Soya Protein Isolate
by Bulk
Plant-powered performance: a dairy-free protein source that delivers on taste, nutrition, and sustainability.
- Up to 25g 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
Flavour pictures illustrate the taste, not the powder's colour or ingredients.
Best price
In stock£66.99
£1.34 / 100g
Secure retailer checkout
We may earn a commission at no extra cost to you. Affiliate disclosure
Transparent protein profile
What's inside
Values per 100g, with the amount in one 30g serving
84g protein
25.2g per 30g serving with minimal filler
3g carbohydrates
Extremely low carbs - suitable for keto and low-carb diets
1g fat
0.2g per 30g serving - very lean
357 kcal
107 kcal per 30g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (30g) |
|---|---|---|
| Protein | 84g | 25.2g |
| Calories | 357 kcal | 107 kcal |
| Carbohydrates | 2.6g | 0.8g |
| Fat | 0.8g | 0.2g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£1.30/100g (£12.99 for 1kg on 4 Oct 2026)
5kg · all flavours · price per pack
- Bulklatest £66.99 (one check so far)
Quick answers
Is this right for you?
Who is it for?
Bulk Soya Protein Isolate 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 84g of protein per 100g (around 25g per 30g serving), Bulk Soya Protein Isolate sits at the higher end for a vegan product.
What else do you need to know?
Bulk Soya Protein Isolate is a vegan protein powder made by Bulk. It comes in 1kg, 2.5kg, 5kg sizes, and WheyWise tracks prices across 2 UK retailers so you can always find the best deal. 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 Bulk Soya Protein Isolate in the UK?
We refresh Bulk Soya Protein Isolate 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 Soya Protein Isolate contain per 100g?
Soya Protein Isolate contains 84g of protein per 100g, with 25.2g per 30g serving. It is a vegan product.
Is Bulk Soya Protein Isolate currently in stock?
At the last check, 13 out of 14 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.
Pick your pack
3 sizes · any flavour · cost per 100g for each
The 5kg works out at £1.34 per 100g. The 1kg costs £1.50. Same powder, 1.1x the price per gram.
Where to buy in the UK
Any flavour · 5kg · 1 offer for this selection · sorted by cost per 100g
Similar products you might prefer
Other vegan powders from different brands, cheapest per 100g first.
Pure Source Nutrition
PSN Soy Protein Powder
XCelerate Nutrition
Pea Protein Isolate Powder
Peak Supps
Soy Protein Isolate 90%