Soy Protein Isolate 90%
by Peak Supps
Plant-powered performance: a dairy-free protein source that delivers on taste, nutrition, and sustainability.
- Up to 27g protein per serving
- Low fat - under 3g per 100g
- Low carb - suitable for keto and cutting diets
- 100% plant-based and dairy-free
- For shakes, smoothies, baking and more
FlavourUnflavoured
Size5kg
Best price today
In stock£45.99
£0.92 / 100g
Secure retailer checkout
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Transparent protein profile
What's inside
Values per 100g, with the amount in one 30g serving
91g protein
27.3g per 30g serving with minimal filler
1g carbohydrates
Extremely low carbs - suitable for keto and low-carb diets
2g fat
0.6g per 30g serving - very lean
370 kcal
111 kcal per 30g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (30g) |
|---|---|---|
| Protein | 91g | 27.3g |
| Calories | 370 kcal | 111 kcal |
| Carbohydrates | 1g | 0.3g |
| Fat | 2.15g | 0.6g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£0.92/100g (£45.99 for 5kg on 17 Sept 2026)
5kg · all flavours · price per pack
- Amazon UKlatest £45.99, lowest £45.99, highest £45.99 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Peak Supps Soy Protein Isolate 90% is designed for plant-based athletes, vegans, and anyone looking to avoid dairy. It also suits people with lactose intolerance or those who prefer a more sustainable protein source without compromising on their daily protein targets.
What can you expect?
A plant-derived protein that delivers a complete amino acid profile without any animal products. Modern vegan proteins have come a long way in taste and texture. You can expect smooth mixing, solid protein content, and a product free from dairy, lactose, and cholesterol. With 91g of protein per 100g (around 27g per 30g serving), Peak Supps Soy Protein Isolate 90% sits at the higher end for a vegan product.
What else do you need to know?
Peak Supps Soy Protein Isolate 90% is a vegan protein powder made by Peak Supps. It comes in 5kg 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 Peak Supps Soy Protein Isolate 90% in the UK?
The best price we have verified today is £0.92 per 100g for the 5kg bag, checked 6 Oct 2026. Use the buy button above to go straight to it.
How much protein does Soy Protein Isolate 90% contain per 100g?
Soy Protein Isolate 90% contains 91g of protein per 100g, with 27.3g per 30g serving. It is a vegan product.
Is Peak Supps Soy Protein Isolate 90% 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.
Pick your pack
1 size · any flavour · cost per 100g for each
Where to buy in the UK
5kg · 1 offer for this selection · sorted by cost per 100g
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