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Cheapest overallThe Bulk Protein Company
Serious Protein - 4kg75 bought this week
75bought this week85.6% protein · 25.7g / 25g serving
Bag · 4kg
£42.08
£0.31 / 25g protein
Whey Concentrate
Cheapest Whey Concentrate UK
Compare protein prices from MyProtein, Bulk, Optimum Nutrition and 85+ other UK retailers. Every product ranked by cost per 25g of protein. Free, updated weekly. Whether you are buying whey concentrate, whey isolate, vegan protein, casein, or a mass gainer, every bag is normalised to the same metric so you can compare across brands, sizes, and protein percentages without doing the maths yourself. No sponsored rows, no affiliate-biased rankings. The cheapest option sits at the top because it is the cheapest, not because a brand paid for placement.
128products tracked
98+retailers
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Hand-picked by our nutrition team every Monday, 07:00. Scored on £/25g protein, clean-label, and weekly velocity.
Showing 128 whey concentrate products
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About Whey Concentrate Protein
Whey concentrate is the most popular and affordable type of protein powder in the UK. It typically contains 70-80% protein by weight, with the remainder made up of naturally occurring fats, carbohydrates and lactose. For the majority of gym-goers and fitness enthusiasts, concentrate delivers everything you need at a fraction of the cost of isolate or hydrolysate.
Below you will find every whey concentrate product we track, sorted by price per 100g so you can see genuine value at a glance. Use the filters to narrow by brand or size, and compare like for like without the guesswork.
Not sure whether concentrate is right for you? It is the best choice if you want solid protein content at the lowest cost and you do not have lactose sensitivity. If you need lower lactose and higher protein purity, consider whey isolate instead. For plant-based options, see our vegan protein comparison.
Methodology
How we rank every bag.
Independent, transparent, and updated weekly. Here's what goes into each score.
01
Cost normalised to £/25g
Every bag divided by its true protein weight, so you see the real cost of a scoop across any size or brand.
02
Protein quality, not just %
Protein %, leucine and digestibility feed the Performance score. A 90% isolate and a 90% vegan blend are not the same.
03
Clean-label audit
Ingredient count, artificial sweeteners, added sugars, third-party certifications. 0 to 100 score.
04
Social and review signals
Weekly purchase volume and weighted review scores surface what people actually re-buy, not just what ranks on search.
Questions, answered.
Whey concentrate is the least processed form of whey protein, containing 70-80% protein along with some fat, lactose, and minerals. It is the most affordable type of protein powder and is widely used for general fitness and muscle recovery.