Warrior Serious Protein powder tub, Chocolate Milkshake flavour, 500g – black tub with brown label showing 24g Protein, No Added Sugar and Low Fat badges, with a chocolate milkshake splash graphic.

Serious Protein

Chocolate Milkshake
£12.50 £17.99
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Warrior Serious Protein, Chocolate Milkshake: pack shot
Warrior Serious Protein - 500g
SKU B358-C-500

Serious Protein Chocolate Milkshake

  • 24g soy protein and 107 calories per serving
  • Chocolate, Strawberry and Vanilla Milkshake flavours
  • 16 servings per 500g tub
24g Protein
107 Kcal
16 Servings
500g Tub
3 Flavours
FlavourChocolate Milkshake
  • 60-day money-back guarantee
  • Made in the UK
  • 20 years in business
  • 1m+ happy customers
Description

Why we made it

Whey prices have risen massively over the past couple of years. Every brand you know has quietly put prices up or shrunk the tub. Rather than sell whey at a loss, or pass that cost on to you, we retired it.

In its place: Serious Protein. Soy protein isolate, skimmed milk, casein and glutamine peptides, blended in our own factory in Manchester — 24g of protein in every 30g scoop, the same as the premium tubs, for 78p a shake in the 500g.

That's it. That's the product. No influencer, no hype, no proprietary matrix. Real fuel for hard work.

Protein contributes to the growth and maintenance of muscle mass.

*Contains naturally occurring sugars (lactose from the milk powder).

Is it as good as whey?

Protein is protein. What matters is whether it has the amino acids your muscles need, and enough of them. Soy protein isolate scores 1.0 on the PDCAAS scale, the same top mark as whey and casein, and this blend adds milk protein on top of it.

In the trials that put soy against whey over 6-12 weeks of training, people gained the same muscle and strength on either: a 2018 meta-analysis of nine studies found no difference, and a 2020 randomised trial matched for leucine found the same.1,2

Will soy mess with my testosterone? No. The largest analysis on the subject pooled 41 clinical studies and measured testosterone in 1,753 men: no effect of soy protein or isoflavones on total testosterone, free testosterone or oestrogen, at any dose or duration.3 If someone tells you otherwise, ask them for their study.

1. Messina et al., Int J Sport Nutr Exerc Metab 2018. 2. Lynch et al., Int J Environ Res Public Health 2020. 3. Reed et al., Reprod Toxicol 2021.

What it isn't

It isn't whey. It isn't vegan (there's milk in it). It isn't gluten-free (the glutamine peptides come from wheat protein). It isn't a meal replacement. And it isn't for kids: it's a food made for adults, and anyone under 18, pregnant or nursing should check with a qualified health professional first.

Key features

  • Protein 24g protein from soy protein isolate, skimmed milk powder, casein and glutamine peptides

  • Energy 107-110 kcal, 0.3g fat, 2.1-2.7g carbs

  • Sugar No added sugar*, no thickeners, no maltodextrin

  • Allergens Suitable for vegetarians. Contains soy, milk and gluten (wheat)

How and when to take

250-300ml of cold milk in the shaker first, then one level scoop (30g). Shake hard for 30 seconds, let it settle, shake again. Milk is how to get the best taste out of it — it's what makes it taste like a proper milkshake, not a chalky shake.

After training, at breakfast, the mid-afternoon gap, the drive home. Any time the day needs 24g of protein. The pack says any, pre, intra, post, and it means it.

Ingredients

Serving size: 1 level scoop (30g). Servings per container: 16.

Chocolate Milkshake

Typical values, per 100g and per 30g serving

  • Energy — 1509 kJ / 355 kcal — 453 kJ / 107 kcal
  • Fat — 0.9g — 0.3g
  • of which saturates — 0.2g — 0.1g
  • Carbohydrate — 6.9g — 2.1g
  • of which sugars — 4.7g — 1.4g
  • Fibre — 0.3g — 0.1g
  • Protein — 79.9g — 24g
  • Salt — 0.1g — 0.03g

Ingredients: Soy Protein Isolate, Skimmed Milk Powder, Glutamine Peptides (Wheat), Casein (Milk), Flavouring, Cocoa Powder, Anti-caking Agent (Silicon Dioxide), Sweetener (Sucralose).

