The Best 10 Unflavored Protein Powders, RD-Approved

Calories per serving: 120 | Protein per serving: 25 grams | Protein source: Grass-fed whey 

Meet Naked Nutrition: proof that less really is more. Each tub of this unflavored protein powder contains literally just one thing — whey protein concentrate from organically raised, grass-fed cows. If you’re looking for a product that’s environmentally friendly and has zero additives or sugars, this one fits the bill (and does so at a fairly affordable price point). 

For transparency and health, it gets my vote for the best unflavored protein powder overall. It’s only downside? After using it for months, I’ve found that Naked doesn’t mix quite as well as some other protein powders I’ve tried. Stubborn, tough-to-blend clumps mean this one doesn’t always go down smoothly.

Calories per serving: 100 | Protein per serving: 25 grams | Protein source: Whey protein isolate

The best part about Isopure’s Zero Carb Protein Powder is that each serving of this unflavored whey protein isolate comes in at the budget-friendly price of just $1.75. True to its name, this powder is carb-free, and it also has near-zero lactose (making it a good choice for anyone with lactose intolerance). And since lactose is a carbohydrate, removing it also means lowering carb count. 

If you can’t tolerate soy, you’ll want to steer clear of this choice, though, since it uses soy lecithin for texture. Some users also say the packaging is difficult to re-close, so just make sure to seal it carefully. 

Calories per serving: 85 | Protein per serving: 20 grams | Protein source: Whey protein isolate 

Plenty of protein for minimal calories? Sign me up! One serving of Klean Athlete’s Klean Isolate Powder supplies 20 grams of protein for the approximate calorie equivalent of a jumbo egg (85 calories). And you won’t find any funky colorings or sweeteners here. The only other ingredient besides whey protein isolate is sunflower lecithin, a low-calorie emulsifier. 

But while this powder is low-calorie, it isn’t low-cost. Each serving will cost you approximately $3.40 — double the price of some of the other options on this list. But if you’re willing to shell out a little more for a flavorless powder that supplies a complete amino acid profile and mixes well (despite a little frothing), this one’s a best bet. 

Calories per serving: 130 | Protein per serving: 20 grams | Protein source: Pea, pumpkin, and chia protein 

It’s not always easy to find a vegan powder that supplies as much protein as animal varieties. That’s why I was excited to discover Truvani’s unflavored vegan powder, which provides 20 grams of protein. Unlike many heavily processed plant-based powders, this one contains just five ingredients — all of which are recognizable and pronounceable. 

Truvani’s Pea Protein also supplies all nine essential amino acids, while a bump of 2 grams of fiber adds to its profile of health benefits. Just note that this one is rather high in sodium at 12 percent of the Daily Value per serving. If you need to limit your sodium intake, you may want to consider another option on our list.

Calories per serving: 110 | Protein per serving: 25 grams | Protein source: Whey protein isolate 

Now Sports’ Whey Protein Isolate does the job of revving up your protein intake with a simple, two-ingredient formula. Although it’s a no-frills approach, that doesn’t mean this powder isn’t of high quality. The brand’s products undergo third-party testing to ensure their purity and efficacy. 

Since this whey protein isolate is available in sizes ranging from 1.2 pounds to a gargantuan 10 pounds, you’re sure to find a canister that suits your needs. Try it as a flavorless 25-gram upgrade for baked goods, fruit smoothies, or even creamy soups. However, keep in mind that some reviewers found an unpleasant aftertaste. 

Calories per serving: 140 | Protein per serving: 21 grams | Protein source: Pea, brown rice, and chia seed powder 

Though it boasts protein from peas, brown rice, and chia seeds, Orgain’s Unflavored Plant-Based Protein Powder doesn’t taste like a grain bowl. Instead, an organic creamer base creates a neutral taste that blends beautifully into liquids. We think you’ll be hard-pressed to find a better unflavored option that’s plant-based, vegan, and certified organic.

That said, this vegan powder is on the higher side of the calorie spectrum at 140 calories per serving. Its ingredient list is fairly long, too, including gums and emulsifiers. And though it’s plant-based, it contains less than 1 gram of fiber.

Calories per serving: 120 | Protein per serving: 25 grams | Protein source: Grass-fed whey

Promix’s entirely grass-fed whey protein powders come in six flavor options, but I’m partial to the au natural variety. Though slightly gritty in texture, it’s otherwise an unnoticeable addition to beverages and shakes. Each two-scoop serving (made only with grass-fed whey and sunflower lecithin) loads you up with 25 grams of complete protein. 

Meanwhile, the minimal filtration of whey creates a high concentration of omega-3 fatty acids and conjugated linoleic acid. This adds nutritious fats to its ample protein content. Between its impressive nutrient profile and best practices for cows, it’s a great choice as an unflavored powder.

Calories per serving: 110 | Protein per serving: 21 grams | Protein source: Organic grass-fed whey 

Simply Tera’s Grass-Fed Organic Whey Protein Powder is a winner on multiple fronts. Using organic whey from grass-fed, pasture-raised cows, it prioritizes animal welfare. And with 21 grams of complete protein, a moderate 110 calories, and extremely low sodium, it’s a top dog for nutrition, too. I’m honestly impressed that it has a creamy texture and neutral taste without any added sugars. 

If you order this powder online, just be prepared for its petite size. A canister is only 12 ounces, which equates to just 12 servings. If you like the product (we think you will), you might need to put this one on auto-refill every couple of weeks or so.

Calories per serving: 90 | Protein per serving: 20 grams | Protein source: Grass-fed whey protein isolate 

Most of us don’t supplement with protein powder just for fun. What do we want? Muscle gains! (And when do we want ’em? ASAP!) This powder from Momentous uses whey protein isolate for a product that’s extremely low in lactose and carbs, yet high in complete protein. Since calories are low, it supports muscle growth without adding too many calories to your daily total.  

Another piece of good news: this powder is made with a proprietary blend of digestive enzymes to help ensure smoother digestion. Anyone who’s ever experienced the “protein poops” will be thankful — trust me. 

Calories per serving: 70 | Protein per serving: 18 grams | Protein source: Bovine hide collagen peptides 

Collagen is a sought-after supplement these days, owing to its potential for improving skin hydration and elasticity and promoting nail growth. Anyone pursuing its benefits may find a beauty BFF in Vital Proteins Collagen Peptides Powder. Its unflavored peptides melt away into coffee, tea, or broth (though some say it doesn’t do so well in cold fluids). At just 70 calories per serving, it’s a low-cal approach to the aesthetic benefits of collagen.

I also appreciate that this powder meets an entire day’s vitamin C requirement, and that it’s low in sodium. But it’s not a complete protein, meaning it doesn’t contain all the essential amino acids you need to get from food. And remember that collagen supplements take time to work — try it for three months or longer to see results.