Ad disclosure. This page contains affiliate links. If you buy through one, we may earn a commission at no extra cost to you. Written for adults aged 18+. Not medical advice.

WeighLess Product picks Ad

A plain-English guide for the UK

Losing weight, without the nonsense.

What the evidence and the NHS actually say. The habits that do the heavy lifting. And the small number of products that are worth your money. No miracle pills, no injections, and no promises about how fast.

  • No fat burners
  • No jabs
  • No detox teas
  • No before and after photos
30g

of fibre a day is what the NHS recommends. Most adults in the UK manage about 20g.

1x

a week is how often to weigh yourself. Same day, same time. Watch the trend, ignore the Tuesday.

150

minutes of moderate activity a week is the NHS target. A brisk 20 minute walk on most days gets you there.

1

fibre with an authorised weight loss claim in Great Britain: glucomannan, and only alongside a lower calorie diet.

Updated 13 September 2026 Reviewed against the CAP Code and the GB health claims register Reading time about 12 minutes
01

Start here: the basics that actually matter

There is one idea underneath every diet that has ever worked, and it is not glamorous. Over weeks and months, you take in a little less energy than your body uses. Keep that up and weight comes off. Stop, and it comes back. Every plan you have heard of, from keto to fasting to counting points, is just a different way of making that gap easier to live with.

That is the whole secret. It is also why so many attempts fail. The problem is rarely the method. The problem is keeping it going on a wet Tuesday in November when you are tired, the kids are shouting and the biscuits are right there. The best plan is the one you can still follow when life is dull or annoying.

So we do not push a single diet on this page. We focus on the handful of habits that make the gap easier to hold: eating enough protein, getting more fibre than most people in Britain manage, moving a bit more than you do today, and watching the trend rather than the number on any one morning.

How fast should it go? The NHS publishes guidance on what a safe, sustainable rate looks like, and we would rather you read that than take a figure from us. What we will say is this: slow feels frustrating in week two and looks brilliant in month six.

Build every meal around one proper source of protein. The rest gets easier.
02

Protein: the habit most people skip

Ask people what they changed when they finally lost weight and kept it off, and protein comes up again and again. There are two reasons. Meals with a decent amount of protein tend to keep you fuller for longer, so the gap between lunch and dinner stops feeling like a punishment. And when you are eating less, protein helps your body hold on to muscle while the rest goes. That matters more than it sounds. Muscle is what lets you carry the shopping, climb the stairs and keep moving as you get older.

Food comes first. Eggs, Greek yoghurt, lentils, tinned fish, chicken thighs, cottage cheese, tofu, a proper portion of beans on toast. Building each meal around one of those covers most people. If you want a target, the British Nutrition Foundation publishes sensible guidance, and your GP or a registered dietitian can give you a number that fits your situation.

A protein powder is not a requirement. It is a convenience. It helps on the mornings when breakfast is a coffee and a panic, or after a walk when you would otherwise reach for whatever is nearest. Treat it as a food that happens to come in a tub, nothing more.

What the label is allowed to say

"Protein contributes to the maintenance of muscle mass" and "protein contributes to a growth in muscle mass". Those are the authorised claims in Great Britain. Anything about burning fat or speeding up your metabolism is not on the list, and you should read it as a warning sign.

Our protein picks Ad

Chosen on taste, how well they mix, ingredients and price per serving. Prices change, so check the merchant.

Whey

MyProtein Impact Whey

The one most people start with. Mixes clean in water or milk, comes in more flavours than anyone needs, and the unflavoured version is good for porridge. About 20g protein per scoop.

Check price Ad
Vegan

Bulk Vegan Protein Powder

Pea and brown rice blend, so the amino acid profile is complete. Slightly thicker texture than whey. Chocolate and salted caramel are the safe bets.

Check price Ad
Clear

MyProtein Clear Whey Isolate

Looks and drinks like squash rather than a milkshake. Useful if creamy shakes put you off, and it goes down easily after a walk in warm weather.

Check price Ad
Cheap, filling, boring in the best way. Fibre is the easiest win on this page.
03

Fibre and feeling full

The NHS recommends 30g of fibre a day for adults. Most people in the UK get around 20g. That gap is one of the easiest wins on this whole page, because fibre-rich foods are cheap, filling and boring in the best way. Oats, lentils, chickpeas, wholemeal bread, frozen peas, apples with the skin on, a tin of beans. None of it is exciting. All of it helps you stop eating when you have had enough.

