Natural - UnflavoredUnflavored | GNC

Nature's Best® Natural Isopure


Item # 916091



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Size: 3 lb(s)

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Isopure Unflavored WPI powder contains 26 grams per serving of unadulterated 100% Whey Protein Isolate, stripped of fat, carbs, fillers, sugars and lactose. Easy to add to any food and beverage (hot or cold), and so pure you won’t even taste it.

That’s what we’re made of. It’s also what we stand for—protein that’s lactose-free, low calorie, with little or no fat and carbs, and no impurities. The purest stuff out there. Not to mention delicious. Beyond quality. This is protein with taste.
Pack in powerfully pure protein, without packing on the carbs. Our 100% whey protein isolate powders amp you up, without any unwanted weight. Just pick your level: Zero Carb or Low-Carb (which also has ZERO sugar), both with 25 grams of protein per scoop. It's 100% whey protein isolate loaded with vitamins, minerals and nutrients to keep you going strong—and always without gluten, lactose, or any impurities. Made with our complete microfiltration process to be the only completely clear milk protein when dissolved in water. Available in a range of delicious flavors to mix up some seriously delicious and dynamic recipes. Note: Zero/Low Carb Isopure powders have a vitamin/mineral premix which is not soluble; they will be cloudy when dissolved.


Add one rounded scoop of Isopure unflavored whey protein isolate to any of your favorite foods to increase your daily quality protein consumption. Isopure mixes with a spoon and is easily added to hot food, cold food or beverages. Drink one serving daily.
This product is produced in a facility with soy, dairy, egg and wheat ingredients, peanuts and tree nuts.


Notice: Use this product as a food supplement only. Do not use for weight reduction.

Warning:Accidental overdose of iron containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of the reach of children. In case of accidental overdose, call a physician or poison control center immediately.

Other Ingredients

Ion Exchange Whey (milk) Protein Isolate, Microfiltered Whey (Milk) Protein Isolate, Soy Lecithin
Dist. By:
Nature's Best®
Hauppauge, NY 11788

Nutrition Facts

Serving Size  1 Heaping Scoop(s)
Servings Per Container  47

Amount Per Serving     % DV

Calories 110  
  Calories from Fat 0  

Total Fat 0g  
  Saturated Fat 0g  
Trans Fat 0g  
Cholesterol 5mg   2%
Sodium 170mg   7%
Potassium 20mg   1%
  Dietary Fiber 0  
Protein 26g   52%

Vitamin A 0   0%
Vitamin C 0   0%
Iron 0   4%
Vitamin E 0   0%
Vitamin K 0   0%
Thiamin 0   0%
Riboflavin 0   0%
Vitamin B6 0   0%
Vitamin B12 0   0%
Phosphorous 0   2%
Iodine 0   0%
Magnesium 0   2%
Zinc 0   0%
Selenium 0   0%
Copper 0   0%
Chloride 0   20%

