Quick Picks
Eight products that made our shortlist after filtering across all 12 tracked US retailers. Click any pick to see live prices, all retailers, and the latest deal.
How We Ranked These
Filtered to brands that use stevia, monk fruit, erythritol, or no sweetener at all on their primary flavors. Excluded: any brand whose flagship products use sucralose, aspartame, or acesulfame potassium.
All prices verified within the last 24 hours. We re-check every product across all 12 tracked retailers (Walmart, Amazon, iHerb, GNC, Bodybuilding.com, Target, Vitacost, Muscle & Strength, Costco, Tiger Fitness, MyProtein, Transparent Labs) every two hours. Out-of-stock products are excluded from these rankings entirely.
Our Top Pick
5 lb · 28g protein/scoop · 76 servings
Stevia-sweetened, fully disclosed, grass-fed. The flagship of the no-sucralose movement and consistently rated for taste in independent reviews. The best blend of clean ingredients and palatability. See Transparent Labs price →
Runner-Up
5 lb · 28g protein/scoop · 60 servings
Promix grass-fed whey, monk-fruit sweetened. Cleaner label, slightly higher cost. See Transparent Labs price →
Honorable Mentions
The next picks worth knowing about. Slightly different trade-offs but still in the top tier for this category.
RSP Nutrition Whey Protein Blend. 4 lb, 25g protein/scoop, $47.99 at Walmart.
Legion Athletics Casein+ Micellar Casein. 4 lb, 26g protein/scoop, $54.99 at Amazon.
Ascent Native Fuel Whey. 4 lb, 25g protein/scoop, $54.99 at Amazon.
Ascent Native Fuel Whey Isolate. 4 lb, 25g protein/scoop, $59.99 at Amazon.
See clean-label live pricing
Ascent, Promix, and Legion rotate as the best-priced clean-label whey. Stay on top of current deals.
Browse whey protein →Frequently Asked Questions
The big four: sucralose (Splenda), aspartame (NutraSweet), acesulfame potassium (Ace-K), and saccharin. 'Natural' sweeteners that pass our filter: stevia, monk fruit extract, erythritol, allulose, xylitol, and just-plain-sugar (rare in protein but it counts).
Most studies show sucralose is safe at typical doses. Some users report GI distress (bloating, gas) at higher intake, and a small number of studies suggest sucralose may negatively affect gut microbiome composition. For these users, stevia or monk-fruit blends are the natural pivot.
Stevia has a slight licorice-bitter aftertaste at higher doses. Brands that use it well (Legion, Ascent, Promix) combine stevia with small amounts of erythritol or monk fruit to mask the bitterness. The result is close to sucralose-sweetened but with a slightly drier finish.
Yes. Monk fruit extract is generally recognized as safe by the FDA, has no calories, and shows no negative health effects in clinical studies. It's the most expensive natural sweetener, which is why fewer products use it as their primary sweetener.
Yes. Naked Whey, Naked Casein, Promix Unflavored, and MyProtein Impact Whey Unflavored all skip sweeteners entirely. The downside: they taste like cream-water and need additional flavoring (cocoa powder, fruit, peanut butter) to be palatable.
Generally yes. Brands that skip artificial sweeteners tend to also skip artificial colors, fillers, and emulsifiers. So choosing a 'no artificial sweetener' product usually filters you into a cleaner-label tier overall.
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