One supplement deserves a special mention because it is the only fibre with an authorised weight loss claim in Great Britain: glucomannan, a fibre from the konjac root. It swells in water and takes up space in your stomach. The claim is specific, the dose matters, and it only applies alongside a diet that is already lower in calories. It is not a shortcut. It is a small help with a very clear label.

A word on safety, because it is required and because it is true. Glucomannan must be taken with plenty of water. Anyone who has difficulty swallowing should not take it. If you have a digestive condition, ask your pharmacist first.

The authorised claim, word for word

"Glucomannan in the context of an energy restricted diet contributes to weight loss. The beneficial effect is obtained with a daily intake of 3g of glucomannan in three doses of 1g each, together with 1 to 2 glasses of water, before meals." A warning of choking must be given for people with swallowing difficulties or when taking it with too little fluid.

Fibre picks Ad

Capsules are easier to dose correctly. Powder is cheaper per gram but harder to get right.

Glucomannan

Konjac glucomannan capsules

Look for 500mg capsules so that two capsules give the 1g dose before each main meal. Take with a large glass of water and do not skip the water.

Check price Ad
Psyllium

Psyllium husk powder

A plain source of fibre for people who struggle to hit 30g from food. No weight loss claim on this one. Stir into yoghurt or porridge and drink water with it.

Check price Ad
04

Meal structure, and when a shake makes sense

Most overeating in Britain is not about greed. It is about having no plan at six o'clock. You get home, nothing is ready, and the quickest option wins. The fix is dull and it works: decide your default meals in advance. Three or four breakfasts you rotate. Two lunches you can make with your eyes shut. A batch of something on Sunday that covers two dinners. Boring on paper, and a relief in practice.

Meal replacement shakes fit into that plan in one specific way. On the days when a proper meal is not going to happen, a shake that is designed to replace a meal is a better outcome than a garage sandwich and a bag of crisps. The authorised claim in Great Britain is for replacing two of your main meals a day as part of a lower calorie diet, and only for products that meet the rules on what a meal replacement has to contain.

What we would not suggest is replacing every meal with shakes. That is a different kind of programme, it needs supervision, and it is not something to start from a web page. Two a day at most, food for the rest, and talk to your GP if you are thinking of anything stricter.

The authorised claim, word for word

"Substituting two of the main daily meals of an energy restricted diet with meal replacements contributes to weight loss." The product has to meet the legal composition rules for meal replacements for the claim to apply.

Meal replacement picks Ad

Judged on taste, how filling they are, and whether the nutrition label reads like a meal rather than a dessert.

Powder

Huel Black Edition

Higher protein, lower carbohydrate version of the standard Huel. Thick, oaty, and genuinely keeps you going through an afternoon. Vanilla and chocolate are the ones to try first.

Check price Ad
Shakes

Exante meal replacement shakes

Single sachets, so the dose is fixed and there is nothing to measure. Wide flavour range and formulated specifically as a meal replacement.

Check price Ad
Measure the trend, not the day. Then lace up and go anyway.
05

Track what matters, ignore the rest

Your weight moves around by a surprising amount from one day to the next. Salt, a big meal, a long walk, a poor night's sleep, where you are in your cycle. None of that is fat, and none of it is worth a bad mood. So weigh yourself once a week, same day, same time, before breakfast, and write it down. Then look at the trend over a month. The trend is the truth. The Tuesday number is noise.

Two other things are worth measuring. A tape around your waist once a month tells you something the scale cannot. And for two weeks, not forever, keep a food diary. Not to judge yourself. Just to see. Most people are surprised by one thing, and that one thing is usually the easiest change they make all year.

You do not need to buy anything for this. The NHS app is free and does the weekly check-in for you. A decent set of scales just makes the habit a bit more pleasant, and a kitchen scale ends the argument about what a portion of rice actually is.

Tracking picks Ad

Nothing here changes your weight. It just makes watching the trend easier.

Bathroom scale

Withings Body smart scale

Syncs to your phone over wifi, so your weekly number lands in a graph without you doing anything. Handles several people in one household.

Check price Ad
Kitchen scale

Salter digital kitchen scale

Flat, wipe-clean, and accurate to the gram. Use it for two weeks and you will never need to weigh pasta again, because you will know.

Check price Ad
You do not need a gym. You need a pair of shoes and somewhere to go.
06

Move more, realistically

You do not have to join a gym. You do not have to run. If the word "workout" makes you want to lie down, skip it, because the most useful movement for most people is walking, and the second most useful is the stuff that happens without a plan: taking the stairs, getting off a stop early, pottering in the garden, standing up while the kettle boils.

