# GNC Protein Powder Review > GNC protein powder reviewed from the label: AMP Wheybolic's 40 g two-scoop serving, Ripped and the bottled shake, cost per 25 g and when ON or ISO100 wins. - **URL**: https://www.best-proteinpowder.com/gnc-protein-powder-review/ - **Updated**: 2026-11-02 - **Author**: [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/) - **Publisher**: [Best Protein Powder](https://www.best-proteinpowder.com/) --- GNC's house-brand protein is built around AMP Wheybolic, a whey powder with a 40 g serving. Here is what that serving really is, which GNC product to buy, and when a mainstream whey is the better deal. **How we rank:** We judge every powder on the label, not the marketing: protein per scoop, cost per 25 g of protein, the full ingredient list and third-party testing. No paid placements, and commission never sets a ranking. [Read our methodology](https://www.best-proteinpowder.com/how-we-test/) GNC AMP Wheybolic is a solid, high-dose whey with a marketing problem: its 40 g of protein per serving comes from two scoops, so it is not stronger than other whey, just bigger. Per GNC's labels at the time of writing, a two-scoop serving gives 40 g of protein in roughly 200 to 220 calories depending on the version. Judge it on cost per 25 g of protein, not grams per serving, and buy it when GNC's sale price beats Optimum Nutrition or Dymatize. ## Our Top Picks | Award | Product | Why | | --- | --- | --- | | Best GNC Pick | [GNC AMP Wheybolic Whey Protein Powder](https://www.best-proteinpowder.com/gnc-protein-powder-review/#gnc-amp-wheybolic) | A good high-dose whey worth buying on a GNC sale; compare it per 25 g, not per scoop. | | Best for Cutting | [GNC AMP Wheybolic Ripped Whey Protein](https://www.best-proteinpowder.com/gnc-protein-powder-review/#gnc-amp-wheybolic-ripped) | A lean high-dose whey for cutting, but not essential: one scoop of regular Wheybolic does much the same. | | Best Ready-to-Drink | [GNC AMP Wheybolic 40 Protein Shake (Ready to Drink)](https://www.best-proteinpowder.com/gnc-protein-powder-review/#gnc-amp-wheybolic-40-protein-shake) | The GNC product to grab when you cannot mix a shake, not the one to drink every day. | | Alternative: Best Value Whey | [Optimum Nutrition Gold Standard 100% Whey](https://www.best-proteinpowder.com/gnc-protein-powder-review/#optimum-nutrition-gold-standard-100-whey) | The everyday whey that usually beats GNC's house brand on cost per gram. | | Alternative: Certified Isolate | [Dymatize ISO100 Hydrolyzed Whey Isolate](https://www.best-proteinpowder.com/gnc-protein-powder-review/#dymatize-iso100-hydrolyzed) | The pick over GNC if you need certification or have trouble with lactose. | ## 1. The Short Verdict GNC AMP Wheybolic is a competent whey protein powder. It is easy to find in GNC stores, widely discounted in the chain's frequent sales, and it delivers a big 40 g of protein per serving with low fat and sugar, per GNC's labels at the time of writing. Nothing on the label we could confirm is a red flag, and buyers generally rate the flavors as easy to drink. The catch is the serving size. That 40 g headline is a two-scoop serving, roughly double what most whey labels list for one scoop. Gram for gram, AMP Wheybolic is about as protein-dense as any other good whey, not more. A tub with 25 servings of 40 g holds the same protein as a tub with 40 servings of 25 g, so the only honest way to compare it is the cost per 25 g of protein. On that measure, it depends entirely on the price you pay. At GNC's regular shelf price, AMP Wheybolic is usually more expensive per gram than Optimum Nutrition Gold Standard or Dymatize ISO100 on Amazon. During GNC's frequent promotions, it can be competitive. Our [best whey protein powder rankings](https://www.best-proteinpowder.com/best-whey-protein-powder/) list the brands that are cheaper per gram most of the time. So the verdict is simple. Buy AMP Wheybolic if you shop at GNC anyway, you catch it on sale, and you like a big shake. Use one scoop instead of two if you do not need 40 g at once. Buy a mainstream whey on Amazon if you want the best price per gram every day, or a certified isolate if you compete in drug-tested sport. > **THE VERDICT** > > **A good whey with a doubled serving. Compare it per 25 g, not per scoop.