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Our ReviewGNC AMPSustained Protein Blend

GNC AMP Sustained Protein Blend delivers 25g of fast and slow-digesting proteins per serving to support muscle recovery throughout the day.
GMC AMP Sustained Protein Blend
25gProtein
4gnCarbs
1.5gFAT
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The GNC AMP Sustained Protein Blend is designed for those who are looking to support muscle recovery and growth over an extended period. It features a multi-source protein blend, including native micellar casein, whey protein isolate, whey protein hydrolysate, and egg white protein, providing both fast and slow-digesting proteins. Each 35g scoop delivers 25g of protein, 1.5g of fat, and 4g of carbohydrates, making it a well-rounded option for athletes who want consistent muscle support throughout the day or after intense workouts. The addition of calcium and potassium also supports hydration and muscle function, ensuring you get more out of each serving. Whether you're looking for a post-workout shake or a meal replacement, this blend provides a steady release of amino acids to fuel your body efficiently.

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Ingredients

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GNC AMP Sustained Protein Blend’s ingredient profile centers around a combination of multiple protein sources, making it suitable for those looking for both quick muscle repair and longer-lasting protein absorption. The core component of this product is the Sustained Protein Blend, which includes native micellar casein, whey protein isolate, whey protein hydrolysate, and egg white protein. These proteins each offer distinct benefits.

Protein Matrix
Micellar Casein
Whey Isolate
Hydrolized Whey
Egg Protein

Micellar casein is a slow-digesting protein, releasing amino acids over up to 7 hours, making it an excellent choice for prolonged muscle recovery, especially overnight or between meals. This feature makes the product useful for those seeking to maintain muscle mass and avoid muscle breakdown throughout the day. Whey protein isolate is one of the cleanest forms of whey available, rapidly digested and absorbed by the body, which supports immediate post-workout recovery. Additionally, whey protein hydrolysate is pre-digested, allowing for even faster absorption, making it a great inclusion for those looking for a protein that is gentle on digestion and efficient for quick muscle repair directly after a workout. Lastly, egg white protein provides another slower-digesting, highly bioavailable source of protein, rich in essential amino acids, making it an effective option for promoting lean muscle growth.

In terms of added ingredients, there are both pros and cons. The inclusion of a creamer blend with sunflower oil, maltodextrin, and sodium caseinate adds a bit of creaminess to the shake, enhancing texture, but for those trying to avoid processed oils and carbs, this may be seen as a drawback. The product does also include sunflower lecithin, which aids in mixability, ensuring a smooth shake, which is helpful for a better drinking experience.

However, it's worth noting the presence of artificial sweeteners like sucralose and acesulfame potassium. While these are commonly used in many protein powders to keep the product low in calories, some may prefer to avoid them due to potential digestive sensitivities or a desire for more natural ingredients. Additionally, carrageenan, found in the gum blend, has been a topic of debate for its potential inflammatory properties, so those with digestive sensitivities might wish to be cautious.

Despite these inclusions, the absence of digestive enzymes, which could aid in better protein utilization and gut health, is somewhat disappointing.

Overall, the ingredient list reflects a product that is primarily designed for muscle recovery and maintenance, with a well-thought-out blend of fast- and slow-digesting proteins.

Reviewed Product
 Sustained Protein Blend
Reviewed Flavor
Chocolate Milkshake
Product Ingredients
Sustained Protein Blend (Native Micellar Casein, Native Whey Protein Isolate, Whey Protein Hydrolysate, Egg White Protein), Cocoa (Processed with Alkali) , Natural and Artificial Flavors, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sunflower Lecithin, Creamer (Sunflower Oil, Maltodextrin, Sodium Caseinate (a Milk Derivative), Natural Tocopherols, Tricalcium Phosphate), Sucralose, Acesulfamate Potassium, Acesulfame Potassium, Salt Contains egg and milk.
Label Endorsed As
Allergens
Milk, Eggs

Effectiveness

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The GNC AMP Sustained Protein Blend is designed to provide continuous muscle recovery through its combination of fast and slow-digesting proteins. This blend is well-suited for individuals looking for sustained amino acid release, making it effective not only post-workout but also as a meal replacement or pre-bedtime option.

Digestion

The core of its effectiveness lies in its protein blend, which combines four types of proteins: native micellar casein, whey protein isolate, whey protein hydrolysate, and egg white protein. Each of these proteins has a different digestion speed, contributing to both immediate recovery and longer-term muscle maintenance. Whey protein isolate and hydrolysate are absorbed quickly by the body, offering a rapid source of amino acids, making them ideal for post-workout consumption when the body is most in need of protein for muscle repair. Micellar casein, on the other hand, is a slow-digesting protein that continues to release amino acids over several hours, ensuring that muscle breakdown is minimized during periods of fasting, such as overnight. This makes the product a versatile option for athletes looking to prevent catabolism while sleeping or in between meals.

