Are both Klean Athlete and Kaged NSF Certified for Sport?

Yes, both brands hold NSF Certified for Sport status on select SKUs. Klean Athlete is NSF Certified for Sport across the entire Klean Isolate line, including all three flavors. Kaged Re-Kaged Whey Protein Isolate and Kaged Whey Protein Isolate carry NSF Certified for Sport on the chocolate and vanilla SKUs. Both are appropriate for athletes competing in tested federations (NFL, MLB, NCAA, IOC).

Which has more protein per scoop?

Kaged has more protein per scoop. Kaged Re-Kaged delivers 28 g protein per 42 g scoop. Klean Isolate delivers 20 g protein per 29 g scoop. Kaged is the higher-density option but with a larger scoop size. If you want the leanest macros (more protein in a smaller scoop), Kaged wins. If you want a smaller-calorie shake, Klean's 20 g serving size works better.

Klean Athlete is slightly cheaper per gram of protein in the smaller 20 oz size at $39.99 ($0.099 per gram). Kaged Whey Isolate 5 lb at $69.99 works out to $0.041 per gram of protein, which is meaningfully cheaper when you buy bulk. For one-tub shoppers, Klean is the lower up-front cost. For daily-use buyers, Kaged's 5 lb tub is the better per-gram value by a wide margin.

Who owns these brands?

Klean Athlete is owned by Douglas Laboratories, a practitioner-grade supplement company that has been making professional-grade products since 1955. The Klean Athlete sub-brand launched in 2010 specifically for the athletic and Olympian market. Kaged was founded in 2017 by veteran bodybuilder Kris Gethin and acquired by Glanbia Performance Nutrition (parent of Optimum Nutrition) in 2023. Both brands are professionally backed but with different positioning.

Which one tastes better?

Kaged tastes better. The Chocolate and Vanilla variants are sweetened with monk fruit and stevia and deliver a more mainstream-shake palatability. Klean Isolate is intentionally minimally flavored with natural cocoa and natural strawberry, which can read as 'medicinal' to shoppers coming from a sucralose-sweetened mainstream whey. Klean is the cleaner-flavored, less sweet option; Kaged is the easier daily drinker.

Where can I buy these brands?

Klean Athlete sells primarily through kleanathlete.com, GNC, Vitamin Shoppe and limited Amazon listings. Kaged is at GNC, Bodybuilding.com, Amazon, Walmart, iHerb, plus the kaged.com direct site. Kaged has wider mainstream distribution; Klean is more available through practitioner and natural-products channels. For Costco shoppers, neither brand is currently a Costco staple.

Klean Athlete vs Kaged

Two premium NSF Certified for Sport whey brands serving the same athlete-grade certification niche, but with completely different formulations. Klean's Douglas Labs medical-grade pedigree vs Kaged's hybrid-athlete cold-microfiltered approach. We tracked every retailer to see which one fits your training.

Brand overview: Klean Athlete

Klean Athlete launched in 2010 as the athletic sub-brand of Douglas Laboratories, a practitioner-grade supplement company founded in 1955. The Klean line is built around NSF Certified for Sport status across the entire product range, which makes it appropriate for athletes in tested federations (NFL, MLB, NCAA, NBA, IOC). Klean Isolate uses whey isolate sourced from grass-fed dairy with minimal flavor systems (natural cocoa, natural vanilla, natural strawberry). The brand is positioned as the "doctor's office" pick for clean, certified protein. Klean also makes Klean Plant Protein, BCAA, Creatine and Electrolytes.

Brand overview: Kaged

Kaged was founded in 2017 by Kris Gethin, a veteran competitive bodybuilder turned hybrid-athlete coach. The brand built around the premise that elite supplements should match elite training requirements: cold-microfiltered whey isolate, full ingredient disclosure, NSF Certified for Sport on flagship products, and clinically-dosed pre-workouts. The flagship Re-Kaged Whey uses CarnoSyn beta-alanine as part of the formulation, distinguishing it from generic whey. Kaged was acquired by Glanbia Performance Nutrition in 2023, giving it Optimum Nutrition's manufacturing and distribution backbone while maintaining the premium positioning.

Side-by-side: flagship products

Metric	Klean Isolate (20 oz)	Kaged Re-Kaged Whey (1.85 lb)
Tub size	595 g / 20 oz	840 g / 1.85 lb
Servings per tub	20	20
Protein per serving	20 g	28 g
Serving size	29 g	42 g
Total protein in tub	400 g	560 g
NSF Certified for Sport	Yes	Yes
Whey source	Grass-fed whey isolate	Cold-microfiltered whey isolate
Added ingredients	Minimal: cocoa, stevia, natural flavor	CarnoSyn beta-alanine, ProHydrolase
Lowest tracked price	$39.99 (Klean direct)	$49.99 (Amazon)
Cost per gram of protein	$0.100	$0.089
Flavors tracked	Chocolate, Vanilla, Strawberry	Chocolate, Vanilla, Plus Iso Variants

Bulk option: Kaged 5 lb changes the math

If you compare Klean Isolate 20 oz to Kaged Whey Protein Isolate 5 lb (Kaged's separate bulk SKU), the per-gram economics shift dramatically. Kaged Whey Isolate 5 lb at $69.99 delivers 25 g protein per 30 g scoop, $0.041 per gram. That makes Kaged Whey Isolate one of the cheapest NSF Certified for Sport options we track. Klean does not offer a 5 lb bulk size; the 20 oz format is the largest size available.