** > > AMP Wheybolic is worth buying on a GNC sale. At full price, Optimum Nutrition Gold Standard or Dymatize ISO100 usually costs less per gram of protein. ## 2. Who Makes GNC Protein GNC, originally General Nutrition Centers, is one of the oldest supplement retailers in the US. It grew from a single health food store opened in Pittsburgh in 1935 into a national chain of stores, and it has sold its own house-brand supplements for decades alongside third-party brands like Optimum Nutrition and Dymatize. After filing for bankruptcy in 2020, the company was bought by Harbin Pharmaceutical Group, a Chinese pharmaceutical company that was already a major investor. Its protein powders sit in several house lines. AMP, short for Advanced Muscle Performance, is the performance line, and AMP Wheybolic is its flagship whey. GNC Pro Performance is the long-running mainstream sports line, which includes a basic 100% Whey. GNC also sells weight-management and specialty proteins under other names, and the line-up changes as products are reformulated and renamed. Because GNC owns both the brand and the stores, its protein is priced and promoted differently from brands sold everywhere. Shelf prices are often high, but the chain runs frequent sales, member pricing and bundle deals, so the price you actually pay can vary widely week to week. That matters more for GNC protein than for almost any other brand when you work out value. We have not tasted or tested GNC's proteins ourselves. This review is built from GNC's product labels as published on its listings, retailer listings and nutrition-tracker entries that copy the label. Taste and mixing notes are buyer feedback. GNC's site blocked automated access when we checked, so where we could not confirm a figure, such as the current Pro Performance whey label, we say so instead of guessing. ## 3. What the AMP Wheybolic Label Says AMP Wheybolic is sold as a whey protein powder with a serving of two scoops. GNC's labels for the Natural Chocolate and Natural Vanilla versions list 40 g of protein and about 220 calories per two-scoop serving, with about 2 g of fat and 25 servings per container, at the time of writing. Nutrition trackers that copy the regular-flavor label show about 20 g of protein and 100 calories per single scoop of roughly 31 g, with about 3 g of carbohydrate and 1 g of sugar. | Product | Serving | Protein | Calories | Notes | | --- | --- | --- | --- | --- | | AMP Wheybolic (Natural flavors) | 2 scoops | 40 g | About 220 | About 25 servings per tub | | AMP Wheybolic (regular flavors) | 1 scoop, about 31 g | About 20 g | About 100 | Per trackers copying the label | | AMP Wheybolic Ripped | 2 scoops | 40 g | About 200 | About 22 servings per tub | | AMP Wheybolic 40 shake | 1 bottle | 40 g | About 190 | About 6 g carbs, 1 g sugar | Those numbers translate to roughly 20 g of protein per 31 g scoop, or about 65 percent protein by weight. That is typical of a good whey blend: lower than a pure isolate, which tends to run closer to 80 to 90 percent, and in line with mainstream blends such as Optimum Nutrition Gold Standard. Low sugar and low fat confirm that most of each scoop is protein. GNC markets AMP Wheybolic with BCAAs and leucine on the front of the tub, which is a feature of every whey, since whey is naturally rich in leucine. A 40 g serving of whey carries roughly 4 g of leucine, well above the 2 to 3 g often cited as enough to maximize the muscle-building response to a meal. A single scoop of about 20 g sits at the lower end of that range. We could not confirm the full ingredient list or sweeteners for every current flavor from a source we could access, so check the tub if you avoid particular sweeteners or need to know whether the protein is isolate, concentrate or a blend. If lactose bothers you, that detail matters, and our [whey vs whey isolate guide](https://www.best-proteinpowder.com/whey-vs-whey-isolate/) explains why. ## 4. GNC Protein Products and Alternatives, Ranked GNC sells several house-brand proteins, but AMP Wheybolic is the line it builds around. The three GNC products below are the ones whose labels we could confirm from GNC's listings at the time of writing. Two clearly labelled alternatives from other brands follow, because for many buyers a mainstream whey is the better buy on Amazon. GNC products are sold mainly through GNC stores and gnc.com, so check the seller before buying them elsewhere. ### 1. GNC AMP Wheybolic Whey Protein Powder **Award:** Best GNC Pick | **Type:** Whey protein powder, 