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Type "the most effective way to lose weight" into a search bar and you'll get a million answers, each louder than the last. But I'd gently change the question. Instead of the fastest way, let's ask about the easiest, most lasting, most effective way to actually feel fit — because being fit means having healthy muscle and a healthy body, not just a smaller number on the scale.
Why "fastest" is the wrong goal
Shock diets, three-day detoxes and liquid fasts can drop the number on the scale quickly, but most of what you lose is water and muscle. You end up lighter, yes — but also weaker, more tired and low on energy, and it almost never lasts. A strong, healthy body at a slightly higher weight will always look and feel better than a depleted one. So the goal isn't to lose fast; it's to lose well.
1. The Mediterranean pattern — start here
Year after year, the Mediterranean way of eating comes out on top, and reviews of the research back that up for both weight and heart health. It's built on vegetables, pulses, wholegrains, olive oil, fish and moderate portions of dairy and eggs — so it naturally delivers fibre, antioxidants, healthy fats and protein, and tends to calm inflammation rather than feed it. If you don't know where to begin, begin here. It suits the large majority of people (though never quite everyone — nutrition is always individual).
2. Intermittent fasting — if it fits your day
Eating within a set window — for example, all your food across about eight hours — can work as well as calorie counting for many people. Part of the benefit is simply cutting the late-night grazing that adds up when your metabolism is winding down, and giving your digestion a proper rest overnight. But there's a big "if": it only helps when the timing genuinely fits your life. If the eating window clashes with work, family or your natural rhythm and leaves you stressed — or so worried about going hungry that you overeat while the window is open — fasting can backfire. In that case, a Mediterranean or another balanced approach is the kinder choice.
3. Enough protein — the quiet essential
Across the world, most people eat less protein than they need. Aiming for roughly one gram per kilogram of body weight a day — so about 60g if you weigh 60kg, and more if you do regular resistance or weight training (up to around 1.5g/kg) — is one of the most useful things you can do. Protein keeps you fuller for longer and helps protect your muscle while you lose fat. Spreading it across your meals, rather than piling it into one, works best.
What about a "calorie deficit"?
You'll see the phrase everywhere, and it's true that an energy deficit still underlies fat loss. But newer research suggests it isn't only about counting: when you eat and how you spread your protein through the day seem to matter too, and the evidence here is still developing. The practical takeaway is simple — if your portions are very large, reining them in is valuable; if everything else is in place, look at your activity levels and, if needed, your blood work.
Still can't shift the weight?
If you're doing all of this and the scale won't move, in my experience there's usually a well-worn habit hiding in plain sight, or something in your blood work — a sluggish thyroid, a deficiency, a value that needs correcting — quietly slowing things down. That's worth exploring with a professional rather than pushing harder on a plan that isn't the issue.
The most effective method, in the end, is the healthy one you can actually keep. Start with a Mediterranean plate, get enough protein, and shape the rest around your real life — not the other way around.
This article is for general information and isn't a substitute for individualised advice from your own doctor or dietitian.
Merve Tığlı, Dietitian
Sources: Effect of Mediterranean Diets on Cardiovascular Risk Factors in Overweight and Obese Adults — systematic review and meta-analysis (2024); The Effects of Isocaloric Intermittent Fasting vs Daily Caloric Restriction — systematic review, Journal of the Academy of Nutrition and Dietetics (2022); The role of protein in weight loss and maintenance — American Journal of Clinical Nutrition.