Strawberry Milkshake

Typical values, per 100g and per 30g serving

  • Energy — 1550 kJ / 365 kcal — 465 kJ / 110 kcal
  • Fat — 0.9g — 0.3g
  • of which saturates — 0.2g — 0.1g
  • Carbohydrate — 9.1g — 2.7g
  • of which sugars — 5.4g — 1.6g
  • Fibre — 0.3g — 0.1g
  • Protein — 79.9g — 24g
  • Salt — 0.1g — 0.04g

Ingredients: Soy Protein Isolate, Skimmed Milk Powder, Glutamine Peptides (Wheat), Casein (Milk), Flavouring, Colour (Beetroot), Anti-caking Agent (Silicon Dioxide), Sweetener (Sucralose).

Vanilla Milkshake

Typical values, per 100g and per 30g serving

  • Energy — 1552 kJ / 366 kcal — 466 kJ / 110 kcal
  • Fat — 0.9g — 0.3g
  • of which saturates — 0.2g — 0.1g
  • Carbohydrate — 8.9g — 2.7g
  • of which sugars — 5.9g — 1.8g
  • Fibre — 0.3g — 0.1g
  • Protein — 79.9g — 24g
  • Salt — 0.1g — 0.04g

Ingredients: Soy Protein Isolate, Skimmed Milk Powder, Glutamine Peptides (Wheat), Casein (Milk), Flavouring, Anti-caking Agent (Silicon Dioxide), Sweetener (Sucralose).

Allergen information: Contains soy, milk and gluten (wheat). Manufactured on equipment that processes products containing milk, soy, egg, gluten, nuts and peanuts.

Suitable for vegetarians. Not suitable for vegans or coeliacs.

A varied and balanced diet and a healthy lifestyle are important. Check with a qualified health professional before using this product if you are under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical condition(s) and/or are taking any prescription or over the counter medication(s).

Store in a cool, dry place, out of direct sunlight and out of reach of children. Best before: see lid.

KBF Enterprises Ltd, Unit 1 Guinness Road Trading Estate, Guinness Road, Manchester, M17 1SB

Shipping and delivery
  • Standard delivery £3.99
  • Next day delivery £5.99
  • Free delivery on orders over £40
  • Subscribers get free shipping on every order
Returns

If something is not right, contact us and we will put it right. Unopened items can be returned within 30 days of delivery for a refund.

For food safety reasons we cannot resell opened supplements, so opened tubs are not returnable unless the product is faulty or was sent in error. This does not affect your statutory rights.

Subscription terms
  • Save 10% on every subscription order
  • Free shipping on every subscription order
  • Pause, skip, change your delivery date or cancel at any time from your account
  • No minimum term and no cancellation fee
FAQs

Is it whey?

No. Serious Protein is a blend of soy protein isolate, skimmed milk powder, casein and glutamine peptides. It gives you the same 24g of protein per 30g scoop as a whey concentrate, at a fraction of the price whey costs this year.

Why soy?

Because it's a complete protein (all nine essential amino acids, PDCAAS score 1.0, the same top mark as whey and casein) at a price that lets us sell a 24g-protein shake for 78p. We add skimmed milk and casein for taste, texture and slower-digesting milk protein. Whey would have cost you three times as much this year.

Will soy affect my testosterone?

No. The largest analysis on the subject pooled 41 clinical studies and measured testosterone in 1,753 men: no effect of soy protein or isoflavones on total testosterone, free testosterone or oestrogen, at any dose or duration (Reed et al., 2021). It confirmed a 2010 meta-analysis that found the same. If someone tells you otherwise, ask them for their study.

Does it build muscle like whey?

Protein contributes to the growth and maintenance of muscle mass, whatever the source, as long as it's complete and you get enough of it. In the trials that put soy against whey over 6-12 weeks of training, people gained the same muscle and strength on either (Messina et al., 2018, meta-analysis of 9 studies; Lynch et al., 2020, randomised trial).

