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The Protein Review

We Compared 5 Whey Proteins—Here’s What Actually Stands Out (and What’s Overpriced)

Words by Dr Max
Published on September 3, 2026
Six whey protein products and prepared samples compared side by side, with Xwerks Grow first

Whey protein should make it easier to hit your daily protein target. It should not force you to choose between clean sourcing, lean macros and a shake you can actually use every day.

So we compared five of the most talked-about premium whey proteins of 2026. We looked past front-label hype and focused on the type of whey, protein-to-calorie ratio, sourcing, ingredient list, testing transparency, digestive fit and real cost per serving.

All five made a reasonable case. But one delivered the strongest total package: Xwerks Grow.

Our Top Pick: The Best Whey Protein Overall

Xwerks Grow New Zealand grass-fed whey protein isolate bag

Xwerks Grow

Editorial score
4.8/5
★★★★★
Shop Xwerks Grow

30 servings · 30-day money-back guarantee

Other Brands We Compared

Transparent Labs Grass-Fed Whey Protein Isolate

Transparent Labs

4.6/5
Legion Whey Plus grass-fed whey isolate

Legion Whey+

4.5/5
Momentous Whey Protein Isolate

Momentous

4.4/5
Naked Whey grass-fed whey protein

Naked Whey

4.3/5

How We Ranked Each Brand

To keep the comparison consistent, every product was scored against the same five questions:

  • Protein quality: Is the formula a pure isolate, a concentrate or a blend—and how much protein do you get per calorie?
  • Sourcing: Does the brand clearly explain where the dairy comes from and how the whey is processed?
  • Ingredients: Is the label focused, or padded with extra sugar, fillers, dyes and artificial sweeteners?
  • Digestive fit: How much lactose, carbohydrate and fat remain after processing?
  • Usability and value: Do serving count, flavor choice, testing and price make sense for everyday use?
Assorted protein powders and measured scoops used for a side-by-side comparison Label review · source check · value comparison

Top 5 Whey Protein Powders of 2026

  1. Xwerks Grow
  2. Transparent Labs Grass-Fed Whey Protein Isolate
  3. Legion Whey+
  4. Momentous Whey Protein Isolate
  5. Naked Whey

#1 Best Whey Protein Overall: Xwerks Grow

Best overall · 4.8/5 Xwerks Grow whey protein isolate bag

Pros:

  • 25g protein and more than 6g BCAAs per standard serving
  • 100% whey protein isolate—never blended with concentrate
  • Grass-fed, pasture-raised New Zealand dairy
  • Cold microfiltered with virtually zero lactose
  • 110 calories, 0g added sugar and a short ingredient list
  • Third-party testing results linked from the product page

Cons:

  • Premium $69 price is higher than mass-market whey
  • Four flavors is a smaller lineup than Transparent Labs or Legion
  • Peanut Butter provides 23g protein; Strawberry contains some artificial flavoring

Price:

$69 one-time or $65.55 with Subscribe & Save at time of review.

What Stood Out:

Grow earned first place because it is the most complete all-around option. It delivers a full 25 grams of protein in roughly 110 calories, uses pure isolate instead of an isolate-concentrate blend and clearly identifies its source: grass-fed dairy from New Zealand.

That combination matters. Cold microfiltration removes most lactose, carbohydrate and fat while preserving a lean amino-acid-rich protein. The standard serving provides more than 6 grams of BCAAs, including 2.7 grams of leucine, with no added sugar.

Grow also avoids soy and gluten ingredients and publishes third-party test results. It is still a milk product, so it is not appropriate for someone with a milk-protein allergy, but the very low lactose content makes it a more practical option for many people who struggle with whey concentrate.

What To Know:

The biggest tradeoff is price. Grow costs more than commodity whey, and shoppers who only care about the largest protein number per scoop may lean toward Transparent Labs. But when sourcing, filtration, macros, ingredient simplicity and serving count are weighed together, Grow gives up the least.

Try Xwerks Grow

30-day money-back guarantee · Third-party tested

#2 Best High-Protein Scoop: Transparent Labs

Transparent Labs Grass-Fed Whey Protein Isolate container

Pros:

  • 28g of whey protein isolate per scoop
  • Grass-fed dairy with no artificial sweeteners or food dyes
  • Third-party test results available to shoppers
  • 30 servings and a very large flavor selection

Cons:

  • Calories range from 120–150 depending on flavor
  • Source origin is less specific than Grow’s New Zealand sourcing
  • Twenty-four flavors make label-by-label comparison important

Price:

$64.99 for a 2-pound container at time of review.

What Stood Out:

Transparent Labs has the biggest protein number in this comparison: 28 grams per scoop. It uses grass-fed whey isolate, avoids artificial sweeteners, colors and preservatives, and makes testing documents available. With 24 listed flavors, it is also the easy choice for someone who gets bored quickly.

