Tastes so good.
Bulletproof Whey (ISO BLEND)
protein blend of whey isolate and concentrate.
Our protein is trusted by professional athletes across many sports , and is highly regarded as one of the best combinations of both taste and quality.
Whey Concentrate, Whey Isolate, and Hydrolysed Whey Protein.
This powerful formula delivers fast, medium, and slow-digesting protein to fuel muscle growth, boost recovery, and keep you anabolic all day long.
KEY BENEFITS
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24g of high-quality protein per scoop
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Fast absorption for muscle repair & recovery
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Smooth, delicious taste — no clumps or chalky texture
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Packed with essential BCAAs for performance & endurance
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Perfect for shakes, oats, or cream of rice
HOW TO USE
Mix 1 scoops (30g) with 250–400ml of water or milk.
Shake well for a smooth, great-tasting shake — or mix into your oats or cream of rice for a high-protein meal.
Ideal for pre- or post-workout use.
WHY BULLETPROOF STANDS OUT
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Made with premium-grade whey protein sourced via advanced ultra-filtration
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Includes Hydrolysed Whey for rapid absorption and digestion
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Supports muscle recovery, lean growth, and sustained energy
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Comes in unreal flavours that hit every time
Gas Mark 10 – Bulletproof Whey ISO Blend
Built for performance. Crafted for flavour.
Believe in the man. Believe in the brand.
FREE SHIPPING ON ALL ORDERS OVER £100
UK Shipping
Standard UK delivery takes 2–5 business days once dispatched.
All orders are dispatched from our UK warehouse within 1–3 business days.
During peak periods, dispatch may take up to 5–10 business days.
How are orders shipped?
Orders are shipped from the UK via DPD, Royal Mail, or Evri, depending on the size and weight of the package.
Do you ship internationally?
No — we currently ship within the UK only.
Will I receive tracking information?
Yes. Once your order has shipped, you’ll receive an email containing your tracking details.
If you haven’t received tracking information within 5 business days, please contact us.
My tracking shows “no information available”
Some carriers can take 2–5 business days to update tracking information.
If your order was placed over 5 business days ago and tracking has not updated, please get in touch.
Will my order arrive in one package?
For logistical reasons, items from the same order may occasionally be shipped in separate packages.
Need help?
If you have any other questions, please contact us and we’ll be happy to help.
Bulletproof Whey (ISO BLEND)
Sale price£67.50
Choose options
Bulletproof Whey (ISO BLEND)
Sale price£67.50
KEY BENEFITS
TRIED. TESTED. TRUSTED.
Real feedback from people who put in the work
Customer Reviews
Overall rating: 4.9 / 5 from 159 reviews.
Very good products that taste delicious
Great tasting whey!! No lumpy or botty when mixed and the creatine is making a real difference in my strength and endurance
One of the best tasting protein powders great quality!
Best protein ever
I ordered chocolate brownie flavour and I’ve had all others but this one is top of that list. All have been bang on and used through prep and now off season. Never had an issue with any product at Gasmark and the flavours are the best I’ve had. I’ve cooked, made whey paste, pancakes you name it and it works with everything. 10/10 service and delivery is always fast.
Vanilla icecream Didnt think the banana could be beaten, but this tops it. Literally tastes like milkybar. Best tasting protein on the market without doubt 🔥
Tastes amazing especially when combined with other gas mark 10 products. 200ml milk 2 scoops COR and 1 scoop of ISO whey with 1 banana game changer. Perfect for pre and post workout meals. I usually take it to work with me keeps fueled for the day ahead. 10/ outta gas mark 10.
Number 1 go to for me
Adding the chocolate one to oats and it's amazing 🤩
Been in the supplement game for the past 17 or so years, many protein brands ive tried over the years ive lost count. Finally got round to trying gas mark 10 whey. The best banana protein ive ever tried hands down by a mile, ill be sticking to this brand now no doubt cant wait to try the other flavours😮💨💥
Unbelievable flavour apple pie bang on ....goes well with my meals...fast delivery...very good quality would highly recommend
Best tasting protein I’ve had. Will also buy the lemon cheesecake protein too. Apple Pie flavour is banging 🫶🏻🫶🏻
Best protein powder around 👌🏽🔥
Taste is amazing
Protein is bang on! Will work my way through the flavours
10/10 this flavor is proper
Tastes Great. Blends well and makes Readybrek taste great
Love the taste, I have my protein mixed with cream of rice. Also just have it mixed with water made into paste rather than a shake, it’s like a little dessert.
Love the taste. Quality product
Another great flavour
Ordered online and the product came the next day. Great service. I received notifications of the delivery and times. The packaging is top notch. The flavour chocolate hazelnut is silky smooth. Mixes well tastes quality. Not too strong and sickly sweet as many other protein powders can be. Just a quality nutty caramel bar taste. Packaging top notch. No digestive issues, no bloating. Probably the best protein I’ve had from over 25 years of trying many.
Cant fault it and taste is amazing . Thankyou 😊
Great product great taste no lumps or anything really nice flavour too definitely 5 ⭐ for sure definitely recommend to family and friends
Chocolate hazelnut best flavour on the market...mixes perfect..no clumps or lumps at the bottom of your shaker
Unreal flavour and texture when made with water and oats!
5 star for this one proper tasty
Best tasting and easiest mixing highest quality protein powder on the market GM10 All day 👌
Tastes awesome!!!!!
Faultless as per usual, service and product first class
Really good. Digests easily, tastes amazing!
Mixes well, tastes great. Highly recommended
My favourite flavour, literally like a desert. Especially when you’re using it as protein drip for you're oats!!
Nothing else to say other that perfection as always!
Gorgeous protein delivery quick too loving it so far
Amazing flavour
Lemon cheesecake. Tastes absolutely amazing
Best protein i have ever had 👌
taste is unreal product is unreal best on the market
Amazing
BUILT BY ROB TAYLOR
Believe in the man. Believe in the brand.
A man who’s lived every rep, every grind, every setback, and every win.
Gas Mark 10 isn’t a brand built in a boardroom — it’s forged through years of discipline, sweat, and relentless drive. Every product reflects the standards Rob trains by.
No shortcuts. No fillers. No games.
SHOP ROB'S FORMULATIONSCUSTOMER FAVOURITES
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PRODUCT INFORMATION
Frequently Asked Questions
Designed for people who train regularly and want reliable support around performance and recovery.
Usage instructions are listed on the label. Follow the recommended serving size.
Yes. GM10 products are designed to work together. Suggested stacks are shown above.
Yes, when used as directed.
All products are produced to strict quality standards using carefully selected ingredients.