How much protein do I need a day?

The sports nutrition consensus is 1.4-2.0g per kilo of bodyweight a day if you train, spread across three or four feeds of 20-40g (ISSN position stand, 2017). For an 85kg man that's roughly 120-170g a day. One scoop is 24g of it.

When should I take it?

Whenever you're short of protein. After training is the obvious one, but breakfast, the mid-afternoon gap and the drive home all count. The pack says any time, pre, intra or post, and it means it.

What's actually in it?

Soy protein isolate, skimmed milk powder, glutamine peptides (from hydrolysed wheat protein), casein, flavouring, cocoa (chocolate) or beetroot colour (strawberry), an anti-caking agent and sucralose. No thickeners, no maltodextrin, no added sugar (contains naturally occurring sugars). That's the whole list.

Is it gluten-free, vegan or halal?

No, no, and not certified. It contains wheat (the glutamine peptides are made from wheat protein), so it isn't suitable for coeliacs. It contains milk, so it isn't vegan, though it is suitable for vegetarians. It doesn't carry a halal mark.

Does it contain lactose?

A little, from the skimmed milk powder. The 1.4-1.8g of sugars per serving is essentially all naturally occurring lactose. If you're lactose intolerant, this isn't the one for you.

What's the sweetener?

Sucralose, a small amount. No sugar is added; the sugars on the label are the lactose from the milk powder.

Is it a meal replacement?

No. It's a protein shake: 107-110 calories, 24g protein, 0.3g fat. Add oats, fruit or milk if you want a meal.

Can my kids have it?

It's a food, not a medicine, but it's designed for adults. For anyone under 18, and for pregnant or nursing mothers, the label says check with a qualified health professional first, and we'd say the same.

Does protein powder expire?

Best before is printed on the lid: three years from production. Keep the lid on, in a cool, dry cupboard.

What should I mix it with?

Milk. 250-300ml of cold milk is what turns this into an actual milkshake, not just a protein shake — it's how the flavours (Chocolate, Strawberry, Vanilla) taste like the real thing. Liquid in first, then the scoop, shake hard for 30 seconds, let it settle, shake again.

Why is it so much cheaper than the big tubs?

Three reasons. It isn't whey, and whey has more than doubled in price in a year. We make it ourselves in Manchester, so nobody else's margin is in the tub. And we don't pay influencers to tell you it's good.

Where is it made?

In our own BRCGS-certified factory in Trafford Park, Manchester. We've made sports nutrition there since 2008.

How does the subscription work?

Pick a flavour, choose how often (every 2 weeks suits most people at a scoop a day), and we'll send it. Change flavour, skip a delivery or cancel any time from your account.

Why does it say no added sugar when there are sugars on the label?

Because we don't add any. The 1.4-1.8g of sugars per serving occur naturally in the skimmed milk powder (it's lactose). The law requires us to say 'contains naturally occurring sugars' next to the claim, which is what the asterisk on the tub is for.

Straight Answers

More questions?

Is it whey?

No. Serious Protein is a blend of soy protein isolate, skimmed milk powder, casein and glutamine peptides. It gives you the same 24g of protein per 30g scoop as a whey concentrate, at a fraction of the price whey costs this year.

Why soy?

Because it's a complete protein (all nine essential amino acids, PDCAAS score 1.0, the same top mark as whey and casein) at a price that lets us sell a 24g-protein shake for 78p. We add skimmed milk and casein for taste, texture and slower-digesting milk protein. Whey would have cost you three times as much this year.

Will soy affect my testosterone?

No. The largest analysis on the subject pooled 41 clinical studies and measured testosterone in 1,753 men: no effect of soy protein or isoflavones on total testosterone, free testosterone or oestrogen, at any dose or duration (Reed et al., 2021). It confirmed a 2010 meta-analysis that found the same. If someone tells you otherwise, ask them for their study.

Does it build muscle like whey?