40 g two-scoop serving - **Protein / serving:** 40 g (2 scoops, label) - **Calories:** About 200-220 - **Third-party testing:** Third-party tested (listing) - **Best for:** Big lifters, GNC shoppers AMP Wheybolic is GNC's flagship whey and the house-brand protein to buy if you shop at GNC. Per GNC's labels at the time of writing, a two-scoop serving gives 40 g of protein in about 200 to 220 calories depending on the version, with low fat and sugar, and the Natural Chocolate and Natural Vanilla tubs list about 25 servings. A single scoop gives about 20 g, which is plenty for many people. It is marketed with BCAAs and leucine and described as third-party tested in retail listings. **Bottom line:** A good high-dose whey worth buying on a GNC sale; compare it per 25 g, not per scoop. **Pros:** - 40 g of protein per two-scoop serving (label) - Low fat and sugar per scoop - Wide flavor choice in GNC stores - Frequent GNC sales can make it competitive **Cons:** - The 40 g is two scoops, not a denser protein - Usually pricier per 25 g than ON or Dymatize at full price - No sport certification we could confirm [Check price on Amazon](https://www.amazon.com/dp/B0GJG2W1B8?tag=sktiger-20&linkCode=ll1) ### 2. GNC AMP Wheybolic Ripped Whey Protein **Award:** Best for Cutting | **Type:** Whey protein powder, cutting formula - **Protein / serving:** 40 g (2 scoops, label) - **Calories:** About 200 - **Servings:** About 22 - **Best for:** Cutting phases Wheybolic Ripped is the version GNC markets for cutting phases. GNC's label lists 40 g of protein in about 200 calories per two-scoop serving, with about 22 servings per tub, at the time of writing, so it is slightly leaner per serving than the Natural Wheybolic tubs. Cutting-focused formulas can include extra ingredients beyond protein, so read the label before you buy. For most people in a calorie deficit, regular Wheybolic used at one scoop does the same job. **Bottom line:** A lean high-dose whey for cutting, but not essential: one scoop of regular Wheybolic does much the same. **Pros:** - 40 g of protein in about 200 calories (label) - Slightly leaner than the Natural tubs - Same flavor-friendly whey base **Cons:** - Fewer servings per tub - Check the label for extra cutting ingredients - No confirmed sport certification [Check price on Amazon](https://www.amazon.com/dp/B08ZT1DC22?tag=sktiger-20&linkCode=ll1) ### 3. GNC AMP Wheybolic 40 Protein Shake (Ready to Drink) **Award:** Best Ready-to-Drink | **Type:** Ready-to-drink protein shake - **Protein / serving:** 40 g (label) - **Calories:** About 190 - **Sugar:** About 1 g - **Best for:** Convenience, travel The bottled AMP Wheybolic 40 is one of the higher-protein ready-to-drink shakes on the market. GNC's label lists 40 g of protein, about 190 calories, 1.5 g of fat, 6 g of carbohydrate and 1 g of sugar per bottle at the time of writing, sold in 4-packs and 12-packs. That beats the 20 to 30 g most bottled shakes provide. Like every ready-to-drink shake, it costs more per gram than powder, so use it for convenience rather than as your main protein. **Bottom line:** The GNC product to grab when you cannot mix a shake, not the one to drink every day. **Pros:** - 40 g of protein per bottle (label) - Only about 1 g of sugar - No mixing, good for gym bags and travel **Cons:** - Much higher cost per gram than powder - A large single dose for smaller people [Check price on Amazon](https://www.amazon.com/s?k=GNC%20AMP%20Wheybolic%2040%20Protein%20Shake%20(Ready%20to%20Drink)&tag=sktiger-20) ### 4. Optimum Nutrition Gold Standard 100% Whey **Award:** Alternative: Best Value Whey | **Type:** Whey blend led by isolate - **Protein per serving:** About 24 g (label) - **Calories:** About 120 - **Third-party testing:** Informed Choice on many flavors (brand) - **Best for:** Value, everyday use Gold Standard is the benchmark mainstream whey and the one AMP Wheybolic needs to beat on price. Per the label at the time of writing it delivers about 24 g of protein in roughly 120 calories per scoop, from a blend led by whey isolate, and Optimum Nutrition promotes Informed Choice certification on many flavors. In the large tubs on Amazon it is usually one of the cheapest per 25 g of protein among the major brands, and two scoops give you a 48 g shake if you want GNC-sized servings. **Bottom line:** The everyday whey that usually beats GNC's house brand on cost per