Protein Works vs Myprotein: Which Is Cheaper in 2026?

Myprotein Impact Whey and Protein Works Whey Protein 360 are two of the most bought whey powders in the UK. Both brands sell direct from their own websites and run regular sales. For this comparison we checked the price and the nutrition label of each product on the brand's own website, then converted each one to cost per 25g of protein, so that different bag sizes and protein contents compare fairly.

Is Protein Works cheaper than Myprotein?

Yes. Protein Works Whey Protein 360 Black costs 75p per 25g of protein in the 1.2kg bag at £21.29. Myprotein Impact Whey costs £1.27 per 25g of protein in the 900g Vanilla bag at £32.99. That makes Protein Works Whey Protein 360 Black 41% cheaper per gram of protein than Myprotein Impact Whey.

The dearer Protein Works tier is cheaper too. Protein Works Whey Protein 360 Gold costs about 88p per 25g of protein in the 1.2kg bag at £28.29, which makes it about 31% cheaper per gram of protein than Myprotein Impact Whey.

Prices and nutrition labels on theproteinworks.com and myprotein.com, one-off purchase price with no code applied. Protein per 100g varies slightly by flavour. The Protein Works product cards can show the lower OnTap subscription price from our feed. Live prices for both brands are on the Myprotein vs Protein Works comparison.

Is Protein Works still cheaper in the largest bags?

Yes, though the gap is a little narrower. Protein Works Whey Protein 360 Black costs 71p per 25g of protein in the 4.8kg bag at £80.49. Myprotein Impact Whey costs £1.16 per 25g of protein in the 3.6kg bag at £119.99. That makes Protein Works Whey Protein 360 Black 39% cheaper per gram of protein than Myprotein Impact Whey in the largest bags. Protein Works Whey Protein 360 Gold costs about 75p per 25g of protein in the 4.8kg bag at £95.99.

Cheaper per gram of protein

Protein Works Whey Protein 360 Black

2.4kg bag

The cheapest way to buy protein of the three, for anyone who picks on price and value.

Buy Whey Protein 360 Black →Price at Protein Works

Exclusive WheyWise Code

WW12

Get 12% off your order

Search on Amazon ↗

or compare all UK prices →

Cheaper per gram of protein

Protein Works Whey Protein 360 Black

2.4kg bag

Pros

• + Costs 75p per 25g of protein in the 1.2kg bag
• + About 40% cheaper per gram of protein than Myprotein Impact Whey
• + Protein Works holds 4.7 out of 5 on Trustpilot from 53,046 reviews

Cons

• – Contains 59g of protein per 100g, the least of the three powders here
• – More sugar than Gold: 6.7g to 7.6g per 30g serving

Pros

• Costs 75p per 25g of protein in the 1.2kg bag
• About 40% cheaper per gram of protein than Myprotein Impact Whey
• Protein Works holds 4.7 out of 5 on Trustpilot from 53,046 reviews

Cons

• Contains 59g of protein per 100g, the least of the three powders here
• More sugar than Gold: 6.7g to 7.6g per 30g serving

Buy Whey Protein 360 Black →Price at Protein Works

Exclusive WheyWise Code

WW12

Get 12% off your order

Search on Amazon ↗

or compare all UK prices →

●Nutrition per scoop · 17.7g protein in 30g▼

Protein makes up 59%

of this 30g scoop · 109 kcal total

17.7g

7.5g

Protein17.7g

Carbs7.5g

Fat1g

Other3.8g

Which has more protein per 100g?

Myprotein Impact Whey has the most protein of the three. Myprotein Impact Whey contains 72g of protein per 100g in Vanilla, 73g in Chocolate Smooth and 75g in Unflavoured, according to the labels on myprotein.com. Protein Works Whey Protein 360 Gold contains 67g to 68g of protein per 100g, and Protein Works Whey Protein 360 Black contains 59g.

Per scoop, that works out at 22g to 23g of protein in a 30g serving of Myprotein Impact Whey, 20g in a 30g serving of Protein Works Whey Protein 360 Gold and 18g in a 30g serving of Protein Works Whey Protein 360 Black. If you want the most protein in each shake, Myprotein wins. If you want the cheapest protein overall, Protein Works still wins, because the cost per 25g of protein figures above already allow for the lower protein content.

Should you pick Protein Works Black or Gold?

Pick Protein Works Whey Protein 360 Black for price and value, and Protein Works Whey Protein 360 Gold for a more protein-dense shake with less sugar. Protein Works Whey Protein 360 Black costs 75p per 25g of protein against about 88p for Protein Works Whey Protein 360 Gold, both in the 1.2kg bag.