For NSF Certified athletes who want maximum protein per dollar, Kaged Whey Isolate 5 lb is the spreadsheet winner by a wide margin. For shoppers who specifically want medical-grade pedigree, Klean's Douglas Laboratories backing is a meaningful pull even at higher per-gram cost.

Flavor and clean-label palatability

Klean Isolate is intentionally minimally flavored. The Chocolate Milkshake variant uses natural cocoa and stevia; Natural Vanilla uses real vanilla and stevia; Natural Strawberry uses freeze-dried strawberry and stevia. The flavor experience is closer to a homemade smoothie than a supplement-style shake. Mainstream-whey drinkers often describe Klean as tasting "thin" or "underseasoned" on first try. Acquired-taste users tend to love the clean profile.

Kaged Chocolate and Vanilla use monk fruit and stevia for sweetness with a slightly more aggressive flavor system. The result is mainstream-shake palatable while staying clean-label. Kaged drinks more like a "normal" whey shake without the sucralose finish. For first-time clean-label converts, Kaged is the easier adjustment.

Winner by goal

Best for tested athletes

Klean Athlete Klean Isolate Chocolate

NSF Certified for Sport across every batch, sourced from Douglas Labs medical-grade manufacturing. The most credentialed pick.

Best value certified whey

Kaged Whey Protein Isolate 5 lb

$69.99 for 5 lb at $0.041 per gram of NSF Certified protein. Best bulk value in the certified category.

Best clean-label macros

Klean Athlete Klean Isolate Vanilla

Minimal ingredient list (whey isolate, natural vanilla, stevia). The cleanest macro per scoop in the matchup.

Best for training stack

Kaged Re-Kaged Whey Chocolate

CarnoSyn beta-alanine and ProHydrolase enzyme blend built into the formula. Useful for shoppers stacking pre-workout and protein.

Best plant-based crossover

Klean Athlete Klean Plant Protein Chocolate

19 g pea + rice protein, NSF Certified for Sport. The plant alternative for athletes who need certification.

Best for cutting

Kaged Whey Protein Isolate 3 lb Vanilla

25 g protein, 1 g fat, 1 g carb per 30 g scoop. Leanest macros for cutters who want NSF certification.

Which one should you buy?

If you compete in a tested federation that requires NSF Certified for Sport, you want medical-grade manufacturing pedigree, and you prefer a clean, minimally-flavored shake, buy Klean Athlete Klean Isolate Chocolate 20 oz. The Douglas Labs backing and across-the-board NSF certification make it the pick that no team doctor would question.

If you want NSF Certified protein at the best per-gram price, you prefer mainstream-shake palatability, and you can use a 5 lb bulk tub, buy Kaged Whey Protein Isolate 5 lb Chocolate. The math works out cheaper than Klean by a wide margin while still satisfying tested-federation requirements.

If you cannot decide: Kaged Whey Isolate 5 lb covers most daily training needs. Pick up a 20 oz Klean Isolate if you want to test the minimal-flavor experience or need a smaller backup tub for travel. Combined cost about $110 covers 100+ servings of NSF Certified protein.

Common questions about Klean Athlete vs Kaged

How rigorous is NSF Certified for Sport?

NSF Certified for Sport is the strictest banned-substance testing program for sports supplements in North America. Each batch of certified product is tested for over 280 banned substances on the WADA/IOC/NFL/NCAA prohibited list, plus contaminants and label-claim verification. The certification renews every batch, not just every formula. Both Klean and Kaged maintain ongoing NSF certification, so any tub you buy at retail with the NSF Certified for Sport stamp has been independently verified.

Is the CarnoSyn beta-alanine in Re-Kaged useful?

The Re-Kaged formula includes 1.5 g of CarnoSyn beta-alanine per scoop, well below the 3.2-6.4 g daily dose that has been studied for performance enhancement. This is essentially a "marketing dose" rather than a clinical dose. If you want beta-alanine for performance, supplement separately with a dedicated beta-alanine product at the studied dose.

Are these brands grass-fed?

Klean Isolate sources from grass-fed dairy. Kaged uses cold-microfiltered whey but does not specifically claim grass-fed status on its main lineup. For grass-fed plus NSF Certified, Klean is the cleaner credential. For pure NSF certification, both qualify.

Why is Klean Athlete sold at Vitamin Shoppe and not Walmart?

Klean Athlete is positioned as a practitioner-grade brand sold through clinicians, naturopaths, and athletic trainers as well as retail. Vitamin Shoppe and GNC fit the brand's clinical positioning; Walmart does not. The narrower distribution is intentional and helps maintain the brand's medical-pedigree premium.

Has Kaged changed since the Glanbia acquisition?

The 2023 Glanbia acquisition has not changed Kaged's product formulations as of 2026. The brand continues to use the same cold-microfiltered whey isolate sourcing, the same NSF Certified for Sport status, and the same dosing philosophy. What has changed: Kaged now has access to Glanbia's mass-retail distribution muscle, which has expanded availability at Walmart, Target and Amazon.