Allmax Nutrition


Whey Protein Isolate Powder For Building Muscle*
Blend Of Muscle Building And Recovery Compounds For Improved Results*
9.1  out of 10  (527 Reviews)

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
527 Ratings
Verified Buyer Rating
139 Ratings
Average Flavor Rating
16 Flavors
Top Rated Flavor
Arctic Orange Milkshake
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.
Mar 23, 2020
Verified Buyer
  • 10 Vanilla

One of my favorite brands. Love this protein

Feb 05, 2020
Verified Buyer
  • 1 Orange Dreamsicle

This is my least favorite flavor and product from allmax. Luckily I only purchased the 2lbs cause I’m not a fan. It foams up so bad in my shakesphere bottle that the foam goes all the way up to the 18oz line. I don’t understand why this flavor does that, when the birthday cake flavor doesn’t. And as far as taste goes it’s my least favorite, probably due to all I’m drinking is foam.

Dec 13, 2019
Verified Buyer
  • 8 Chocolate Peanut Butter

The Chocolate Peanut Butter tastes good but it's not a 10. What I do like about the Pure Whey Protein Isolate Isoflex is the low total fat, zero cholesterol, and low carbs. I'm still using my first purchase of this so I won't comment on the results I get from muscle growth, soreness, etc. until I've finished the container.

Oct 22, 2019
Verified Buyer
  • 2 Pineapple Coconut

This Flavors is the worse flavor for isoflex!

Jun 19, 2019
Verified Buyer
  • 9 Caramel Macchiato

Curious with this flavor! Caramel macchiato is not as good as birthday cake. Birthday cake is the best flavor for Isoflex by far. But caramel macchiato is also good. Thumbs up to Allmax!

May 31, 2019
Verified Buyer
  • 10 Birthday Cake

Was skeptical of Bithday Cake, but it ended up tasting amazing, it also mixes well. Really good flavour, only downside is the price of the protein.

Apr 04, 2019
Verified Buyer
  • 10 Pineapple Coconut
  • 10 Banana
  • 10 Orange Dreamsicle
  • 9 Chocolate
  • 8 Birthday Cake

Allmax Isoflex has been my protein of choice for a while now. Taste is subjective, but compared to the other brands I have tried (Optimum, Dymatize, etc) Allmax is the most consistent. The protein mixes very well and the ingredients are top notch. My only issues with the protein is that it is relatively expensive. Dymatize is probably a better value, but Allmax is what I prefer. If Pineapple Coconut, Banana and Orange Dreamsicle are flavors that you enjoy the. I would highly recommend any of these flavors. Birthday Cake is on the sweet side, but I like to mix it with chocolate to balance out the sweetness.

Apr 02, 2019
Verified Buyer
  • 1 Vanilla

This is the worst tasting and smelliest vanilla protein power I have ever had. I tried mixing and blending in everything to get rid of the horrible taste and smell, but nothing helped( not even 3 shots of espresso). Do not get the vanilla flavor it will go into the trash can. I was shocked with the taste due to trying the chocolate peanut butter that I enjoyed very much. ALLMAX you need to change the formula on the vanilla asap. The taste and smell is horrible.

Mar 12, 2019
  • 1 Chocolate

Had serious issues with this product. The mixability of this product is garbage. As soon as you shake it or add it to a smoothie it begins to foam up - like a good 2-3" thick foam layer. Try to stomach this and you will get indigestion and a bloated stomach. Poor mixing and horrible foaming. Stay far away from this product as possible. I have issued a return to the store and contacted AllMax.

Nov 11, 2018
  • 10 Chocolate Mint

My personal favorite is chocolate mint. I can drink it and not get tired of the flavor. The price for a 5lb tub has been pretty affordable lately its been my go to isolate for a decade now.

Oct 21, 2018
Verified Buyer
  • 8 Chocolate Peanut Butter
  • 10 Birthday Cake

one of the best protein I had ever used

Sep 17, 2018
  • 9 Chocolate Peanut Butter
  • 10 Chocolate

Tried a couple samples and the recovery seemed good, although I do prefer the IsoNatural flavoring & sweetening more.

Sep 12, 2018
Verified Buyer
  • 10 Chocolate Peanut Butter
  • 10 Birthday Cake

2 Flavor easy to mix for any shake or just drink the protein

Sep 12, 2018
Verified Buyer
  • 5 Caramel Macchiato

For some reason the Caramel Macchiato flavor foams A LOT! Half of it is foam and makes it hard to drink. Other flavors such as chocolate, peanut butter chocolate and vanilla don't produce foam. I would buy this product but not his flavor again.

Jul 18, 2018
  • 9 Cookies & Cream

isolates are my favorite proteins and Isoflex is one of my favorites! quality ingredients and formulation plus great taste makes Isoflex an easy choice.

3 Sizes
1 Lb.
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1 Flavor
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Price: $26.99  ($1.93 / Serving)
Flavor Rating: 8.8
Blend Of Muscle Building And Recovery Compounds For Improved Results*

What's in Allmax Nutrition IsoFlex

1 Lb. Chocolate
Serving Size: 1 Scoop (30 g)
Servings Per Container: ~14
Amount Per Serving % Daily Value
Calories 110       
Calories from Fat 0       
Total Fat 0 g 0%*
Saturated Fat 0 g 0%*
Trans Fat 0 g
Cholesterol 0 mg 0%
Total Carbohydrate 1 g <1%*
Dietary Fiber 0 g 0%*
Sugars 0 g
Protein 27 g 54%*
Calcium 60 mg 6%
Iron 1.4 mg 8%
Sodium 110 mg 5%
Potassium 170 mg 5%
* Percent Daily Values are based on a 2,000 calorie diet.
‡ Daily Value not established.
HYBRID-RATIO ION-FILTERED WHEY PROTEIN ISOLATE (Cross-Flow, Ultra-Filtered Whey Protein Isolate, Ion-Charged Particle-Filtered Whey Protein Isolate, Alpha-Lactalbumin-Rich Whey Isolate), PROTEIN ENZYME BLEND (Protease, Bromelain), Cocoa Powder, Natural and Artificial Flavors, Guar Gum, Lecithin (Sunflower), Acesulfame Potassium, Sucralose.
ALLERGEN WARNING: Contains Milk (Whey). Produced in a facility that also handles soy, egg, peanut, tree nut, fish, crustacean and shellfish products.

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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