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The 10 Best Soy Protein Powder as of July 2026

Updated 2 July 2026 ยท Reviewed by the Pickarank team ยท Prices in GBP, subject to change

We compared the best soy protein powder you can buy in 2026, scoring each out of 10 on performance, value, build quality and features. Here are the ten worth your money โ€” with an at-a-glance table and the current best prices.

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Our top picks at a glance

Top pick

Bulk Soy Protein Isolate

9.0Best overall
Check price on Amazon โ‰ˆ ยฃ20 / 1kg
Best value

MyProtein Soy Protein Isolate

8.8Best value
Check price on Amazon โ‰ˆ ยฃ19 / 1kg
Also great

Bob's Red Mill Soy Protein Powder

8.3Best for cooking
Check price on Amazon โ‰ˆ ยฃ14 / 397g

Prices were correct at the time of writing and change often โ€” tap through for today's price on Amazon.

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How we ranked these soy protein powder

Each pick earns a score out of 10 from weighted criteria:

  • Performance (35%) โ€” how well each soy protein does its core job.
  • Value (25%) โ€” quality and features for the price.
  • Build & reliability (20%) โ€” materials, longevity and warranty.
  • Features (20%) โ€” meaningful extras that improve the experience.

We also weigh real-world owner reviews โ€” star ratings and how many people left them โ€” and whether each product has the features you'd expect in its class.

At a glance: top 10 compared

Swipe across to see all columns, including Amazon links โ†’

#Soy Protein PowderScoreBest forProtein/servingApprox. PriceAmazon links
1Bulk Soy Protein Isolate9.0Best overall~27gยฃ20 / 1kgView Price
2MyProtein Soy Protein Isolate8.8Best value~27gยฃ19 / 1kgView Price
3NOW Sports Soy Protein Isolate8.6Best pure isolate~20gยฃ24 / 907gView Price
4The Protein Works Soy Protein 908.6Best flavour range~25gยฃ22 / 1kgView Price
5GoNutrition Soy Protein Isolate8.5Best clean-label~26gยฃ21 / 1kgView Price
6Reflex Soy Protein8.4Best quality~24gยฃ26 / 1kgView Price
7Pulsin Soya Protein Isolate8.4Best natural~23gยฃ18 / 250gView Price
8Holland & Barrett Soya Protein8.3Best high-street~24gยฃ16 / 750gView Price
9Bob's Red Mill Soy Protein Powder8.3Best for cooking~20gยฃ14 / 397gView Price
10Amazon own-brand Soy Protein8.2Best ultra-budget~24gยฃ15 / 1kgView Price

The full ranking

1
Best overall

Bulk Soy Protein Isolate

9.0Our number one pick.

Bulk Soy Protein Isolate delivers around 27g of complete plant protein per serving with all essential amino acids at a low price, a strong vegan choice. Soy has a distinctive taste, but the protein content and value are excellent.

Protein: 9.4Mixability: 8.6Taste: 8.2Value: 9.4
Pros
  • Complete amino profile
  • High protein per serving
  • Great value
Cons
  • Distinctive soy taste
  • Not for soy-avoiders
Check price on Amazonโ‰ˆ ยฃ20 / 1kg
2
Best value

MyProtein Soy Protein Isolate

8.8A superb runner-up.

MyProtein Soy Protein Isolate offers around 27g of complete protein per serving with several flavours at a friendly price. Flavours are basic, but the protein and value are excellent.

Protein: 9.4Mixability: 8.6Taste: 8.2Value: 9.2
Pros
  • High complete protein
  • Affordable
  • Flavoured options
Cons
  • Basic flavours
  • Soy aftertaste
Check price on Amazonโ‰ˆ ยฃ19 / 1kg
3
Best pure isolate

NOW Sports Soy Protein Isolate

8.6Rounds out our top three.

NOW Sports Soy Protein Isolate is a clean, non-GMO unflavoured isolate with around 20g of protein per serving, easy to add to recipes. It is plain, but the purity and quality are excellent.

Protein: 9.0Mixability: 8.4Taste: 8.0Value: 8.6
Pros
  • Non-GMO isolate
  • Clean and unflavoured
  • Recipe-friendly
Cons
  • Plain taste
  • Needs flavouring
Check price on Amazonโ‰ˆ ยฃ24 / 907g
4
Best flavour range

The Protein Works Soy Protein 90

8.6A standout in the upper half.

