Name: Protein Works Soy Protein 90 (Isolate)
Brand: Protein Works
Availability: InStock

The bottom line

Protein Works Soy Protein 90 (Isolate) is a soy protein isolate that covers the usual bases in this category, offered at a strong price versus others in this category. A reasonable pick in this category if the flavour you want is in stock.

Price history

The price has stayed at £47.99 since 16 Jul 2026.

Nutrition

Values for Chocolate Silk.	Per 30g	Per 100g
Energy	108kcal	358kcal
Fat	0.4g	1.2g
of which saturates	0.1g	0.5g
Carbohydrate	1.5g	4.9g
of which sugars	0g	0.1g
Fibre	0.8g	2.7g
Protein	25g	84g
Salt	0.7g	2.4g

From theproteinworks.com, read 17 Oct 2026. See what we read.

Ingredients

Soy Protein Isolate, Fat-Reduced Cocoa Powder, Flavouring, Sweetener (Sucralose).

Allergens: Made in a factory that handles milk, egg, cereals with gluten, peanuts, nuts & soya.

Every size compared

Chocolate Silk, cheapest retailer for each size

Size	Servings	Price	Per serving	Per kg
500g	16	£9.99	£0.62	£19.98
1kg	33	£13.99	£0.42	£13.99
2kg	66	£25.99	£0.39	£13.00
4kg	133	£47.99	£0.36	£12.00

The 4kg works out 42% cheaper per serving than the 500g.