gram. **Pros:** - About 24 g of protein per scoop (label) - Informed Choice on many flavors, per the brand - Usually low cost per 25 g in large tubs - Huge flavor range **Cons:** - Blend rather than pure isolate - Certification varies by flavor, so check yours [Check price on Amazon](https://www.amazon.com/dp/B000GISTZ4?tag=sktiger-20&linkCode=ll1) ### 5. Dymatize ISO100 Hydrolyzed Whey Isolate **Award:** Alternative: Certified Isolate | **Type:** Hydrolyzed whey protein isolate - **Protein per serving:** About 25 g (label) - **Calories:** About 120 - **Third-party testing:** Informed Choice (brand) - **Best for:** Tested athletes, lactose-sensitive ISO100 is the alternative for lactose-sensitive buyers and drug-tested athletes. Per the label at the time of writing it gives about 25 g of protein in roughly 120 calories per scoop with about 1 g of sugar, from hydrolyzed whey isolate and whey isolate, and Dymatize states it carries Informed Choice certification. Isolate is filtered to remove most lactose, so it is the safer pick for people who get bloated on blends. It usually costs a little more per gram than Gold Standard. **Bottom line:** The pick over GNC if you need certification or have trouble with lactose. **Pros:** - About 25 g of protein per scoop (label) - Informed Choice certified, per the brand - Isolate, lower in lactose **Cons:** - Costs a little more per gram than Gold Standard - Thinner texture than a blend [Check price on Amazon](https://www.amazon.com/dp/B099J2SWXV?tag=sktiger-20&linkCode=ll1) ## 5. Do You Need 40 g of Protein in One Shake? For most people, no. Research on protein timing generally finds that around 20 to 25 g of high-quality protein, or about 0.25 to 0.4 g per kg of body weight, captures most of the muscle-building response to a single meal for many people. A 40 g shake is not wasted, because the extra protein still counts toward your daily total, but the extra muscle benefit from the second 20 g is usually modest. There are exceptions. A study by Macnaughton and colleagues in 2016 found that 40 g of whey after a whole-body resistance workout produced a larger muscle-building response than 20 g in trained young men. Larger lifters, people training many muscles in one session, and older adults, who tend to need more protein per meal to get the same response, may all reasonably use a bigger serving. What matters far more is your total daily protein. Many guidelines for people who train suggest roughly 1.6 g per kg of body weight a day, spread over three or four meals. If a 40 g shake helps you reach that number easily, it is doing its job. Our [protein needs guide](https://www.best-proteinpowder.com/how-much-protein-do-i-need/) and [timing guide](https://www.best-proteinpowder.com/when-to-take-protein-powder/) walk through the numbers. The practical takeaway is that you control the serving. If 40 g is more than you need, use one scoop and the tub lasts twice as long, which makes the per-serving price look much better. If you are a large lifter trying to hit 180 g or more a day, the two-scoop serving is a convenient way to get there. Either way, the scoop size does not make the protein better. ## 6. Cost per 25 g of Protein Because AMP Wheybolic's serving is twice the usual size, its price per serving always looks high. The fair comparison is cost per 25 g of protein. A tub with 25 servings of 40 g holds about 1,000 g of protein. Divide the price you pay by 40, and you have the cost per 25 g. For example, a hypothetical $60 tub works out at $1.50 per 25 g, and the same tub at $45 on promotion works out at about $1.13. > **By the Numbers (natural flavors)** > > - **40 g**: Protein per 2 scoops > - **25**: Servings per tub > - **~1,000 g**: Protein per tub > - **Price / 40**: Cost per 25 g We are not quoting a single GNC price because it moves so much. GNC's shelf prices change often, and the chain runs regular sales and member deals that can cut the price sharply. Check the actual price on the day, then run the calculation. Mainstream wheys like Optimum Nutrition Gold Standard usually land at around $1 to $1.25 per 25 g in large tubs on Amazon, which is the benchmark AMP Wheybolic needs to beat. The ready-to-drink AMP Wheybolic 40 shake is a different calculation. Bottled protein always costs more per gram than powder, because you are paying for the liquid, the bottle and the convenience. Use it for days when you cannot mix