Protein contributes to the growth and maintenance of muscle mass, whatever the source, as long as it's complete and you get enough of it. In the trials that put soy against whey over 6-12 weeks of training, people gained the same muscle and strength on either (Messina et al., 2018, meta-analysis of 9 studies; Lynch et al., 2020, randomised trial).

How much protein do I need a day?

The sports nutrition consensus is 1.4-2.0g per kilo of bodyweight a day if you train, spread across three or four feeds of 20-40g (ISSN position stand, 2017). For an 85kg man that's roughly 120-170g a day. One scoop is 24g of it.

When should I take it?

Whenever you're short of protein. After training is the obvious one, but breakfast, the mid-afternoon gap and the drive home all count. The pack says any time, pre, intra or post, and it means it.

What's actually in it?

Soy protein isolate, skimmed milk powder, glutamine peptides (from hydrolysed wheat protein), casein, flavouring, cocoa (chocolate) or beetroot colour (strawberry), an anti-caking agent and sucralose. No thickeners, no maltodextrin, no added sugar (contains naturally occurring sugars). That's the whole list.

Is it gluten-free, vegan or halal?

No, no, and not certified. It contains wheat (the glutamine peptides are made from wheat protein), so it isn't suitable for coeliacs. It contains milk, so it isn't vegan, though it is suitable for vegetarians. It doesn't carry a halal mark.

Does it contain lactose?

A little, from the skimmed milk powder. The 1.4-1.8g of sugars per serving is essentially all naturally occurring lactose. If you're lactose intolerant, this isn't the one for you.

What's the sweetener?

Sucralose, a small amount. No sugar is added; the sugars on the label are the lactose from the milk powder.

Is it a meal replacement?

No. It's a protein shake: 107-110 calories, 24g protein, 0.3g fat. Add oats, fruit or milk if you want a meal.

Can my kids have it?

It's a food, not a medicine, but it's designed for adults. For anyone under 18, and for pregnant or nursing mothers, the label says check with a qualified health professional first, and we'd say the same.

Does protein powder expire?

Best before is printed on the lid: three years from production. Keep the lid on, in a cool, dry cupboard.

What should I mix it with?

Milk. 250-300ml of cold milk is what turns this into an actual milkshake, not just a protein shake — it's how the flavours (Chocolate, Strawberry, Vanilla) taste like the real thing. Liquid in first, then the scoop, shake hard for 30 seconds, let it settle, shake again.

Why is it so much cheaper than the big tubs?

Three reasons. It isn't whey, and whey has more than doubled in price in a year. We make it ourselves in Manchester, so nobody else's margin is in the tub. And we don't pay influencers to tell you it's good.

Where is it made?

In our own BRCGS-certified factory in Trafford Park, Manchester. We've made sports nutrition there since 2008.

How does the subscription work?

Pick a flavour, choose how often (every 2 weeks suits most people at a scoop a day), and we'll send it. Change flavour, skip a delivery or cancel any time from your account.

Why does it say no added sugar when there are sugars on the label?

Because we don't add any. The 1.4-1.8g of sugars per serving occur naturally in the skimmed milk powder (it's lactose). The law requires us to say 'contains naturally occurring sugars' next to the claim, which is what the asterisk on the tub is for.

18 verified reviews · 2.9/5

Real reviews. No bull.

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Customer Reviews

Overall rating: 2.9 / 5 from 18 reviews.

Customer photo review of Warrior Serious Protein - 500g

Always reliable, great value and nutritional profile I’ve been using Warrior_products for quite a while now, and they’ve consistently impressed me. This Serious_ Protein_ Powder_ (Vanilla_Milkshake) continues that trend, smooth taste, mixes easily, and delivers a strong nutritional profile with 24_g of protein per serving.It’s great value for money, especially given the quality and flavour. The powder dissolves cleanly with water or milk, leaving no lumps, and supports recovery perfectly after workouts. (I prefer in water)A dependable, well-balanced protein shake from a brand that never disappoints. Five_stars for consistency and quality.The tub is also a plus point, better than a bag some protein comes in, with a screw top lid you know its shut! Flavour: Vanilla

