs, compare options and make a safe, informed decision.
New & Emerging Topics
Clear, clinically responsible coverage of developing weight-loss treatments, research and safety questions.
General Information Articles
06 Nov 2026
Is Obesity a Disease? Why Weight Loss Is More Than Willpower
Read more →
16 Oct 2026
Weight Loss Injections Explained: A Beginner’s Guide
A pharmacist-led beginner’s guide to weight loss injections, including how Mounjaro and Wegovy work, eligibility, side effects and what t...
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13 May 2025
Benefits of Weight Loss Injections Beyond Weight Loss
Read more →Supplements Articles
Usage & Storage
Helpful advice on using treatment correctly, including dosing, injection guidance, storage information and travelling with medication.
Results & Expectations
Information about expected weight loss timelines, treatment progress, clinical results and factors that may influence outcomes.
Explore More Weight Loss Guides
Is Obesity a Disease? Why Weight Loss Is More Than Willpower
Quick answer: Yes. The World Health Organization recognises obesity as a chronic disease, shaped by biology, behaviour and the environment. That does not mean every person with a higher BMI has the same health problems or needs medication. Assessment should...
Weight Loss Injections Explained: A Beginner’s Guide
A pharmacist-led beginner’s guide to weight loss injections, including how Mounjaro and Wegovy work, eligibility, side effects and what to expect from treatment.
Benefits of Berberine for Women
Quick answer: The potential benefits of berberine for women are mainly linked to blood sugar and cholesterol markers. Research in women with polycystic ovary syndrome, or PCOS, has also explored insulin resistance and some hormone-related outcomes. The evidence is still...
How to Eat in a Calorie Deficit
Quick answer: To eat in a calorie deficit without feeling constantly hungry, build most meals around lean protein, fibre-rich vegetables, fruit, legumes and wholegrains, then adjust portions so your overall intake stays below your maintenance calories. A moderate deficit that...
Calorie Deficit and Sleep: Can Eating Less Keep You Awake?Yes, a calorie deficit can make it harder to sleep for some people, especially if the deficit is too aggressive, meals are poorly timed, hunger is waking you up, or caffeine...
Retatrutide Side Effects: What the Trials Show
Quick answer: The most commonly reported Retatrutide side effects in clinical trials have been nausea, diarrhoea, constipation and vomiting. Some participants have also reported altered skin sensations, while an earlier trial found a temporary, dose-related increase in heart rate. Retatrutide...
How Often Should You Weigh Yourself on Mounjaro or Wegovy?
How often should you weigh yourself on Mounjaro or Wegovy? For most people, weighing once a week under similar conditions gives a useful picture of progress on Mounjaro or Wegovy. Choose the same day and roughly the same time, ideally...
Are Weight Loss Injections Worth It? UK Cost and Value Guide
Quick answer: Weight-loss injections can be worth it when they are clinically appropriate, affordable for the expected treatment period and supplied with reliable prescribing support. The value is personal. Compare the full monthly cost with what is included, how treatment...
Holiday Weight Gain: How to Get Back on Track
Quick answer: Holiday weight gain is often a mixture of extra food, alcohol, retained fluid and a change in routine. Return to regular meals, normal portions, hydration and everyday movement rather than trying to compensate with fasting or an extreme...