Why It Finished Second:

The formula is excellent, but the calorie and macro profile varies more across flavors. Our scoring also rewards clear source specificity, and “grass-fed cattle” provides less origin detail than Grow’s New Zealand supply or Legion’s third-party-certified Irish sourcing. If maximum protein per scoop is your only priority, Transparent Labs may be your personal #1.

#3 Best Certified Grass-Fed Sourcing: Legion Whey+

Legion Whey Plus grass-fed whey protein isolate bag

Pros:

  • Truly Grass Fed™ certified whey isolate from Ireland
  • 22g protein, 12g EAAs and 5.6g BCAAs per serving
  • Cold-filtered and virtually free of lactose
  • No added sugar, soy, gluten or artificial sweeteners
  • Third-party tested and Labdoor™ certified

Cons:

  • Only 22g protein at the same one-time price as Transparent Labs
  • Some flavors use several different natural sweeteners
  • Lower protein density than the top two picks

Price:

$64.99 one-time; the site listed a discounted first subscription order at time of review.

What Stood Out:

Legion offers the most clearly certified sourcing story of the group. Its Irish dairy comes from Truly Grass Fed™ farms where cows maintain a diet of at least 95% grass and spend at least 250 days per year on pasture, according to Legion. That claim is verified by third-party inspectors.

Why It Finished Third:

The tradeoff is simple: 22 grams of protein is less than Grow’s 25 grams and Transparent Labs’ 28 grams. Whey+ remains a strong premium isolate, especially for shoppers who rank third-party grass-fed certification above protein density.

#4 Best for Tested Sport: Momentous Whey Protein Isolate

Momentous Whey Protein Isolate container

Pros:

  • NSF Certified for Sport®
  • 20g European grass-fed whey isolate in 90 calories
  • Includes ProHydrolase® digestive enzymes
  • No gums, fillers or artificial sweeteners
  • Unflavored option has an especially short formula

Cons:

  • Lowest protein serving in the top five
  • Only 25 servings per container
  • Higher cost per gram of protein than several rivals

Price:

$59.99 one-time for 25 servings at time of review.

What Stood Out:

Momentous is the easiest recommendation here for a drug-tested athlete who wants NSF Certified for Sport. Its formula uses European grass-fed isolate, includes ProHydrolase digestive enzymes and keeps flavored versions free of gums and artificial sweeteners.

Why It Finished Fourth:

The quality story is strong, but the serving delivers only 20 grams of protein and each container has 25 servings. That makes Momentous harder to justify on protein delivery and value, even though its certification and ingredient discipline are excellent.

#5 Best One-Ingredient Concentrate: Naked Whey

Naked Whey unflavored grass-fed whey protein container

Pros:

  • Unflavored version contains one ingredient
  • 25g protein and 5.9g BCAAs per serving
  • Grass-fed dairy sourced from small non-GMO farms
  • Cold-processed without acid or bleach
  • NSF contents certification

Cons:

  • Uses whey concentrate rather than whey isolate
  • Contains more natural milk sugar than the leading isolates
  • Unflavored concentrate is less convenient for taste-first shoppers

Price:

$62.99 one-time for the 2-pound, 30-serving size at time of review.

What Stood Out:

Naked Whey proves a label can be extremely simple. The unflavored formula is just grass-fed whey concentrate, with 25 grams of protein and 5.9 grams of BCAAs per serving. The product is cold-processed and NSF contents certified.

Why It Finished Fifth:

Concentrate is not automatically bad, but it preserves more lactose and milk components than isolate. That makes Naked Whey less aligned with a ranking that gives meaningful weight to protein density and digestive fit. Shoppers who value a one-ingredient powder above everything else may still prefer it.

All Five Are Credible. Grow Is the Best All-Around Pick.

Transparent Labs wins on maximum protein per scoop. Legion wins on certified grass-fed sourcing. Momentous is built for tested sport, and Naked Whey keeps its unflavored formula radically simple. But Grow combines the fewest compromises: 25g protein, lean macros, pure isolate, New Zealand grass-fed sourcing, cold microfiltration and 30 servings.

Shop Our #1 Pick

Sources and review notes

  1. Xwerks Grow official product page.
  2. Men’s Journal: Best Protein Powders.
  3. Transparent Labs Grass-Fed Whey Protein Isolate official page.
  4. Legion Whey+ official page.
  5. Momentous Whey Protein Isolate official page.
  6. Naked Whey official page.

Product information and pricing were checked September 3, 2026. Nutrition varies by flavor. Confirm current ingredients, allergens, nutrition facts, pricing and availability on the label and official product page. This article is for general information and is not medical advice.