Grass-Fed Impact Whey Isolate, Vanilla Honey, 1 kg
£50.99 for 1 kg at Myprotein. That works out at £1.59 per 25 g protein, which ranks it 116th of the 123 whey protein isolate products we price across 6 UK retailers.
At one 25 g dose a day, this pack lasts 32 days. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 1000 ÷ 30 per serving = 33.3
- In the pack: 33.3 × 24 g = 800 g
- £50.99 ÷ 800 g × 25 g = £1.59 per 25 g protein
- A week £1.59 × 7 = £11.15 · a month × 30 = £47.80 · a year × 365 = £581.60
- 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 £2.81 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
- 24 g per serving (stated on the label)
- Pack
- 1 kg · 33.3 servings · 30 g a serving
- Cost per serving
- £1.53 (33.3 servings in the pack)
More label details
- Claimed on the listing
- vegetarian
- Sold by
- Myprotein
- What the listing says
- “1kg” · “Servings Per Container: 33” · “Serving Size: 30g” · “Protein ; 81g ; 24g”
Ingredients
Truly Grass Fed® Whey Protein Isolate (Milk) (95%) (contains Emulsifier (Sunflower Lecithin)), Natural Flavourings, 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: 30 g.
What you paid
Optional. At Myprotein today: £50.99.
“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
- £50.99Myprotein
- First recorded
- £50.993 Oct
- Checked on
- 1 daysince 3 Oct
Checked once so far, on 3 October 2026.
- First checked at Myprotein: £50.99
Questions about this product
How much does Myprotein Grass-Fed Impact Whey Isolate cost per 25 g protein?
£1.59 per 25 g protein, from £50.99 for 1 kg at Myprotein, checked on 2 October 2026.
Is it the cheapest whey protein isolate in the UK?
No, it is 116th of 123. Impact Whey Isolate Powder at Myprotein works out at 83p per 25 g protein.
How long does one pack last?
32 days at one 25 g dose. The pack holds 800 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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