Each serving delivers 25g of protein, which is a robust amount for supporting muscle growth and recovery, especially for those aiming to build or maintain muscle mass. The complete amino acid profile provided by the mix of whey, casein, and egg white proteins ensures that the body gets all the essential amino acids needed for muscle protein synthesis. This is particularly beneficial for those following high-intensity workout programs or endurance athletes who require continuous muscle repair.

From a macronutrient perspective, the product’s relatively low carbohydrate content (4g per serving) and fat content (1.5g per serving) make it suitable for a range of dietary goals, including those on low-carb or calorie-restricted diets. This nutritional profile keeps it in the "lean protein" category, which is ideal for those aiming to increase protein intake without adding extra calories from carbs or fats. The 1g of sugar per serving is also quite low, further supporting its effectiveness for individuals looking to limit sugar intake.

However, while the product excels in its core purpose of providing sustained muscle recovery, it lacks some additional components that could further enhance its effectiveness. The absence of digestive enzymes, for instance, might affect the ease of digestion for those with sensitive stomachs, particularly when consuming a blend with casein, which can be harder to digest for some individuals.

Overall, the product achieves its intended goals of supporting muscle recovery through a varied release of amino acids and a complete protein profile. It’s particularly effective for athletes looking for a versatile protein that works throughout the day and night.

Taste

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The Chocolate Milkshake flavor of GNC AMP Sustained should be a welcome choice for those who enjoy a classic chocolate flavor but we have seen mixed reviews when it comes to this flavor. The richness of the chocolate is notable, and while it does have the typical strong sweetness you'd expect from a milkshake-inspired protein, it’s not too overpowering. The chocolate itself comes across as a smooth, deep cocoa flavor, closer to dark chocolate rather than a milk chocolate. That said, the sucralose and acesulfame potassium do leave a subtle artificial aftertaste, but it’s not overwhelming enough to detract too much from the overall experience.

In terms of texture, when mixed with water, the shake maintains a relatively smooth consistency, though it tends to be on the thinner side which was unexpected. If you’re someone who prefers a thicker shake, mixing it with milk significantly improves the mouthfeel, giving it a creamier, more indulgent texture—closer to a real milkshake. Even with the creamer blend added to the formula, water alone doesn't fully achieve the same richness as milk, which is something to consider depending on your dietary preferences.

As for mixability, we found the powder dissolves easily with both water and milk, with minimal clumping. Given that it contains micellar casein, we were pleasantly surprised by how easily it mixed compared to other casein-inclusive powders, which can sometimes form thicker clumps. The sunflower lecithin included in the formula seems to do a good job of ensuring smooth mixing.

Value

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When evaluating the value of GNC AMP Sustained, its price positions it in the mid-range category of protein powders. This positions it slightly above budget options but below the higher-end, premium proteins that you would expect to contain additional supplements like digestive enzymes or probiotics.

Relative Cost
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The product offers 25g of protein per 35g scoop, a decent protein-per-serving ratio, especially considering the blend of fast- and slow-digesting proteins. The inclusion of whey protein isolate and hydrolysate adds value because these are high-quality protein sources that are rapidly absorbed and easy on the digestive system. Additionally, the micellar casein provides sustained release, making the product more versatile. This blend of fast- and slow-digesting proteins increases the overall effectiveness of the product for a variety of goals, providing a good balance for those who want consistent muscle support throughout the day.

However, some considerations may affect its perceived value for certain consumers. The inclusion of artificial sweeteners like sucralose and acesulfame potassium, while standard for many protein powders, might deter those seeking more natural ingredients. Additionally, the creamer blend with sunflower oil and maltodextrin adds some processed elements, which may be a downside for those focused on clean eating. If the product had incorporated more natural sweeteners or omitted some of the artificial additives, it might be viewed as offering greater value to health-conscious consumers.

Overall, the GNC AMP Sustained Protein Blend strikes a good balance between quality and cost. It provides a solid protein source at a reasonable price, especially considering the use of micellar casein and whey hydrolysate, both of which are more expensive protein forms. While not a luxury or premium product, it delivers enough in terms of ingredient quality and protein content to justify its price, making it a strong mid-range option in the protein powder market.

Conclusion

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GNC AMP Sustained Protein Blend is a solid mid-range option for those seeking a versatile protein powder that supports both immediate recovery and long-term muscle repair. Its combination of whey isolate, whey hydrolysate, micellar casein, and egg white protein ensures that users benefit from both fast- and slow-digesting proteins. This makes it ideal for post-workout use and as a meal replacement throughout the day. While it lacks some premium features like digestive enzymes, the core ingredients still provide significant value, especially for athletes needing sustained muscle recovery.

Compared to competitors, it stands out with its blend of proteins at a reasonable price point, though some might prefer alternatives with fewer artificial ingredients or added digestive aids. For those looking for a protein powder that offers a good balance between effectiveness, mixability, and value, the GNC AMP Sustained Protein Blend is a competitive option worth considering. It’s particularly suitable for those who value sustained-release proteins but don’t require extra additives like digestive enzymes or natural sweeteners.

GMC AMP Sustained Protein Blend

Where to buy?

We recommend Amazon, as they consistently provide the best prices and quickest shipping.

Buy on Amazon
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