a shake, not as your everyday protein. Our [best protein drink guide](https://www.best-proteinpowder.com/best-protein-drink/) compares bottled shakes on cost and label. If price per gram is your main priority, our [cheap protein powder guide](https://www.best-proteinpowder.com/best-cheap-protein-powder/) ranks powders purely on cost per 25 g. GNC's own proteins rarely top that list at regular prices, but a good sale can put AMP Wheybolic in the same range as the best-value mainstream tubs. ## 7. Wheybolic, Ripped, Shakes and Pro Performance AMP Wheybolic is the flagship and the one to buy if you are choosing a GNC protein. It comes in regular flavors and in Natural Chocolate and Natural Vanilla versions, which GNC lists at 40 g of protein and about 220 calories per two scoops. Buyers tend to pick it for the high dose and the wide flavor choice in GNC stores. AMP Wheybolic Ripped is the cutting-focused version. GNC's label lists 40 g of protein in about 200 calories per two-scoop serving and about 22 servings per tub, at the time of writing. Versions marketed for cutting often include extra ingredients, so read the label before assuming it is just a leaner whey. For most people, regular Wheybolic or a plain isolate does the same job in a calorie-controlled diet. The AMP Wheybolic 40 ready-to-drink shake comes in 4-packs and 12-packs. GNC's label lists 40 g of protein, about 190 calories, 1.5 g of fat, 6 g of carbohydrate and 1 g of sugar per bottle. That is a strong bottled-shake profile, with more protein than most ready-to-drink options, which typically run 20 to 30 g. GNC Pro Performance 100% Whey is the long-running budget-leaning line many people search for. We could not confirm its current label from a source we could access, so we have not given it a product card or figures here. If you see it in a store, compare it with AMP Wheybolic on cost per 25 g using the label on the tub. Our [Pure Protein review](https://www.best-proteinpowder.com/pure-protein-powder-review/) and [Muscle Milk review](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/) cover other mainstream wheys in the same price tier. ## 8. Testing and Clinical Claims Retail listings for AMP Wheybolic describe it as third-party tested, and GNC is large enough to run its own quality programs. What we could not confirm is a sport certification, such as NSF Certified for Sport or Informed Choice, for the current AMP Wheybolic tubs. Those programs test for banned substances and are the standard drug-tested athletes should rely on. If you compete under drug testing, choose a product listed in the NSF Certified for Sport or Informed Sport databases, and check the specific flavor and batch. Dymatize ISO100 and many Optimum Nutrition Gold Standard flavors are commonly cited with Informed Choice certification, per those brands, which makes them safer choices for tested athletes than a product without a confirmed certification. GNC also markets AMP Wheybolic as clinically proven to increase muscle strength and support muscle building. We could not review the study behind that claim, so we cannot tell you how it was designed or what it compared. More broadly, research consistently shows that adequate protein, including whey, supports strength and muscle gains when combined with resistance training. That is true of good whey in general, not a unique property of one product. For heavy metals and contaminants, whey generally tests cleaner than plant proteins and cocoa-heavy products, though chocolate flavors of any protein tend to carry more lead than vanilla. Our [protein powder safety guide](https://www.best-proteinpowder.com/is-protein-powder-safe/) explains what testing claims mean and what to ask a brand for. ## 9. Who Should Skip It Skip AMP Wheybolic if you mainly want the cheapest protein per gram and do not shop at GNC. At regular shelf prices, mainstream wheys sold on Amazon are usually cheaper per 25 g of protein, and our [whey protein rankings](https://www.best-proteinpowder.com/best-whey-protein-powder/) name the best-value options. Skip it if you compete in a drug-tested sport and need a certified product, since we could not confirm a sport certification. Choose a product listed with NSF Certified for Sport or Informed Sport and verify the flavor in the certifier's database. Skip it, or check the label carefully, if you are lactose intolerant, since we could not confirm