Myprotein Impact Whey Isolate is a whey-protein isolate powder positioned for athletes and gym-goers who prioritise protein-per-serving and low calories. The product delivers 26g of protein in a 30g serving and contains 109 kcal, 0g fat, 0.8g carbohydrates and 0.5g sugar. It’s sold in 500g, 1kg, 2.5kg and 5kg sizes and offered in over 40 flavours including Vanilla, Chocolate Smooth and Salted Caramel, so it targets users wanting high-protein supplementation with a wide flavour choice.
This review is based on the product nutrition facts and specifications provided by the manufacturer, aggregated user feedback reported in product listings, and price comparisons from the market. I compared stated nutrition (26g protein, 109 kcal, 0g fat) against competing isolate products and referenced reported user complaints such as sensitivity to sucralose and unclear allergen labelling to form a practical assessment.
High-level verdict: Impact Whey Isolate is a nutritionally strong whey isolate — 26g protein per 30g serving and a very low calorie and fat profile — that mixes well and comes in many flavours. The best aspects are the protein-to-calorie ratio and availability in multiple sizes; the main drawbacks are the inclusion of the artificial sweetener sucralose, which some users report as a digestive issue, and reported confusion over allergen labelling on some packs.
How clean and concentrated is the protein?
Impact Whey Isolate provides 26g of protein per 30g serving (≈86.7% protein by weight per serving) and 109 kcal. The labelled macronutrient breakdown lists 0g fat, 0.8g carbohydrates and 0.5g sugar per serving, making it appropriate for low-carb, low-fat nutrition strategies where a high absolute protein dose is required.
That protein density positions it as a true isolate rather than a blend; users wanting maximum protein with minimal added calories get a clear benefit. The low sugar (0.5g) is helpful for those tracking carbohydrate intake, but note the use of artificial sweetener (sucralose) in many flavours.
Does it taste good across the range?
Myprotein offers Impact Whey Isolate in over 40 flavours, including commonly praised options like Vanilla and Chocolate Smooth. Those two flavours receive consistent positive feedback in listings, which suggests flavour development is strongest in the classic variants.
However, wide flavour ranges often include variable results; while Vanilla and Chocolate Smooth are singled out positively, individual experiences will vary by flavour choice. The abundance of options is a clear plus if you want variety or a specific taste profile.
Is it easy to mix and digest?
Users generally report that Impact Whey Isolate mixes well with liquids, producing few clumps with a shaker or blender. Good mixability across multiple flavours makes it practical for shakes, smoothies and recipe use where a smooth texture matters.
Digestive tolerance varies: the product contains sucralose, and some users report digestive issues related to artificial sweeteners. Anyone with known sensitivity to sucralose should test a small amount first or choose an unsweetened alternative.
How does the price compare to alternatives?
Price examples: 500g is listed at £23.49 (≈£46.98 per kg) and the product is marketed from about £1.22 per serving. That places it below some premium isolates but above the cheapest concentrates, offering competitive cost-per-gram of protein for an isolate.
Competitors to consider by price include Bulk Natural Pure Whey Isolate (£24.99/500g), Optimum Nutrition Gold Standard Whey Isolate (£27.99/500g) and Dymatize Nutrition ISO100 (£29.99/500g). This means Impact Whey Isolate is priced aggressively versus established brands while delivering comparable isolate-level nutrition.
Are there labeling or allergen concerns to watch?
The product is a milk-derived whey isolate and will contain milk allergens and may include soy traces depending on flavour formulations; the brief notes some users have reported unclear allergen labelling on packs. Anyone with milk or soy allergies should avoid the product unless they can confirm batch labelling directly with the manufacturer.
Separately, the presence of sucralose is an explicit ingredient in many flavours and is linked in user reports to digestive discomfort for a subset of consumers. If you are sensitive to artificial sweeteners, this product may not be suitable.
Pros & Cons
- ✅ 26g protein per 30g serving — high protein density for an isolate
- ✅ 109 kcal per serving with 0g fat, supporting low-calorie protein intake
- ✅ Low carbohydrates (0.8g) and low sugar (0.5g) per serving
- ✅ Available in over 40 flavours including Vanilla and Chocolate Smooth
- ✅ Generally mixes well with liquids according to user feedback
- ✅ Price from about £1.22 per serving and 500g at £23.49 (≈£46.98/kg)
- ❌ Contains the artificial sweetener sucralose, which some users report causes digestive issues
- ❌ Some users report unclear allergen labelling on packs — risk for milk/soy-allergic consumers
- ❌ As a milk-derived whey isolate it is unsuitable for people with milk or soy allergies
How It Compares to the Competition
- Bulk Natural Pure Whey Isolate — Similar isolate-style nutrition at a slightly higher 500g price (£24.99) — comparable option if you prefer Bulk's formulations.
- Optimum Nutrition Gold Standard Whey Isolate — Well-known brand at a higher 500g price (£27.99); ON is a mainstream alternative with established reputation.
- Dymatize Nutrition ISO100 — Premium isolate priced at £29.99 per 500g — often positioned as a higher-end option vs Myprotein's more competitive pricing.
Who Should Buy This & Who Should Skip It
Buy it if: Anyone seeking a high-protein, low-fat and low-sugar whey isolate to support muscle growth or recovery will find this product appropriate — it delivers 26g protein per 30g serving, 109 kcal and mixes well. Buyers wanting lots of flavour choices will appreciate the 40+ options and multiple package sizes (500g–5kg).
Skip it if: People sensitive to artificial sweeteners should avoid this product because it contains sucralose and has reported related digestive complaints. Anyone with milk or soy allergies should skip or verify batch allergen labelling with the manufacturer before purchasing.
Search Purchase Options
Use these links to search for Myprotein Impact Whey Isolate on trusted marketplaces. The links open in new tabs; if you buy through them, we may earn a commission at no extra cost to you.
* Affiliate links: you pay the same price either way.