Losing weight can feel confusing when every diet claims to be the best diet for weight loss. Yet the urgency is real—recent government data shows that in 2022–2023, around 64% of adults in England were estimated to be overweight or living with obesity, with 26% of adults classified as obese. That scale of excess weight is linked with serious health risks, making effective strategies like keto, vegan or intermittent fasting more than just trend diets—they may be essential tools in a national health challenge.
In this guide, we look at how each diet works, what research says about results, and how to find the right approach for your lifestyle.
What Is the Keto Diet, and How Does It Help with Weight Loss?
The keto diet weight loss plan is built around eating very few carbohydrates and more healthy fats. When carbs are limited, your body enters ketosis — a natural process where it burns fat for fuel instead of glucose.
How Effective Is Keto for Weight Loss?
Studies show people following a ketogenic plan often lose weight quickly in the first few months. This happens because lower insulin levels encourage fat burning and reduce appetite. However, long-term results depend on staying consistent and choosing nutrient-rich foods rather than relying on processed meats or butter-heavy meals.
Who Might Benefit Most from Keto?
Keto may suit those who prefer rich, filling foods such as fish, eggs, cheese, and avocados. It may not be ideal for anyone who struggles to limit bread, pasta, or fruit, as these are high in carbohydrates.
Is the Vegan Diet Good for Weight Loss?
A vegan diet weight loss approach removes all animal products — including meat, dairy, and eggs — and focuses on fruits, vegetables, legumes, and whole grains.
Why Vegan Diets Can Support Weight Loss
Plant-based foods are naturally high in fibre and low in calories, helping you feel full with fewer calories overall. Research published in Nutrition & Metabolism, 2025, found that participants following a low-fat vegan diet lost an average of 5.9 kg over 16 weeks, significantly more than those on a standard diet.
Health Benefits Beyond the Scales
Aside from helping with weight management, vegan diets have been linked to lower cholesterol and improved heart health. The main challenge is ensuring enough protein, iron, and vitamin B12 from plant or fortified sources.
Does Intermittent Fasting Work for Weight Loss?
Intermittent fasting weight loss plans focus on when you eat rather than what you eat. Common methods include the 16:8 plan (fasting for 16 hours, eating within 8) or the 5:2 approach (two low-calorie days each week).
How Fasting Affects the Body
During fasting periods, insulin levels drop, encouraging the body to burn stored fat. Evidence suggests that intermittent fasting can be as effective as continuous calorie restriction — and sometimes easier for those who dislike constant meal tracking.
Potential Drawbacks
Some people may feel dizzy or tired or overeat during eating windows. It’s important to stay hydrated and make balanced choices once you break the fast.
Which Is the Best Diet for Weight Loss in the UK?
There isn’t one single best diet for weight loss that suits everyone. The most successful plan is one you can maintain while keeping your body nourished.
- Choose keto if you enjoy high-fat meals and can give up most carbs.
- Go vegan if you prefer plant foods and want additional heart-health benefits.
- Try intermittent fasting if you find set eating windows easier than calorie counting.
Remember that lifestyle, existing conditions, and preferences all affect your success.
What’s the Fastest Way to Lose Weight Safely?
While it’s tempting to look for the fastest way to lose weight, healthy results come from small, consistent habits — not extreme restriction. Combining a balanced eating plan with regular movement, good sleep, and hydration will support long-term progress.
If you’re unsure which approach to take, our pharmacists can help assess your goals and suggest safe, effective options.
Start Your Weight-Loss Journey with Professional Guidance
Losing weight is never just about choosing a diet — it’s about understanding your body, your habits, and what’s realistic for your lifestyle. At Pharmacy To My Door, our pharmacists can help you find the most suitable and sustainable route for your goals. They can also advise on safe options, possible supplements, and any weight management treatments available through our consultation service.
Book a consultation with our pharmacist today at Pharmacy To My Door to start your personalised weight-loss journey. Together, we’ll help you take confident, informed steps towards a healthier you.
FAQs
How long does the keto diet weight loss effect last?
In most cases, keto leads to rapid initial weight loss (often water weight plus fat) in the first 4–12 weeks. Over time, weight loss slows, and maintaining results depends on consistency and diet quality.
Can vegan diet weight loss help reduce cholesterol?
Yes—a vegan plan rich in fibre and plant foods is linked with lower LDL (“bad”) cholesterol and improved heart health, beyond just weight reduction.
Does intermittent fasting weight loss work better than daily calorie cutting?
Intermittent fasting (such as 16:8 or 5:2) can yield similar weight loss to continuous calorie restriction, but many find it easier to sustain because they don’t count every snack.
Is combining keto and intermittent fasting a good strategy for weight loss?
Yes—combining keto and intermittent fasting may accelerate fat burning and deepen ketosis, but it can be restrictive and needs careful planning.
What diet is best for weight loss in the UK?
The best diet for weight loss in the UK is one that you can follow long-term. For many, starting with intermittent fasting or a balanced low-carb (not full keto) plan offers both flexibility and results.
What is the fastest way to lose weight safely without extreme diets?
The fastest safe path is a moderate calorie deficit, whole foods, regular physical activity, good sleep, and possibly structured eating (fasting windows or low-carb). Extreme restriction often leads to rebound weight gain.