whether every flavor is isolate-based. A pure isolate is the safer choice for lactose sensitivity. Skip the 40 g serving if you are a smaller person, eat plenty of protein already, or are watching calories closely. One scoop of about 20 g is enough for many people per shake, and you can halve the serving without any downside. Using two scoops by default can add 100 or more calories a day you do not need. Anyone with kidney disease, who is pregnant or breastfeeding, or who takes medication should talk to a doctor or registered dietitian before using a high-protein supplement regularly. This review is not medical advice. Healthy adults generally tolerate whey protein well at normal doses, but a 40 g serving is a large single dose. ## 10. GNC vs Optimum Nutrition vs Dymatize Optimum Nutrition Gold Standard 100% Whey is the benchmark mainstream whey. Per the label at the time of writing, a scoop delivers about 24 g of protein in roughly 120 calories, from a blend led by whey isolate, and Optimum Nutrition promotes Informed Choice certification on many flavors. In the large 5 lb tubs it is usually one of the cheapest per gram among the major brands. Our [Optimum Nutrition review](https://www.best-proteinpowder.com/optimum-nutrition-protein-powder-review/) covers the range. Dymatize ISO100 is the isolate alternative. It lists about 25 g of protein in roughly 120 calories per scoop with about 1 g of sugar, per the label, and Dymatize states it carries Informed Choice certification. It is the better pick for lactose-sensitive buyers and tested athletes, and it usually costs a little more per gram than Gold Standard. Our [Dymatize review](https://www.best-proteinpowder.com/dymatize-protein-powder-review/) compares ISO100 with Elite Whey. Compared with those two, AMP Wheybolic's advantages are the big serving, the GNC store convenience and the sale pricing. Its disadvantages are a regular price that is usually higher per gram and no sport certification we could confirm. Use two scoops of Gold Standard and you have a 48 g shake anyway, so the 40 g serving is not a real point of difference. The sensible approach is to buy whichever of the three is cheapest per 25 g of protein on the day, unless you need certification, in which case choose ISO100 or a certified Gold Standard flavor. For bigger-picture comparisons, our [muscle gain protein powder guide](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/) and [whey isolate rankings](https://www.best-proteinpowder.com/best-whey-protein-isolate/) go further. ## 11. Common Mistakes to Avoid ### Comparing grams per serving instead of per gram AMP Wheybolic's 40 g serving is two scoops, so a tub of 25 servings holds the same protein as a tub of 40 servings at 25 g. Always divide the price by total grams of protein and multiply by 25. That is the only fair way to compare it with other whey. ### Paying full price at GNC GNC's shelf prices are often high, but the chain runs frequent sales, bundles and member deals. Buying AMP Wheybolic at regular price usually makes it more expensive per gram than mainstream whey on Amazon. Wait for a promotion, or buy a rival that is cheaper on the day. ### Using two scoops by default Most people get most of the muscle-building benefit of a meal from around 20 to 25 g of protein. Two scoops adds about 100 calories and halves the life of the tub. Start with one scoop and use two only after big full-body sessions or if you need the extra protein to hit your daily target. ### Assuming third-party tested means certified A listing that says third-party tested is not the same as NSF Certified for Sport or Informed Sport, which screen for banned substances. If you compete under drug testing, choose a product that appears in a certifier's database and check the exact flavor and batch before you buy. ### Treating the shake as your main protein The ready-to-drink AMP Wheybolic 40 has a strong label, but bottled shakes cost far more per gram than powder. Keep a few for travel and busy days and get your everyday protein from food and powder. Anyone with kidney disease should check high-protein products with a doctor. ## 12. Frequently Asked Questions ### Is GNC protein powder good? GNC AMP Wheybolic is a good, mainstream whey. Per GNC's labels, a two-scoop serving gives 40 g of protein in about 200 to 220 calories with little fat or sugar. It is not more potent than other whey, just a bigger