AllMax Nutrition


Whey Protein Isolate Powder For Building Muscle*
Blend Of Muscle Building And Recovery Compounds For Improved Results*
9.1 out of 10  (541 Reviews)
3 Sizes
1 Lb.
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2 Flavors
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Price: $22.99 ($1.64 / Serving)
In Stock
Flavor Rating: 8.7

Product Overview

Amazing New Taste
90 Percent Protein

All new and improved ISOFLEX® is the ultimate in taste and the ultimate in quality. Not only does ISOFLEX have a brand new look and great taste, using cutting edge technology, it's a pure 100% whey protein isolate. ISOFLEX is significantly lower in lactose, fat, sugar and carbs, compared to regular WPIs too! If you're looking for the highest quality, most premium and fastest absorbing protein, then look no further than ISOFLEX; a Truly Superior Whey Protein Isolate.







HRI Filtration Technology
15% Higher than typical Whey Protein Isolates. Highly valued in baby formla as it is the primary Protein Fraction in Human milk.

ISOFLEX uses a unique protein extraction technology called Hybrid-Ratio Ion-Filtration (HRI). A hybrid of two isolate purification technologies incorporated at a specific ratio to produce a truly superior ultra-pure Whey Protein Isolate. Cutting-Edge HRI Technology allows ISOFLEX to retain an exceptionally high protein yield while maintaining enhanced bioactive whey fractions.

ISOFLEX contains absolutely NO Whey Concentrate. Concentrates have higher levels of fat and sugars with a lower percentage of protein and lower bioavailability than Isolates. While other brands use Concentrates, ISOFLEX users know that Isolates have a superior protein percentage and won't settle for non-Isolate blends.

That's right, 100% Whey Protein Isolate at your fingertips, giving you a whopping 90% protein content! With only Native and Intact, Non-Denatured Whey Protein Fractions. 27 g of Pure Protein that has been laboratory tested, certified and approved.

Truly Pure. Truly Superior.

If you're a bodybuilder you know that high levels of protein consumption are critical to success. Most aim for 1.5 to 3 grams of protein per pound of bodyweight daily depending on the intensity and frequency of their training and space their consumption throughout the day. We all know how important it is to get our protein in during that precious anabolic window.

Because of ISOFLEX's high quality pureness you get some of the fastest protein absorption out there with the ultimate amount of amino acids to balance it out. And don't forget ZERO fat and ZERO sugar! ISOFLEX mixes well in a shaker cup but can be combined with other ingredients in a blender as a smoothie too. Take ISOFLEX anytime and anywhere you need it.

Scoop Lock

ISOFLEX now features SCOOP-LOCK™ Technology. Together we can put an end to the scourge of Scoop Loss.

Join The Movement. Do Your Part. #StopScoopLoss

Gone are the days of digging through your protein to get your scoop. SCOOP-LOCK is ergonomically designed to lock your scoop into place the first time and every time! And it’s right there at the top of your ISOFLEX when you open it! Scoop-Lock is available on all ISOFLEX, ALLWHEY Gold, ALLWHEY Classic and HEXAPRO products and it’s only from ALLMAX. Look for the rugged new Ergo-Lid™ on ALLMAX products with Scoop-Lock™ inside!


Don’t give up taste to get the power of Whey Protein Isolate. The first thing that really sets ISOFLEX apart from any other protein powder on the market is its taste. It tastes amazing! And with eight delicious flavors to choose from, there’s sure to be one that satisfies your distinct taste buds.

Chocolate Mint
Chocolate Peanut Butter
Orange Dreamsicle
Pineapple Coconut
Cookies and Cream
Caramel Macchiato

ALLWHEY Classic has been produced in a cGMP registered facility, it’s tested and certified Gluten-Free and certified Kosher protein. Additionally ALLWHEY Classic is certified as an approved Informed-Choice tested for banned substances protein as indicated by the seal of approval on each and every ALLMAX ALLWHEY Classic.

Unsurpassed Allmax Quality Guarantee

Every ingredient added and every lot produced is laboratory-tested for purity and potency to ensure consistent product quality and integrity every time, guaranteed. ALLWHEY Classic goes through the exclusive ALLMAX 5-Stage Quality Testing protocol. In fact, we’re so confident in the quality of our product that it’s completely guaranteed.

Test our product; we guarantee it passes every time or we pay for your testing and refund your purchase. You won’t find anyone else willing to stand behind their product with this guarantee.

Like ISOFLEX? We recommend giving HEXAPRO a try!

HEXAPRO has 6 highly-bioavailable proteins for extended amino acid release. This unique blend of proteins means that protein delivery takes place across a much wider time frame than whey protein alone. HEXAPRO has a delicious Milkshake-like taste that tastes so good, it’s the perfect nighttime snack that actually helps you stay on your diet! All this, and HEXAPRO dwarfs the competition with their 3lb size! It has 50% more of our delicious protein goodness in comparison to the competitors 2lb product, getting you the most bang for your buck!

Ratings & Reviews

Overall Rating
541 Ratings
Verified Buyer Rating
124 Ratings
Average Flavor Rating
10 Flavors
Top Rated Flavor
Caramel Macchiato
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Verified Buyer
  • 9 Strawberry
  • 6 Chocolate Peanut Butter
  • 7 Pineapple Coconut
  • 6 Orange Dreamsicle

Okay love this product but I feel allmax is starting to rip people off by taking out things like glutamine or creative in there other products so I have to buy it separate the love the taste but no flavor in most of them very watery but I guess that's why it's so clean tasting I give it a 9 on the strawberry

Verified Buyer
  • 1 Chocolate Peanut Butter

I am sold on the IsoFlex product. After tasting the Chocolate Peanut Butter flavor I am returning it. It does not taste anything like the description and leaves an after taste in my mouth. Back to the vanilla for me.

  • 9 Banana
  • 10 Chocolate Peanut Butter

This would have to be the best ISO on the market. It's low carb and great for carb cycling. Honestly this is a pure as it comes for the taste that you get. If you haven't used this protein definitely give it a chance.

Verified Buyer
  • 9 Pineapple Coconut

This tasted far better than I ever thought it would. I would recommend it. It I a bit like drinking a tropical TUMS though but it is still pretty good. I drink it in the mornings. As for how it works... who knows. All of these whey Isolates are pretty much the same. If it holds true to it's claim, you will get more out of this protein than others. This one is considerably more expensive though. Something to think about.

Verified Buyer
  • 10 Caramel Macchiato

Taste great, mixes well. I mix it with skim milk, no clumps, not thick or heavy and no bad after taste after drinking. One of my favorite protein drinks!

† This price is the retail price for this product found at one or more retail websites in the last 30 days. The price may not include shipping cost, tax, sale or promotional prices, or discounts such as member pricing. Prices may change. verifies this price every 30 days.

What's in AllMax Nutrition IsoFlex

Directions For IsoFlex: Blend, Mix or Shake 1 rounded scoop (30g) with ~5 oz (150 ml, 3/4 of a cup) of cold water or low-fat milk, depending on desired taste and consistency, anytime you want an ultra-premium high-protein beverage.

Warnings: Use only as directed. For adult use only. Consult a health care practitioner prior to use if you are pregnant or breastfeed; if you have liver or kidney disease, or if you have been instructed to follow a low protein diet. Do not use if outer seal is broken. Store in a cool, dry place. KEEP OUT OF REACH OF CHILDREN. For additional information, see allergen warning.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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