Figures from the Chocolate Silk and Vanilla Crème labels on theproteinworks.com. Either tier is still cheaper per gram of protein than Myprotein Impact Whey. For the whole Protein Works range, including the vegan and meal lines, read our Protein Works range guide.

Which has more flavours and bag sizes?

Myprotein wins clearly on choice. Myprotein Impact Whey has more than 40 flavours on myprotein.com, sold in packs from 15 to 120 servings (up to 3.6kg in Vanilla). Protein Works Whey Protein 360 Black comes in 5 flavours and Protein Works Whey Protein 360 Gold in 8, both in 600g, 1.2kg, 2.4kg and 4.8kg bags.

If you like to rotate flavours, or want a flavour Protein Works does not make, that range is Myprotein's strongest argument. It is also why so many Myprotein flavours appear in our best tasting protein powder guide.

More protein and more flavours

MyProtein Impact Whey Protein Powder

1kg bag

The pick for flavour choice and protein per scoop, best bought during a Myprotein sale.

Buy Impact Whey Protein Powder →Price at MyproteinView on Amazon ↗

or compare all UK prices →

More protein and more flavours

MyProtein Impact Whey Protein Powder

1kg bag

Pros

• + Contains 72g to 75g of protein per 100g depending on flavour, the most of the three powders here
• + More than 40 flavours, in packs from 15 to 120 servings
• + Myprotein holds 4.3 out of 5 on Trustpilot from 223,013 reviews

Cons

• – Costs £1.27 per 25g of protein in the 900g bag
• – About 69% dearer per gram of protein than Protein Works Whey Protein 360 Black in the 1.2kg bag at 75p

Pros

• Contains 72g to 75g of protein per 100g depending on flavour, the most of the three powders here
• More than 40 flavours, in packs from 15 to 120 servings
• Myprotein holds 4.3 out of 5 on Trustpilot from 223,013 reviews

Cons

• Costs £1.27 per 25g of protein in the 900g bag
• About 69% dearer per gram of protein than Protein Works Whey Protein 360 Black in the 1.2kg bag at 75p

Buy Impact Whey Protein Powder →Price at MyproteinView on Amazon ↗

or compare all UK prices →

●Nutrition per scoop · 21.6g protein in 30g▼

Protein makes up 72%

of this 30g scoop · 113 kcal total

21.6g

Protein21.6g

Carbs2.7g

Fat1.8g

Other3.9g

Which brand has better reviews?

Protein Works holds a 4.7 out of 5 TrustScore on Trustpilot from 53,046 reviews. Myprotein holds a 4.3 out of 5 TrustScore on Trustpilot from 223,013 reviews. Myprotein has far more reviews because it is the bigger retailer, but Protein Works scores higher.

Trustpilot rates the whole company, so these scores cover delivery, stock and customer service as well as the powder itself.

Do discount codes change the answer?

Sometimes, for a few days at a time. The prices in this guide are one-off prices with no code applied. Myprotein runs limited-time extra discounts on protein powders, applied automatically in the basket, and a deep one can close part of the gap to Protein Works while it lasts.

At Protein Works, code WW12 took 12% off both Protein Works Whey Protein 360 Black and Protein Works Whey Protein 360 Gold in our basket test on 22 September 2026, with no minimum spend. It cannot be combined with other codes, and its terms exclude Whey Protein 80 BLACK, Diet Whey Protein Isolate BLACK, bundles and gift vouchers. We track live codes for both brands on the deals page.

Should you buy Protein Works or Myprotein?

Buy Protein Works Whey Protein 360 Black if price per gram of protein is what matters most. Protein Works Whey Protein 360 Black is 41% cheaper per gram of protein than Myprotein Impact Whey, and Protein Works has the higher Trustpilot score.

Buy Myprotein Impact Whey if you want the most protein in each scoop, a particular flavour, or you catch a deep Myprotein sale. Buy Protein Works Whey Protein 360 Gold if you want to stay with Protein Works but prefer more protein and less sugar than Black.

For every whey on the market ranked by cost per 25g of protein, use the whey concentrate comparison, or put any two powders side by side with the protein comparison tool. Our Whey Protein 360 vs Impact Whey review covers ingredients and formulation in more depth. For other brands to consider instead of Myprotein, see Myprotein alternatives UK, and for why Myprotein's list prices look high in the first place, read why is Myprotein so expensive.

Frequently asked questions