Pure Whey Isolate, Unflavoured, 900 g
£44.99 for 900 g at Bulk. That works out at £1.44 per 25 g protein, which ranks it 9th of the 123 whey protein isolate products we price across 6 UK retailers.
At one 25 g dose a day, this pack lasts 31 days. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 900 ÷ 30 per serving = 30
- In the pack: 30 × 26 g = 780 g
- £44.99 ÷ 780 g × 25 g = £1.44 per 25 g protein
- A week £1.44 × 7 = £10.09 · a month × 30 = £43.26 · a year × 365 = £526.33
- Amount per serving: stated on the label.
The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.
Cheaper whey protein isolate
All 123, ranked →
Switching to the Myprotein pack saves £2.64 a month at the same 25 g dose.
Ranked purely by price per 25 g protein. 53 combination products also contain protein powder.
On the label
- Protein powder · Whey isolate
- 26 g per serving (stated on the label)
- Pack
- 900 g · 30 servings · 30 g a serving
- Cost per serving
- £1.50 (30 servings in the pack)
More label details
- Barcode
- 5055950628823
- Sold by
- Bulk
- What the listing says
- “900g” · “per serving (30g)” · “[Protein ; 87g ; 26g]”
Ingredients
Whey Protein Isolate (Milk), Emulsifier (Sunflower Lecithin).
From the Bulk listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
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One 25 g dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 30 g.
What you paid
Optional. At Bulk today: £44.99.
“Order by” allows 3 working days’ delivery from Bulk and your spare days.
Price history
No price change since 20 September 2026. Checked on 1 day, most recently 20 September 2026.
- Price at every check
- £44.99Bulk
- First recorded
- £44.9920 Sept
- Checked on
- 1 daysince 20 Sept
Checked once so far, on 20 September 2026.
- First checked at Bulk: £44.99
Questions about this product
How much does Bulk Pure Whey Isolate cost per 25 g protein?
£1.44 per 25 g protein, from £44.99 for 900 g at Bulk, checked on 20 September 2026.
Is it the cheapest whey protein isolate in the UK?
No, it is 9th of 123. Impact Whey Isolate Powder at Myprotein works out at 83p per 25 g protein.
How long does one pack last?
31 days at one 25 g dose. The pack holds 780 g in total.
About Bulk
Founded 2006 · Colchester, England
Bulk is a British sports nutrition company based in Colchester, Essex. Adam Rossiter and Elliot Dawes, who met at the University of Essex, started it in 2006 as Bulk Powders; it was renamed Bulk at the start of 2021, and the founders remain its majority owners.
All 133 Bulk products, priced per doseVisit Bulk (opens in a new tab)
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