IsopureProtein Powders#7 of 34 in categoryRating 3.3/5

Isopure Zero Carb Whey Protein Isolate (Unflavoured)

Red flags

No major red flags on the label.

Green flags

  • Green flag: High protein (90g per 100g)
  • Green flag: No added sugar

Ingredients, decoded

2 listed
  • Whey Protein Isolate (100%)
  • Emulsifier (INS 322(i))
ConcernWorth watchingIn label order. Tap a highlighted one to learn more.

Nutrition per 100 g
CNutritionCIngredients2Risk
Energy369 kcal
Protein90 g
Carbohydrates1 g
Total sugars0.5 g
Added sugars0 g
Total fat0.5 g
Saturated fat0.3 g
Trans fat0 g
Cholesterol3 mg
Sodium178 mg
Highlighted values exceed FSSAI and UK FSA front of pack thresholds.

Our take

CleanPlate review

Whey isolate with 90 g protein and 0.5 g sugar

Isopure Zero Carb Whey Protein Isolate (Unflavoured) is a 500 g tub of whey protein isolate (100%) with an emulsifier (INS 322 i). One 28 g scoop gives 25 g of protein and the panel is printed per 100 g. The pack names zero carb, lactose free and gluten free.

CleanPlate scores it CC2. The C for nutrition is middling: 90 g protein per 100 g. The C for ingredients reflects mostly refined or industrial ingredients (led by whey protein isolate), and almost no additives. The 2 for risk is low: sodium, free sugar and saturated fat are all modest (sodium 178 mg, free sugar 0 g, saturated fat 0.3 g per 100 g).

Claims vs reality

What the pack says, checked against the ingredient list and nutrition panel.

  • On the pack

    “25g protein per serving”

    Holds

    90 g per 100 g in a 28 g scoop is 25.2 g of protein.

  • On the pack

    “Zero Carb”

    Holds

    Carbohydrate is 1 g per 100 g, about 0.3 g a scoop.

  • On the pack

    “Lactose Free”

    Be careful

    The panel prints 0.5 g total sugars per 100 g, which in whey is mostly lactose, and no lactose line, so the claim cannot be confirmed.

  • On the pack

    “Protein from 100% Whey Protein Isolate”

    Holds

    Whey protein isolate is the only protein source in the list.

How CC2 breaks down

Each grade is scored on its own. Here are the label numbers behind each one, per 100 g.

How we score →
01 Nutritional valueA to E
C

Adequate nutrient density

Protein
90 g
Fibre
Not declared
Vitamins and minerals
None declared
Energy
369 kcal

Scored on protein, fibre and twelve vitamins and minerals, against the Codex and FSSAI "source" and "high" levels, per 100 g and per 100 kcal.

02 Ingredient & label integrityA to E
C

Mixed processing and additives

Base
Whey Protein Isolate
Sweeteners
None added
Additives
1
Flagged
None

Scored on how processed the ingredients are, which additives are used and why, and whether the label keeps its promises.

03 Risk nutrients1 to 5
2

Low risk

Added sugar
0 g
Sodium
178 mg
Saturated fat
0.3 g
Trans fat
0 g

Scored on free sugar, sodium, saturated fat and trans fat, each weighed by how strong the evidence of harm is.

A closer look

Does the label add up?

Whey protein isolate (100%) with an emulsifier (INS 322 i).

Per 100 g: 369 kcal, 0.5 g fat of which 0.3 g saturated, 0.5 g sugar of which 0 g added, 90 g protein, 178 mg sodium. This is a 500 g pack of the same recipe as the 1 kg Isopure Unflavored tub already listed, with the same panel values. The pack carries a certification logo that is too small to read.

Ingredients to watch

  • EmulsifierWorth watching

    Lecithin (INS 322) costs 1 point in the additives score.

  • Concentrated proteinWorth watching

    A whey isolate is an industrial extract, which is why the ingredients grade is a C.

  • SodiumFine

    178 mg per 100 g, about 50 mg a scoop.

  • Sugar and fatFine

    0.5 g sugar and 0.5 g fat per 100 g.

Common misconceptions

Myth: "Zero carb means zero sugar"

The panel shows 0.5 g sugar per 100 g, about 0.1 g a scoop.

Myth: "Isolate means lactose free"

An isolate has little lactose, but the pack prints no lactose value to prove it.

How often, and how

  • Healthy adultsA scoop a day at most, if food protein falls short
  • ChildrenNot needed
  • Diabetes or prediabetesFine in moderation

Smarter ways to eat it

One scoop

A 28 g scoop is about 103 kcal with 25 g of protein and 50 mg of sodium.

Pack size

The 500 g tub gives 17 scoops, against about 35 in a 1 kg tub.

Common questions

Is Isopure Zero Carb Whey Protein Isolate (Unflavoured) healthy?

Isopure Zero Carb Whey Protein Isolate (Unflavoured) scores CC2 (Good) on CleanPlate, which makes it a reasonable choice with a trade-off or two worth knowing about. We found no major red flags on its label. On the plus side: High protein (90g per 100g); No added sugar.

What does the CC2 score mean?

The first letter (C) grades nutritional value: adequate nutrient density. The second letter (C) grades ingredient and label integrity: mixed processing and additives. The number (2) grades risk nutrients (sugar, sodium, saturated fat): low risk.

Last reviewed October 17, 2026. Scored with the CleanPlate method from the published label.

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