Iso Whey Protein

by ESN

Pure protein, minimal extras: filtered for maximum protein content with very low fat and carbs per serving.

Up to 26g protein per serving
Low fat - under 3g per 100g
Low carb - suitable for keto and cutting diets
Extra filtered for reduced lactose
For shakes, smoothies, baking and more

FlavourMilky Hazelnut

Size1kg

Best price

In stock

£43.68

£4.37 / 100g

Secure retailer checkout

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Transparent protein profile

What's inside

Values per 100g, with the amount in one 30g serving

86g protein

25.8g per 30g serving with minimal filler

3g carbohydrates

1g per 30g serving - low carb

1g fat

0.2g per 30g serving - very lean

360 kcal

108 kcal per 30g serving

View full nutritional information

Nutrition per 100g and per 30g serving
Nutrient	Per 100g	Per serving (30g)
Protein	86g	25.8g
Calories	360 kcal	108 kcal
Carbohydrates	3.3g	1g
Fat	0.7g	0.2g

Know when to buy

Price history

Lowest price on record, any flavour or size

£4.24/100g (£42.41 for 1kg on 11 Oct 2026)

1kg · all flavours · price per pack

Amazon UKlatest £43.68, lowest £42.41, highest £46.40 in the last 90 days

Quick answers

Is this right for you?

Who is it for?

ESN Iso Whey Protein is designed for athletes, lean-bulk dieters, and anyone who wants maximum protein with minimal fat and carbs. Whey isolate is also a better option for people with mild lactose sensitivity, since the extra filtration removes most of the lactose.

What can you expect?

A lean, fast-absorbing protein with very low fat and carbohydrate content. Whey isolate goes through extra filtration to deliver 85-95% protein purity, which means more protein per scoop and fewer calories from filler. Expect quick absorption, making it ideal straight after a workout. With 86g of protein per 100g (around 26g per 30g serving), ESN Iso Whey Protein sits at the higher end for a whey isolate product.

What else do you need to know?

ESN Iso Whey Protein is a whey isolate protein powder made by ESN. It comes in 1kg sizes. Every price on WheyWise is read from the retailer’s own page and re-checked daily and sorted by cost per 100g, so you can see both the cheapest option and how current it is. All links to Amazon and retailer sites are affiliate links - this is how WheyWise stays free.

Frequently asked questions

Where is the cheapest place to buy ESN Iso Whey Protein in the UK?

We refresh ESN Iso Whey Protein pricing daily from Amazon UK and show the fetch time next to every figure. If no verified price is showing above, we do not currently hold one we would stand behind, and the buy button will take you to the live listing to check.

How much protein does Iso Whey Protein contain per 100g?

Iso Whey Protein contains 86g of protein per 100g, with 25.8g per 30g serving. It is a whey isolate product.

Is ESN Iso Whey Protein currently in stock?

At the last check, 1 out of 1 tracked variants was in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.