100% Whey Salted Peanut Caramel (Best before: 30/11/2026), 720 g
£17.99 for 720 g at Reflex Nutrition. That works out at 89p per 25 g protein, which ranks it 28th of the 160 whey protein concentrate products we price across 8 UK retailers.
At one 25 g dose a day, this pack lasts 20 days. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 720 ÷ 30 per serving = 24
- In the pack: 24 × 21 g = 504 g
- £17.99 ÷ 504 g × 25 g = 89.2p per 25 g protein
- A week 89.2p × 7 = £6.25 · a month × 30 = £26.77 · a year × 365 = £325.71
- 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 concentrate
All 160, ranked →
Switching to the Protein Works pack saves £4.10 a month at the same 25 g dose.
Ranked purely by price per 25 g protein. 54 combination products also contain protein powder.
On the label
- Protein powder · Whey concentrate
- 21 g per serving (stated on the label)
- Pack
- 720 g · 24 servings · 30 g a serving
- Cost per serving
- 75p (24 servings in the pack)
More label details
- Sold by
- Reflex Nutrition
- What the listing says
- “Salted Peanut Caramel” · “720g” · “Serving Size ; 30.0g” · “Protein ; 21.0g”
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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 Reflex Nutrition today: £17.99.
“Order by” allows 5 working days’ delivery from Reflex Nutrition and your spare days.
Price history
No price change since 23 September 2026. Checked on 2 days, most recently 9 October 2026.
- Price at every check
- £17.99Reflex Nutrition
- First recorded
- £17.9923 Sept
- Checked on
- 2 dayssince 23 Sept
- First checked at Reflex Nutrition: £17.99
Questions about this product
How much does Reflex Nutrition 100% Whey Salted Peanut Caramel (Best before: 30/11/2026) cost per 25 g protein?
89p per 25 g protein, from £17.99 for 720 g at Reflex Nutrition, checked on 9 October 2026.
Is it the cheapest whey protein concentrate in the UK?
No, it is 28th of 160. 100% Protein at Protein Works works out at 59p per 25 g protein.
How long does one pack last?
20 days at one 25 g dose. The pack holds 504 g in total.
About Reflex Nutrition
Founded 1996 · Brighton, England · Part of Associated British Foods
Reflex Nutrition is a British sports nutrition brand founded in 1996 by James Phillips. It makes its products at its own facility in Brighton. Associated British Foods bought the company in 2017, and Reflex is now sold by AB Sports Nutrition, a division of ABF Grain Products that also runs the HIGH5 brand.
All 24 Reflex Nutrition products, priced per doseVisit Reflex Nutrition (opens in a new tab)
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