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Cheapest overallPure Source Nutrition
PSN Soy Protein 5kg Powder77 bought this week
77bought this week90% protein · 27g / 25g serving
Bag · 5kg
£36.99
£0.21 / 25g protein
Vegan
Best Vegan Protein Powder UK
Compare protein prices from MyProtein, Bulk, Optimum Nutrition and 85+ other UK retailers. Every product ranked by cost per 25g of protein. Free, updated weekly. Whether you are buying whey concentrate, whey isolate, vegan protein, casein, or a mass gainer, every bag is normalised to the same metric so you can compare across brands, sizes, and protein percentages without doing the maths yourself. No sponsored rows, no affiliate-biased rankings. The cheapest option sits at the top because it is the cheapest, not because a brand paid for placement.
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Hand-picked by our nutrition team every Monday, 07:00. Scored on £/25g protein, clean-label, and weekly velocity.
Showing 72 vegan products
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About Vegan Protein
Plant-based protein powders have improved dramatically in recent years, both in taste and essential amino acids completeness. The best vegan protein supplement blends combine multiple quality plant sources — typically pea, rice, hemp or soy — to deliver a complete amino acid profile comparable to whey, helping you build muscle and support your protein intake without dairy.
We track vegan protein products across UK retailers, sorted by price per 100g. Whether you are vegan, lactose intolerant, or simply prefer a plant-based protein supplement, you can compare every option side by side without visiting multiple sites.
Key things to look for: aim for a product with at least 20g protein per serving from multiple quality plant sources. Blends of pea and rice protein tend to offer the most complete essential amino acids profile for muscle mass support. If you are training regularly, a good vegan protein supplement can fully support your daily protein intake and help you build muscle just as effectively as whey. For whey-based alternatives, see whey concentrate.
Methodology
How we rank every bag.
Independent, transparent, and updated weekly. Here's what goes into each score.
01
Cost normalised to £/25g
Every bag divided by its true protein weight, so you see the real cost of a scoop across any size or brand.
02
Protein quality, not just %
Protein %, leucine and digestibility feed the Performance score. A 90% isolate and a 90% vegan blend are not the same.
03
Clean-label audit
Ingredient count, artificial sweeteners, added sugars, third-party certifications. 0 to 100 score.
04
Social and review signals
Weekly purchase volume and weighted review scores surface what people actually re-buy, not just what ranks on search.
Questions, answered.
Soy protein isolate and pea protein isolate typically offer the highest protein content among vegan options, often 80-85g per 100g. These quality plant sources provide the essential amino acids needed to build muscle effectively. Use the protein/100g column above to compare.