Impact Whey Isolate Powder, White Chocolate, 4.05 kg
£217.49 for 4.05 kg at Myprotein. That works out at £1.58 per 25 g protein, which ranks it 115th of the 123 whey protein isolate products we price across 6 UK retailers.
At one 25 g dose a day, this pack lasts 5 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 4050 ÷ 27 per serving = 150
- In the pack: 150 × 23 g = 3,450 g
- £217.49 ÷ 3,450 g × 25 g = £1.58 per 25 g protein
- A week £1.58 × 7 = £11.03 · a month × 30 = £47.28 · a year × 365 = £575.25
- 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 Reflex Nutrition pack saves £2.29 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
- 23 g per serving (stated on the label)
- Pack
- 4.05 kg · 150 servings · 27 g a serving
- Cost per serving
- £1.45 (150 servings in the pack)
More label details
- Claimed on the listing
- vegetarian
- Barcode
- 5059883571980
- Sold by
- Myprotein
- What the listing says
- “4.05kg” · “150servings” · “Per 27g” · “Protein ; 83g ; 23g”
Ingredients
Whey Protein Isolate (Milk) (97%) (contains Emulsifiers (Soya Lecithin, Sunflower Lecithin)), Flavourings (contain Milk), Sweetener (Sucralose).
From the Myprotein 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: 27 g.
What you paid
Optional. At Myprotein today: £217.49.
“Order by” allows 3 working days’ delivery from Myprotein and your spare days.
Price history
No price change since 3 October 2026. Checked on 1 day, most recently 3 October 2026.
- Price at every check
- £217.49Myprotein
- First recorded
- £217.493 Oct
- Checked on
- 1 daysince 3 Oct
Checked once so far, on 3 October 2026.
- First checked at Myprotein: £217.49
Questions about this product
How much does Myprotein Impact Whey Isolate Powder cost per 25 g protein?
£1.58 per 25 g protein, from £217.49 for 4.05 kg at Myprotein, checked on 2 October 2026.
Is it the cheapest whey protein isolate in the UK?
No, it is 115th of 123. Impact Whey Isolate Powder at Myprotein works out at 83p per 25 g protein.
How long does one pack last?
5 months at one 25 g dose. The pack holds 3,450 g in total.
About Myprotein
Founded 2004 · Manchester, England · Part of THG plc
Myprotein is a sports nutrition brand founded in 2004 by Oliver Cookson and bought in 2011 by The Hut Group, now the London-listed THG plc. It is based in Manchester and is part of THG's nutrition division.
All 558 Myprotein products, priced per doseVisit Myprotein (opens in a new tab)
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