ProzisDiet blend
Prozis Zero Diet Whey
Prices checked . Label checked .
Prozis Zero Diet Whey costs £1.23 per 25g of protein in the 1.5kg pack (£72.37 at Prozis). That makes it the 16th cheapest of 21 reviewed animal-protein powders with a live price. It is a diet blend with 98g of protein per 100g and 20.6g in a 21g scoop, on the manufacturer's label.
- Best for
- People cutting who want a shake with 2g of carbohydrate and 0.7g of fat per 100g.
- Skip if
- You are comparing powders on protein per 100g, or you avoid soy.
- Watch out
- The 98g protein claim counts added amino acids; the whey content is nearer 74g per 100g.
- Protein / 100g
- 98g
- Per 21g scoop
- 20.6g
- Per 25g protein
- £1.23
- 1.5kg pack
- £72.37
Our verdict on Prozis Zero Diet Whey
Prozis Zero Diet Whey suits someone cutting who wants a very low carbohydrate, very low fat shake with vitamins and digestive enzymes added. Read the protein figure carefully. The label claims 98g per 100g only because L-glutamine, glycine and L-arginine, about a quarter of the declared protein, are counted in it. The whey itself works out nearer 74g per 100g. It also contains soy lecithin. Judge it on the whey, not the headline number.
How the price compares
Prozis Zero Diet Whey against the 3 reviewed powders nearest to it on type and price, on cost per 25g of protein. Each figure is that product’s best in-stock partner listing, packs of 400g and over.
| Product | Type | Protein / 100g | Per 25g protein |
|---|---|---|---|
| PhD Nutrition Diet Whey | Diet blend | 68g | £1.10 |
| Applied Nutrition ISO XP | Whey isolate | 90g | £1.18 |
| Prozis Zero Diet Whey | Diet blend | 98g | £1.23 |
| MyProtein Impact Diet Whey | Diet blend | 59g | £1.44 |
Where to buy Prozis Zero Diet Whey
Live prices from partner retailers, one row per retailer at its best value pack, ordered by cost per 25g of protein. A bigger pack usually costs less per 25g, so compare like for like.
| Retailer | Pack size | Price | Per 25g protein | Go to retailer |
|---|---|---|---|---|
| Prozis | 1.5kg | £72.37 | £1.23 | View deal ↗ |
Sold in 750g, 1.5kg. One partner retailer stocks a 400g or larger pack.
Pros and cons
Pros
- 2g of carbohydrate and 0.7g of fat per 100g on the label
- Isolate and hydrolysate whey rather than concentrate
- Adds 12 vitamins and a digestive enzyme complex
- Buyers who name it are positive about it
Cons
- The 98g per 100g protein figure includes about 4.9g of added amino acids per serving
- Contains soy lecithin
- Sugars, saturates and salt are not on the current panel we could read
- No third-party testing claim found
Nutrition and ingredients
From the manufacturer’s published label (Source). A "protein blend" that is 95% of the powder, with free amino acids counted alongside the whey. It also adds 12 vitamins, guar and xanthan gum and a DigeZyme digestive enzyme complex.
The label says 98g of protein per 100g (20.58g per 21g serving). That counts 2.06g of L-glutamine, 2.06g of glycine and 0.82g of L-arginine per serving, about a quarter of the declared protein. By our arithmetic the whey itself is about 15.6g per serving, roughly 74g per 100g. Older labels said 92g to 93g per 100g.
| Nutrient | Per 100g | Per 21g |
|---|---|---|
| Protein | 98g | 20.6g |
| Energy | 406 kcal | 85 kcal |
| Carbohydrate | 2g | 0.4g |
| of which sugars | Not published | - |
| Fat | 0.7g | 0.1g |
| of which saturates | Not published | - |
- Protein sources
- Whey protein isolate (milk), Whey protein hydrolysate (milk), L-glutamine, Glycine, L-arginine
- Sweeteners
- Sucralose
- Emulsifier
- Soy lecithinThe allergen line lists milk and soy, so this is not a soy-free product.
- Pack sizes
- 750g, 1.5kg
- Flavours
- Cookies and Cream, Chocolate Brownie, Vanilla, Cappuccino and White Chocolate-Raspberry.
- Third-party testing
- Informed Sport: no evidence found. Neither Prozis nor any retailer page we read claims Informed Sport or Informed Choice testing, and we found no Prozis listing in the public Informed Sport search. Drug-tested athletes should choose a batch-tested product instead.
- Made by
- Prozis, a Portuguese sports nutrition brand founded in 2007 (PROZIS.COM, S.A., Madeira)We could not confirm which Prozis company is named on UK packs.
What the maker does not publish
- Prozis does not say how much of the declared protein is intact whey; our 74g per 100g estimate subtracts the listed amino acids.
- The current panel we could read does not give sugars, saturates or salt. An older label listed 0g sugars and 0.4g saturates per 100g.
Method: nutrition figures come from the manufacturer label. Cost per 25g of protein is the pack price divided by the grams of protein in the pack, multiplied by 25.
What buyers say
Quoted word for word and linked, so you can read the full review or thread.
Recurring themes
- The few buyers who name it are positive, and one uses it in yoghurt as well as shakes.
- Across Prozis reviews generally, fast delivery is the most praised point and price rises are the most common complaint.
“Love the Zero Whey protein powder - I add it to my yogurt.”
“Their proteins Zero are really good.”
Quick answers
Does Prozis Zero Diet Whey really have 98g of protein per 100g?
Only as labelled. The figure includes added L-glutamine, glycine and L-arginine, about 4.9g per serving. The whey itself is nearer 74g per 100g by our arithmetic.
How much protein is in a scoop of Prozis Zero Diet Whey?
20.58g per 21g serving on the label, of which about 15.6g is whey and the rest added amino acids.
Does Prozis Zero Diet Whey contain soy?
Yes. The emulsifier is soy lecithin, and the allergen line lists milk and soy.
Is Prozis Zero Diet Whey good for cutting?
Yes, on macros. It has 2g of carbohydrate and 0.7g of fat per 100g. Compare it on cost per 25g of protein, remembering the amino acid caveat.
Is there a Prozis discount code?
Yes. WHEYWISE takes 10% off at prozis.com. Prices on this page are shown before the code.
Alternatives to Prozis Zero Diet Whey
MyProtein
Impact Diet Whey
A simpler formula, whey protein concentrate (milk) and milk protein concentrate and whey protein isolate (milk) only.
£1.44 / 25g protein
PhD Nutrition
Diet Whey
A simpler formula, whey protein concentrate and milk protein and whey protein isolate only.
£1.10 / 25g protein
PER4M Nutrition
Isolate Zero
A simpler formula, whey protein isolate only.
£1.15 / 25g protein
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Label and copy last reviewed 26 October 2026 · Prices last fetched 14 October 2026