GNC Pro Performance Whey Review — Do Generic Brands Measure Up?

One of the most inexpensive whey proteins actually has a lot to offer.

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If you live in the United States, you almost certainly know the brand GNC. The supplement store giant has over six thousand stores in America and locations in about fifty other countries.

There’s a good chance you already buy your supplements at GNC. If you’re like me, you might think twice about buying the generic whey protein that’s made by the supplement store.

I decided to put my assumptions to the test. Could GNC Pro Performance Whey actually be a great protein powder? I was happy to find that it has a solid combination of macronutrients and micronutrients on par with most of its competitors, plus it’s a great pick if you want to save money on protein.

GNC Pro Performance Whey
GNC Pro Performance Whey
GNC Pro Performance Whey
A very inexpensive whey protein that's unusually low in sodium.

GNC Pro Performance Nutrition Info

One scoop delivers:

140 calories

24 grams of protein
6 grams of carbs (1 gram of fiber and 2 grams of sugar)
2 grams of fat (1 gram of saturated fat).

It’s relatively low in sodium with 3 percent of the recommended daily intake, but a little high in cholesterol with 20 percent of the RDI.

GNC Pro Performance Ingredients

The first ingredient is whey concentrate, which is cheaper and has more fat and carbs than whey isolate. This is one reason why one serving has twice as many carbs compared as big name competitors like Optimum Nutrition Gold Standard or MusclePharm Combat Whey, which have whey isolate as the first ingredient.

GNC Pro Performance Whey Protein Ingredients

So first on the ingredients label is whey concentrate, then whey isolate, then cocoa powder, natural flavors, cellulose gum (a thickener and stabilizer), soy lecithin (to improve mixability), xanthan gum, the artificial sweetener acesulfame potassium, sodium chloride (that’s just salt), and sucralose, also called Splenda®.

GNC Pro Performance Benefits and Effectiveness

There are no real shocks in this ingredients list, though it is a little unusual to have more acesulfame potassium (or Ace-K) than sucralose. It’s typically the last ingredient on a label and it’s one of the more controversial sweeteners you’ll find in a protein powder due to some (debatable) links between Ace-K and impaired insulin response.(1)

It’s probably fine for you, but if you’re wary of it, most of its competitors contain it in lower doses.

Otherwise, it’s worth noting that GNC and Optimum Nutrition and Isopure all get their whey from Glanbia, one of the largest-scale producers of American style cheeses — whey can be a byproduct of cheesemaking, and Glanbia uses it to make protein supplements. So the quality of the whey itself should be on par with those more popular brands.

[See our top protein powder picks]

GNC Pro Performance Whey Protein Taste
GNC Pro Performance Whey Protein Taste

That said, there are a few things you might take issue with: GNC’s whey has the aforementioned artificial sweeteners, it contains soy (which some athletes worry can affect their hormones), and it has twice as many carbs as its “sister brands” Optimum Nutrition and Isopure.

Truthfully, the carbohydrate count is the only thing really worth noting here. Almost every whey protein has artificial sweeteners and soy lecithin, but it’s rare to see one with 6 grams of carbs for 24 grams of protein. That’s about twice the carb count you’d usually find and it means this is less protein dense than the average whey supplement.

On top of that, it doesn’t contain any digestive enzymes. Optimum Nutrition and a lot of other protein powders that contain whey concentrate include digestive enzymes like lactase and Aminogen in their ingredients in order to reduce digestive issues among people with lactose sensitivities.(2) (Whey isolates often don’t contain enzymes because they’re usually lactose-free.) If you have trouble with lactose, this might not be for you.

GNC Pro Performance Price

You can pick up a 1.96-pound tub of 25 servings for $20. That’s 80 cents per serving or 3.33 cents per gram of protein.

That’s very, very cheap. When looking at 2- or 3-pound tubs, it’s cheaper than MuscleTech’s Premium Gold (3.4 cents per gram of protein), MusclePharm’s Combat Whey (3.84 cents per gram), Isopure Low Carb (3.86 cents per gram) and Optimum Nutrition (4.31 cents per gram).

For a protein powder that contains whey isolate (which increases the price), it’s one of the cheapest on the market.

GNC Pro Performance Whey Protein Price


It dissolves quickly and easily, but it dissolved better in water than in milk. With milk, I found it was just a little grainy in parts.

GNC Pro Performance Taste

What’s unusual about this product is that it has no artificial flavors but it does have artificial sweeteners. The flavor, in the end, is very mild and reminds me of naturally sweetened protein powders like Xwerks and Muscle Feast: tasty with milk, bland with water.

The Takeaway

This is a fine product that tastes great, mixes well, and is very, very cheap. It has the same issues a lot of cheaper protein powders in that it contains soy and artificial sweeteners, which you may want to avoid.

When compared to other cheap protein powders, the main difference is that it contains more whey carbs. But if you can find room for them in your macros, it’s a pretty decent supplement, especially if you’re after a cheaper whey.

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1. Liang Y, et al. The effect of artificial sweetener on insulin secretion. 1. The effect of acesulfame K on insulin secretion in the rat (studies in vivo). Horm Metab Res. 1987 Jun;19(6):233-8.
2. Oben J, et al. An open label study to determine the effects of an oral proteolytic enzyme system on whey protein concentrate metabolism in healthy males. J Int Soc Sports Nutr. 2008 Jul 24;5:10.

GNC Pro Performance Whey

Per Serving: $0.80












  • Very inexpensive
  • Tasty
  • Low in sodium


  • A little high in carbs and fat
  • No digestive enzymes
  • Contains soy and artificial sweeteners