Naked Whey vs Onnit: Which Traditional Whey Protein Should You Buy After 40?
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Naked Whey and Onnit Grass Fed Whey Isolate are two of the most “clean label” traditional whey powders we’ve reviewed — both skip artificial sweeteners, both use grass-fed dairy, and both show up often in searches for a simple, no-frills protein powder after 40. Here’s how they actually compare.
Quick verdict
Naked Whey (unflavored) is a whey protein concentrate with exactly one ingredient and zero sweetener of any kind — the cleanest label of the two, and the better value per gram of protein. Onnit is a whey protein isolate sweetened with stevia and monk fruit, which means slightly less lactose and a bit more flavor variety, at a higher cost per gram of protein. If label simplicity and price matter most, Naked Whey wins. If you specifically want an isolate (less lactose, leaner macros) and don’t mind paying more, Onnit is the better fit.
| Factor | Naked Whey | Onnit Grass Fed Whey Isolate |
|---|---|---|
| Form | Whey protein concentrate | Whey protein isolate |
| Ingredients | 1 (grass-fed whey concentrate only, unflavored) | Whey isolate + stevia + monk fruit extract |
| Sweetener | None (unflavored version) | Stevia, monk fruit (natural, no artificial sweeteners) |
| Protein per serving | 25 g | 20 g |
| Price per serving (approx.) | ~$1.84 | ~$2.00 |
| Best for | Simplest possible label, best value per gram of protein | Lower lactose, more flavor options, isolate preference |
Why choose Naked Whey
The unflavored version is genuinely one ingredient — grass-fed whey protein concentrate, nothing else. There’s no sweetener to react to, no flavoring to dislike, and at roughly $0.07 per gram of protein it’s one of the better values among the products we’ve reviewed. The tradeoff is that it’s a concentrate, not an isolate, so it retains slightly more lactose and fat than a true isolate — worth knowing if your stomach is sensitive to dairy. See our full Naked Whey review.
Why choose Onnit
Onnit’s grass-fed whey is a true isolate, which means less lactose and a leaner macro profile than a concentrate — a reasonable upgrade if dairy sensitivity or fat/carb content matters to you. It’s also sweetened naturally (stevia and monk fruit, no artificial sweeteners), so flavored versions are an option without giving up a clean label. It costs more per gram of protein than Naked Whey, which is the main tradeoff. See our full Onnit Whey Isolate review.
Bottom line
Both are legitimately clean-label whey powders with no artificial sweeteners. Pick Naked Whey if you want the absolute simplest ingredient list and the best price per gram of protein. Pick Onnit if you specifically want an isolate for lower lactose and don’t mind paying a bit more per serving.
Sources
- Naked Nutrition and Onnit official product pages — ingredients, pricing, and serving information.
- Pricing checked from official/retailer pages at the time of writing; prices change frequently and may not reflect current promotions.