The NHS guidance for adults is around 150 minutes of moderate activity a week, plus something that works your muscles on two days. That sounds like a lot until you break it into a brisk 20 minute walk on most days. Start with ten minutes if that is what you have. Ten minutes done is worth more than an hour planned.

The muscle part matters more than people think, especially while losing weight. A few sets of squats to a chair, some presses against a wall, a resistance band pulled across the chest. None of it needs equipment, but a band set makes it easier to do at home in front of the telly, and a tracker on your wrist turns "I should walk more" into a number you can actually watch go up.

A note on comfort

If you are carrying a lot of extra weight, choose movement that is kind to your joints: walking, swimming, cycling, chair-based strength work. Nothing here should hurt. If it does, stop and ask a physio or your GP.

Movement picks Ad

Cheap, small, and the kind of thing you will actually use in a living room.

Bands

Resistance band set with handles

Five or so levels of resistance, a door anchor, and a bag to keep it in. Covers rows, presses, squats and most of what a beginner needs at home.

Check price Ad
Tracker

Fitbit Inspire

Steps, sleep and heart rate without the price of a full smartwatch. Battery lasts about a week. The step count nudge is the reason to buy it.

Check price Ad
Nobody does this alone. Your GP, a pharmacist and the NHS are on your side.
07

When to speak to your GP

Everything above is general advice for adults who want to lose some weight and keep it off. Some situations need more than a web page, and there is no shame in that. The NHS defines obesity as a body mass index of 30 or over, and many people in that range also live with conditions like type 2 diabetes, high blood pressure or joint pain. If that is you, or if your BMI is 27 or over and you have one of those conditions, please book an appointment with your GP.

That conversation is worth having for a simple reason. Your GP can refer you to the NHS Digital Weight Management Programme, which is free, and can explain every option the NHS offers, including medical ones. We do not cover prescription treatments on this site and we do not link to anyone who sells them. That is a decision about your health and it belongs with a clinician who knows your history.

You should also speak to a GP before changing how you eat if you are pregnant or breastfeeding, if you have ever had an eating disorder, if you take regular medication, or if you are already at a low weight. A pharmacist is a good first stop for questions about any supplement on this page.

08

Questions people actually ask

What is a realistic pace of weight loss?

It depends on the person, the starting point and what else is going on with your health. The NHS publishes guidance on what a safe and sustainable rate looks like, and we would rather you read that than take a number from a website. Steady is the word. If a plan promises fast, walk away from it.

Do I need supplements to lose weight?

No. Food, movement and sleep do the work. A protein powder or a fibre supplement can make a habit easier to keep up, but nothing on this page is required and none of it works on its own.

Do fat burners work?

No fat burner ingredient has an authorised weight loss claim in Great Britain, and the evidence behind most of them is thin at best. Green tea extract, garcinia, raspberry ketones, apple cider vinegar gummies: none of them are on the register. We do not recommend them and we do not link to them.

What about weight loss injections?

They are prescription-only medicines. We do not cover them and cannot advertise them, and you should be wary of any site that does. If you want to know whether medical treatment is right for you, speak to your GP.

Is this guide for everyone?

It is written for adults aged 18 and over. It is not for anyone who is pregnant or breastfeeding, anyone with a history of disordered eating, or anyone who is already at a low weight. In those cases, please speak to a GP rather than following anything here.

How do you choose products and make money?

We earn a commission when you buy through some of the links marked "Ad". It does not change the price you pay. Nobody pays to be listed and we do not accept paid reviews. There is more in the section below on how we work.

09

Who writes this, and how I work

I am Charlotte Brown, and I write and edit everything on Weigh Less. I am not a doctor. I am someone who spent most of her thirties trying every plan going, then lost a fair bit of weight the slow way once I stopped looking for a shortcut. Since then I have spent years reading the research, testing the products and learning what the law actually lets a label say. I tell you when something is my opinion, and I send you to the NHS whenever the question is medical.

Products earn a place here on four things: what is actually in them, what the label is legally allowed to claim, what they cost per serving, and whether I would buy them again. I check the wording of every health claim against the Great Britain nutrition and health claims register before it goes on this page. If a product cannot be described honestly, it does not get listed.

I make money through affiliate links, which are always marked "Ad". When you buy through one, the retailer pays a small commission and you pay the same price. Nobody pays to be featured. If a retailer ever asked me to change what I say, I would remove the link rather than the sentence.