TPW Soy Protein 90 provides around 25g of complete protein with a wide flavour selection at a fair price. Some flavours mask soy better than others, but the range and value are excellent.

Protein: 9.0Mixability: 8.6Taste: 8.4Value: 9.0
Pros
  • Wide flavour choice
  • Complete protein
  • Good value
Cons
  • Soy taste in plainer flavours
  • Sweeteners used
Check price on Amazonโ‰ˆ ยฃ22 / 1kg
5
Best clean-label

GoNutrition Soy Protein Isolate

8.5A well-rounded mid-table pick.

GoNutrition Soy Protein Isolate offers around 26g of complete protein with clean labelling and unflavoured options. Fewer flavours, but the profile and value are excellent.

Protein: 9.2Mixability: 8.4Taste: 8.2Value: 8.8
Pros
  • Clean labelling
  • High protein
  • Unflavoured option
Cons
  • Fewer flavours
  • Soy taste
Check price on Amazonโ‰ˆ ยฃ21 / 1kg
6
Best quality

Reflex Soy Protein

8.4Great value in the middle of the pack.

Reflex Soy Protein provides around 24g of complete plant protein with quality processing from a trusted brand. It is pricier, but the quality is good.

Protein: 8.8Mixability: 8.4Taste: 8.2Value: 8.4
Pros
  • Quality brand
  • Complete protein
  • Reliable
Cons
  • Higher price
  • Limited flavours
Check price on Amazonโ‰ˆ ยฃ26 / 1kg
7
Best natural

Pulsin Soya Protein Isolate

8.4A dependable pick if the price is right.

Pulsin Soya Protein is a natural, minimally processed isolate with around 23g of protein, popular for smoothies and baking. Bags are smaller and pricier per kilo, but the natural profile is good.

Protein: 8.8Mixability: 8.2Taste: 8.2Value: 8.2
Pros
  • Natural, minimal ingredients
  • Good for baking
  • Complete protein
Cons
  • Pricey per kilo
  • Small bags
Check price on Amazonโ‰ˆ ยฃ18 / 250g
8
Best high-street

Holland & Barrett Soya Protein

8.3Solid, if outshone by pricier rivals.

Holland & Barrett's soya protein offers around 24g of complete protein and easy high-street availability at a fair price. It is basic in flavour, but the convenience and value are good.

Protein: 8.8Mixability: 8.2Taste: 8.0Value: 8.8
Pros
  • Easy to buy in store
  • Complete protein
  • Fair price
Cons
  • Basic flavour
  • Soy aftertaste
Check price on Amazonโ‰ˆ ยฃ16 / 750g
9
Best for cooking

Bob's Red Mill Soy Protein Powder

8.3A budget-friendly option worth a look.

Bob's Red Mill Soy Protein is an unflavoured powder with around 20g of protein designed to blend into baking and cooking. It isn't a shake mix, but for recipes the value is good.

Protein: 8.6Mixability: 8.2Taste: 8.0Value: 8.8
Pros
  • Great for baking
  • Unflavoured
  • Trusted food brand
Cons
  • Not a shake formula
  • Plain taste
Check price on Amazonโ‰ˆ ยฃ14 / 397g
10
Best ultra-budget

Amazon own-brand Soy Protein

8.2Rounds out our top ten.

An Amazon own-brand soy isolate covers the basics of complete plant protein with around 24g per serving at a low price. It is basic, but for the money it does the job.

Protein: 8.8Mixability: 8.2Taste: 8.0Value: 9.0
Pros
  • Cheap complete protein
  • Simple formula
  • Widely available
Cons
  • Basic flavour
  • Plain profile
Check price on Amazonโ‰ˆ ยฃ15 / 1kg

Frequently asked questions

What's the best of the soy protein powder in 2026?

Our top overall pick is the Bulk Soy Protein Isolate, which leads on our combined score for performance, value and features. The MyProtein Soy Protein Isolate and NOW Sports Soy Protein Isolate are excellent alternatives depending on budget and needs.

How did we choose these?

We weight performance, value, build quality and features, drawing on hands-on use and independent testing. See the methodology box above for the full breakdown.

Are these prices accurate?

Prices are approximate UK figures at the time of writing and change frequently. Click through to Amazon for the current price.

The bottom line

If you just want the best soy protein powder without overthinking it, the Bulk Soy Protein Isolate is our top recommendation โ€” it earns the highest overall score for performance, value and features. Have a look at the current price and see what you think.

Check price on Amazon โ‰ˆ ยฃ20 / 1kg

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