The Protein Boom: Are High-Protein Supermarket Products Worth It?

Protein has spread from the sports aisle to almost every shelf in UK supermarkets, with protein yoghurts, bars, crisps, cereals and milkshakes now sitting right next to the regular versions. Some are worth buying, especially protein yoghurts and skyr, but many cost far more per gram of protein than eggs, milk, tinned fish or beans, and some bring a fair amount of sugar along with them.

The trend shows up in the research too. A late-2025 survey by Action on Sugar, based at Queen Mary University of London, found that more than half of the supermarket snack bars it looked at carried a protein claim, while 37% would be rated high in sugar on a traffic-light label. This guide shows you how to read a protein label in about 30 seconds, which products tend to earn their place in your basket, and the everyday foods that give you the same protein for less.

Why is protein suddenly in everything?

Protein has a strong reputation with anyone who trains, and for good reason: it contributes to the growth and maintenance of muscle, and protein-rich meals tend to keep people feeling full. Food brands have noticed how much shoppers care about it, and adding protein lets a product carry a bold claim on the front of the pack.

There is nothing wrong with that in itself. The questions are price and what comes with the protein. A protein version of a product often costs noticeably more than the standard one, and the extra protein can be quite small once you look at a normal portion. The label tells you which is which, as long as you know where to look.

What does 'high protein' on a UK label actually mean?

In Great Britain, a food can call itself a 'source of protein' when at least 12% of its calories come from protein, and 'high protein' when at least 20% do. Those rules are about the share of calories, not the amount in your portion. A small pot or a light bag of crisps can pass the 'high protein' test while giving you fewer grams than two eggs.

So the claim on the front tells you a product passed a test. The nutrition panel on the back tells you whether it is worth buying. If you want portion-by-portion protein figures for everyday foods, our UK supermarket guide to high-protein snacks for training has a full table.

How do you read a protein label in 30 seconds?

Turn the pack over and check these five things, in this order:

• Protein per serving. This is the number that matters. If a product is sold on protein, around 15 to 20g or more per serving is a sensible benchmark for a snack that has a job to do after training. A few grams is a top-up, not a protein snack.
• Sugar per 100g. On UK traffic-light labels, more than 22.5g of total sugars per 100g is high and 5g or less is low. Yoghurts and milk drinks always show some sugar because milk contains its own, which the NHS does not count as free sugar, so check the ingredients list for added sugar too.
• Saturated fat and salt per 100g. More than 5g of saturated fat or more than 1.5g of salt per 100g counts as high. In the same survey, 55% of snack bars would be rated high in saturated fat, and savoury protein snacks can be salty.
• Price per 20g of protein. Divide the price by the grams of protein in the pack, then multiply by 20. It sounds fiddly, but it is the quickest way to compare a protein bar with a tub of yoghurt or a box of eggs.
• The ingredients list. Some bars and desserts use sweeteners or sugar alcohols such as maltitol. Plenty of people are fine with them, but larger amounts upset some stomachs, so start with one and see how you get on.

How do you work out the price per gram of protein?

Here is a worked example with rough figures. Say a single protein yoghurt costs £1 and contains 15g of protein. That is about 6.7p per gram, or roughly £1.33 for 20g. A 1kg tub of plain skyr at around £3.20, with roughly 100g of protein in the whole tub, works out at about 3.2p per gram, or around 64p for 20g. It is the same kind of food at about half the price per gram, and you choose your own fruit.

Your phone calculator does the job in seconds, and after a few shops you will start to spot good and poor value at a glance. Supermarket shelf labels often show a price per 100g, which helps, but price per gram of protein is the fairer comparison when protein is the reason you are buying.

Which high-protein products are worth it?

Here is how the main categories compare. The costs are rough estimates based on typical UK supermarket shelf prices in October 2026, and individual products vary a lot.

Rough estimates from typical UK supermarket prices in October 2026, rounded. Prices, offers and recipes change, so check the pack and the shelf label.

The pattern is fairly clear. Protein yoghurts and granola can be reasonable value. Drinks and bars are mostly charging for convenience. Protein crisps are the most expensive way to buy protein on the list, and you would need two bags to reach 20g.

When are protein products genuinely useful?

They earn their place when they solve a real problem, for example:

• You train straight after work and will not eat a proper meal for a few hours. A protein drink or yoghurt in your bag bridges the gap.
• You are travelling or out all day and the alternatives are pastries and crisps.
• You are swapping a snack you would eat anyway. A protein yoghurt instead of a dessert, or protein granola instead of a sugary cereal, is a fair upgrade.
• You find it hard to eat enough protein across the day, and a convenient option helps you stay consistent.

They are less useful when they replace proper meals, when they push fruit, vegetables and fibre off your plate, or when you already eat a decent portion of protein at each meal. If you want to know your own daily target, our guide to how much protein you need to build muscle walks through it by bodyweight.

What are the cheaper whole-food swaps?

Everyday foods give you the same protein for a fraction of the price. Here is roughly what 20g of protein costs from some of the best-value options.

Rough estimates from typical UK supermarket prices in October 2026 and standard food composition figures, rounded. Check the pack you buy.

A few easy swaps to try:

• Instead of a protein bar: a pot of plain skyr with a banana, or two boiled eggs and a piece of fruit.
• Instead of a protein milkshake: a big glass of cold milk, or milk blended with a banana and a spoonful of peanut butter.
• Instead of protein crisps: a handful of edamame beans or roasted chickpeas, or a tuna sandwich if you need a proper refuel.
• Instead of a protein pudding: plain Greek yoghurt or skyr with a little honey and some berries.

Baked beans and some tinned foods can be salty, so the reduced-salt versions are worth a look. If you are weighing up a tub of protein powder instead, our beginner's guide to protein shakes covers when one actually helps.

Do you need protein products to get fitter?

No. Protein matters, but it is one piece of a bigger picture. Turning up to training consistently, following a plan that progresses sensibly, sleeping well and eating enough food overall will make a much bigger difference than whether your snack says 'protein' on the front. If you are training hard and eating too little, extra protein will not fix it.

A simple approach works for most people: build each main meal around a protein food, add plenty of plants and some carbs to fuel your training, and use protein products only when they genuinely make life easier. If you have a medical condition, follow a special diet or have been told to limit protein, check with your GP or a registered dietitian before changing what you eat.

If the training side is the part you want sorted, Edge puts running, strength, HIIT and mobility into one plan, so your sessions work together instead of competing. Edge Pro gives you a fully personalised plan, ready within 24 hours, plus a real coach you can message anytime, and it syncs with Strava, Garmin, Apple Health and Coros. It starts with a 7-day free trial, which needs a card, and you will be joining 20,000+ members.

This article is general guidance, not medical advice. If you are new to exercise, returning from injury, or managing a health condition, speak to your GP before starting, and see a physio for any niggle that does not settle.