Super S. 5/5 Verified

Warrior Serious Protein - 500g

Customer photo review of Warrior Serious Protein - 500g

A good protein source, but takes a good blending to smooth out The quality of this protein powder is good and you get a solid 24 g of protein per serving, with low-fat and no added sugar it’s an excellent protein source when in a calorie deficit.The vanilla milkshake flavour is pleasant without being overly sweet, I could easily have this every day.The downside to it is mine didn’t mix too well, I found lots of clumpy bits which was offputting, it took 3 blends in my ninja blender to get it completely smoothThat said with 16 servings per 500 g I think it offers good value for money overall. Flavour: Vanilla

Ryry 4/5 Verified

Warrior Serious Protein - 500g

Customer photo review of Warrior Serious Protein - 500g

Serious Protein Powder 500g (Vanilla Milkshake) A 500g blended protein powder using soy isolate, skimmed milk powder, casein and glutamine peptides to deliver 24g of protein per 30g scoop. It’s positioned as a simple, everyday high-protein shake with no added sugar and low fat, designed for post-workout use or general daily protein intake. The vanilla milkshake flavour aims for a smooth, creamy profile whether mixed with milk or water. With 16 servings per pack and UK manufacturing, it’s a budget-friendly option for users who want a straightforward protein blend rather than a premium isolate.Pros:* 24g protein per scoop for daily muscle support* Soy + casein blend offers slower digestion than whey* No added sugar and low fat* Creamy vanilla flavour mixes well with milk or water* Made in the UK with vegetarian-friendly ingredients* Affordable 500g packCons:* Contains soy, milk and gluten — not suitable for allergen-sensitive users* Blend is not as high-purity as whey isolate* Only 16 servings — small pack for regular gym users* Casein + soy texture can be slightly thicker than whey* Vanilla flavour only in this listingFinal Thoughts:A solid budget protein blend suited to users who want a simple, creamy shake with a decent 24g protein hit per serving. The soy-casein mix offers slower digestion, making it good for satiety or evening shakes. Best for everyday gym-goers who want value over premium isolates and don’t have soy/milk/gluten restrictions. Flavour: Vanilla

Nb 5/5 Verified

Warrior Serious Protein - 500g

Cant drink it as it is not nice taste another waste of protein drink I said that before I bought it oh well

Neil L. 1/5 Verified

Warrior Serious Protein - 500g

The fact I paid extra money to have next day delivery and it took three days is unbelievable. Especially when I needed it that next day.

Megan M. 1/5 Verified

Warrior Serious Protein - 500g

found it best with milk, mixes well & doesn't taste too bad for chocolate protein

David M. 4/5 Verified

Warrior Serious Protein - 500g

Flavour and consistency not nice. It doesn’t mix very well. Very lumpy. Not for me. Very disappointing.

J G. 1/5 Verified

Warrior Serious Protein - 500g

Tastes nice, much like your other protein but unfortunately it doesn't mix as well leaving lots of clumps. Not sure I could continue drinking it like that.

Nicholas T. 3/5 Verified

Warrior Serious Protein - 500g

Really tasty vanilla protein powder I already really like the other Warrior protein powders I have tried, so I was looking forward to trying the Vanilla Milkshake flavour. It definitely didn't disappoint. The flavour is delicious, with a lovely creamy vanilla taste that doesn't have that overly artificial protein shake flavour.It mixes really well too. I usually have mine as a shake, but I have also been using it to make protein vanilla ice cream in my Ninja Creami. The ice cream turned out really tasty and had a lovely vanilla flavour. With 24g of protein per scoop, it is an easy way for me to add more protein to my day. I also like that it is low fat with no added sugar.I really like this flavour and will buy it again. It tastes good, mixes easily and makes getting my daily protein in a bit more enjoyable. Flavour: Vanilla

Customer 5/5 Verified

Warrior Serious Protein - 500g

My go to for all protein! Cheap protein & tastes great. Highly recommend, my go to for all protein!! Flavour: Vanilla

Coral M. 5/5 Verified

Warrior Serious Protein - 500g