Calcium  0   **
Pantothenic Acid   0   **

** Daily Value (DV) not established.


4.9 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
good protein drink
Fast shipping, and it taste great!! I mix it with almond milk, ice and various fruits or veg.
June 13, 2018
1 month ago
There are not enough stars for this stuff! We love it! Tasteless. It mixes well into everything. Good hit of protein and you stay satisfied a long time.
April 26, 2018
3 months ago
Been using Isopure for 10 years and love it!
April 20, 2018
3 months ago
Perfect !!!!
April 16, 2018
3 months ago
The Best Quality Protein I've Tasted
Bought it for the quality ingredients (don't want fillers or artificial sweeteners). Tastes really GREAT!
April 9, 2018
3 months ago
Tastes Pretty Good
I was surprised at the size of the bottle but it contains enough powder for at least a month, maybe a week or two more. And, I was pleasantly surprised by the vanilla flavor. It does taste much better than other similar products I've tried and the price is right.
January 15, 2018
6 months ago
protein powder
i'm using this product as a dietary supplement after my bariatric surgery. I like this product compared to the other powders available in the market. its very light and easy to digest, compared to the other powders that leave a gritty, pasty taste and feel heavy after drinking. I like it unsweetened powder because that gives me an option to add my own flavor, sweet or savory. It also lets me control the amount of sweetness in my shake, because i like it less sweet. Sometimes I mix some instant coffee which actually comes out very good. One scoop of this powder gives almost 20 gram of protein, while the other products, i used 2 scoops. Isopure is a little more expensive than the others available, but the amount of powder used in one shake is less , so it lasts longer than the others. Overall i'm very happy with this product.
January 11, 2018
6 months ago
I use unflavored Isopure because it is pure whey. I donâ??t want any additional chemicals or flavorings in my protein powder. It is excellent. When I want to add flavor I just make a shake with milk, and banana or add a little OJ. Otherwise I just drink it straight with water. Pure protein!
January 9, 2018
7 months ago
Itâ??s a great product.
January 3, 2018
7 months ago
Perfect protein powder.
The pure protein with no additives is just what I have been looking for. It mixes well into my daily smoothies.
December 2, 2017
8 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 13 questions Browse 13 questions and 11 answers
Why did you choose this?
GNC Store
Want unflavored whey to get protein with no darbs or sugar, no flavorings. Even stevia creates a problem. This seems ot match these criteria.
Alice M on Apr 4, 2015
Want unflavored whey to get protein with no darbs or sugar, no flavorings. Even stevia creates a problem. This seems ot match these criteria.
Alice M on Apr 4, 2015
How many calories per scoop?
A shopper on Mar 28, 2018
Hi I want to know if I can drink it while Im pregnant? My gyn/ob recommend that I should take protein because I dont eat meat (beef, pork) Thanks
A shopper on Jul 30, 2013
BEST ANSWER: Yes, there is no warning about taking this while pregnant, but before starting any supplement, check with your personal physician.
Can I use this in recipes for cooking ? Many protein supplements cannot tolerate exposure to heat. Is there one that is better for cooking ?
A shopper on Feb 8, 2013
BEST ANSWER: When cooking with a whey-based protein, you will normally not lose any protein, however some of the other nutrients will degrade with heat. If you just want protein, heat in cooking is not a problem (since denaturing occurs naturally in digestion anyway.)
Is this product Lactose free?
A shopper on Oct 5, 2012
BEST ANSWER: No this product (Nature's Best Natural Isopure) is not lactose free. However the amount of lactose is very minimal.
Can I take this as a meal replacement?
Nancy G on Apr 27, 2018
BEST ANSWER: I don’t think by itself it is a meal replacement. However, if you combine with fruits and sometimes I add oatmeal it becomes a well balanced meal .
does it have egg in this product? as the label indicates that this product is processed with soy, wheat, tree nuts,egg etc???
A shopper on Oct 29, 2014
BEST ANSWER: There is no egg in the product. It is processed in a factory where other products use egg so it could come into accidental contact.
Is this product gluten free?
A shopper on Mar 10, 2013
BEST ANSWER: No, this line of product is not gluten free. It has wheat as an ingredient.
The description says that it is flavoured with can sugar, However, there is no sugar listed in the ingredients and the label say it is 0g carbs. What I should believe now?
A shopper on Nov 18, 2012
BEST ANSWER: Per the FDA website, anything less than 0.5g of carbohydrates is rounded down to 0 grams.
I need to be on a clear diet for a while. Does it mix clear?
A shopper on Oct 25, 2011
BEST ANSWER: It does not mix completely clear and it makes the liquid thicker. Not a good choice as a clear liquid diet item.
How many grams of sugar?
A shopper on Jun 2, 2011
BEST ANSWER: The label says 0 sugar
Re: Nature's Best Natural Isopure - Unflavored.

How many grams of protein per scoop does the above product contain?
A shopper on Mar 28, 2011
BEST ANSWER: 26 grams of protein per scoop
Each bottle contains 22 scoops correct each scoop contains 50 frams protein?? Thanks
A shopper on Mar 10, 2011
BEST ANSWER: This is a 3lbs container. It contains about 47 scoops. 26 grams of protein per scoop according to the label.
Can I take this while breastfeeding?
Cynthia H on Feb 27, 2018