serving. Its value depends on price: on a GNC sale it is competitive; at full price, rivals are usually cheaper per gram. ### How much protein is in GNC AMP Wheybolic? GNC lists 40 g of protein per two-scoop serving, about 20 g per scoop. The Natural Chocolate and Natural Vanilla tubs list about 220 calories per serving and about 25 servings per container, and the Ripped version lists about 200 calories with about 22 servings, at the time of writing. Check your tub, since figures vary by flavor. ### Is AMP Wheybolic better than Optimum Nutrition Gold Standard? Not on protein quality. Both are good whey proteins, and Gold Standard's 24 g scoop is simply smaller than Wheybolic's 40 g two-scoop serving. Gold Standard usually costs less per 25 g of protein on Amazon and promotes Informed Choice certification on many flavors. AMP Wheybolic can win on price during GNC sales. ### What is the difference between AMP Wheybolic and Wheybolic Ripped? Ripped is the version GNC markets for cutting. Per GNC's labels, it lists 40 g of protein in about 200 calories per two-scoop serving, a little leaner than the Natural Wheybolic tubs at about 220, with fewer servings per tub. Cutting formulas can include extra ingredients, so read the label. For most people, regular Wheybolic at one scoop does the same job. ### Is GNC Pro Performance 100% Whey still worth buying? We could not confirm the current Pro Performance whey label from a source we could access, so we have not rated it here. If you find it in a GNC store, compare it with AMP Wheybolic and mainstream brands on cost per 25 g of protein using the label on the tub. That calculation decides which is the better value. ### Is GNC AMP Wheybolic third-party tested? Retail listings describe AMP Wheybolic as third-party tested, but we could not confirm a sport certification such as NSF Certified for Sport or Informed Choice for the current tubs. Drug-tested athletes should choose a product listed in a certifier's database, such as Dymatize ISO100, which Dymatize states is Informed Choice certified, and check the specific flavor. ### Where can I buy GNC protein powder? Mainly at GNC stores and on gnc.com, where sales and member deals change the price often. GNC products also appear at other retailers such as Walmart and with online sellers. If you buy outside GNC, check that the seller is reputable and the product is in date, and compare the cost per 25 g of protein with mainstream wheys on Amazon. ## Related Whey Protein Guides - [Best Whey Protein Powder](https://www.best-proteinpowder.com/best-whey-protein-powder/): The best wheys ranked on cost per 25 g, testing and label. - [Optimum Nutrition Protein Powder Review](https://www.best-proteinpowder.com/optimum-nutrition-protein-powder-review/): Gold Standard and the rest of the ON range, label-checked. - [Dymatize Protein Powder Review](https://www.best-proteinpowder.com/dymatize-protein-powder-review/): ISO100 vs Elite Whey, and when the isolate is worth it. ## The Bottom Line GNC AMP Wheybolic is a solid whey protein with a big two-scoop serving: 40 g of protein in about 200 to 220 calories, per GNC's labels at the time of writing. The serving size makes it look stronger than other whey, but gram for gram it is a typical good whey blend, and its value depends on the price you pay at GNC. Buy it on a GNC sale if you like the flavors and the store convenience, and use one scoop if 40 g is more than you need. If you want the lowest everyday cost per gram, Optimum Nutrition Gold Standard is usually cheaper, and if you need certification or have trouble with lactose, Dymatize ISO100 is the better pick. ## More in Brand Reviews Guides in this category that pair with what you just read. - [Best Whey Protein Powder](https://www.best-proteinpowder.com/best-whey-protein-powder/) - [Muscle Milk Protein Powder Review](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/) - [Pure Protein Powder Review](https://www.best-proteinpowder.com/pure-protein-powder-review/) About the Author [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/), Supplements Desk The editorial team reads the label, the certificate and the price per gram of protein before a powder gets near a ranking -- and says plainly when a cheaper tub does the same job. [Full profile](https://www.best-proteinpowder.com/authors/editorial-team/) | [How we test](https://www.best-proteinpowder.com/how-we-test/)