Type of Whey Protein
Whey protein comes in three main types: whey concentrate, whey isolate, and hydrolyzed whey. All three provide high-quality protein, but differ in how they’re processed and who they may be best suited for:
Whey protein concentrate is the least processed. It has a creamier texture and naturally contains more lactose, fat, and carbohydrates. Most concentrates are 70 to 85 percent protein and contain up to about 5 percent lactose, depending on the product.Whey protein isolate is filtered more to remove most of the lactose and fat, typically containing 90% or more protein by weight. It’s often a good choice for people with lactose intolerance or those who want a higher protein content with less carbohydrate and fat.Hydrolyzed whey is partially broken down before you drink it, which may make it easier to digest for some people. You'll often find it in sports nutrition and recovery formulas, although it tends to cost more than concentrate or isolate.Protein Per Serving
Most quality whey protein powders provide 20 to 30 grams of protein per serving, but that only tells part of the story.
Take a look at the full Nutrition Facts panel. Two protein powders may provide 25 grams of protein, but one may contain more carbohydrates or fat. Sometimes those additions are intentional—such as fiber and medium-chain triglycerides (MCTs)—to enhance satiety and improve mixability. Other times, a leaner formula may be a better fit. Choose the one that best aligns with your nutrition goals.
Third-Party Testing
Dietary supplements aren't tightly regulated by the U.S. Food and Drug Administration. Third-party testing provides an extra layer of confidence that a product contains what the label claims and has been screened for contaminants.
For example, NSF Certified for Sport and Informed Sport are among the most trusted third-party certifications for athletes. Both verify product quality and test for substances banned in sport. Informed Choice also screens for banned substances, though Informed Sport has more extensive testing requirements.
Flavor + Mixability
It’s important to choose a flavor you’ll enjoy, but to also think about how you’ll realistically use it day to day. Vanilla and unflavored options are versatile if you like adding protein powder to smoothies, oatmeal, coffee, or baked goods, while adventurous flavors are often better suited for shakes with water or milk.
A good whey protein should also blend smoothly in a shaker bottle—you shouldn’t have to reach for the blender every time you want a lump-free shake. Powders that dissolve easily are more convenient, whether you’re making a quick breakfast, refueling after a workout, or mixing a shake on the go.
