Transparent Labs is the clean-isolate standout in this lineup: 28 g of protein per scoop — among the highest protein-by-weight ratios you'll find anywhere — from 100% grass-fed, grass-finished American dairy, with no artificial sweeteners, dyes, gluten or preservatives. If your priority is maximum protein density with a genuinely clean label, this is the top pick on the board. The honest caveats are about cost and verification. You pay a premium per gram — roughly $2.00 a serving, about double our #1 — and the tub is small at 30 servings, so you reorder often. And while the brand states the product is third-party tested, this listing carries no named Informed Sport or NSF seal, so we credit that claim exactly as stated and no further. It's a weaker testing signal than the named certification Legion (#4) carries. For buyers who want the most protein per scoop with the cleanest possible label and will pay for sourcing, Transparent Labs is the clear choice; for value or a verifiable seal, the ranking has better answers.
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Read the complete Protein Powder guide →The highest protein density in the lineup: 28 g per scoop — one of the highest protein-by-weight ratios on the market — from a 100% grass-fed, grass-finished whey isolate, the leanest and highest-purity form of whey. Outstanding on the single most heavily weighted axis.
One of the cleanest labels here: fully disclosed isolate with no proprietary protein blend, no artificial sweeteners, no food dyes, no gluten and no preservatives, sweetened only with stevia at 0 g added sugar. No amino-spiking concern. Excellent on purity and disclosure.
The brand states the product is third-party tested, but this listing carries no named Informed Sport or NSF seal — so we credit the claim exactly as stated and no further. A real but unverifiable-from-the-listing signal, weaker than the named Labdoor + ISO 17025 certification Legion (#4) carries.
The weakest axis. At roughly $2.00 per serving in a small 30-serving tub, it's among the priciest protein-per-gram here — about double commodity whey like Gold Standard. The density and clean sourcing justify a premium, but on pure cost efficiency it loses clearly to the big commodity tubs.
Milk Chocolate is a solid, clean-tasting flavor and the isolate mixes smoothly. Scored a touch below the sucralose-sweetened picks because stevia has a slightly different finish that's a matter of preference — clean and pleasant, just not everyone's favorite sweetener profile.
“28 g of protein per scoop — one of the highest protein-by-weight ratios.”
Stated on the listing and confirmed by WebFetch of the Amazon page during sourcing ("28g of Protein per Serving"). Among the highest protein-by-weight ratios in the category, from a fully disclosed isolate — an accurate, verifiable claim.
“No artificial sweeteners, food dyes, gluten or preservatives.”
The clean-label composition is stated on the listing — stevia-sweetened with 0 g added sugar. Consistent with the product's positioning and one of the cleanest ingredient profiles in this lineup. Accurate as stated.
“Third-party tested for quality and purity.”
Credited exactly as the brand states it. Marked partial because this retail listing carries no named Informed Sport or NSF seal to independently verify the claim, so we report it without upgrading it to a named, listing-level certification.
At 28 g per scoop, Transparent Labs packs more protein per serving than anything else here — ahead of Gold Standard (24 g) and even the dedicated isolate ISO100 (25 g). For buyers maximizing a high daily protein target without extra scoops, carbs or fat, that density is the headline. It's also a 100% grass-fed, grass-finished isolate, so the density comes with leanness and sourcing pedigree rather than filler.
No artificial sweeteners, no dyes, no gluten, no preservatives, stevia-sweetened with 0 g added sugar: this is one of the cleanest ingredient profiles in the ranking. The cost of that clean sourcing is real — about $2.00 per serving in a small 30-serving tub, roughly double commodity whey. The clean label and grass-fed sourcing are the reason to pay it; if neither is a priority for you, the premium is hard to justify on protein alone.
Transparent Labs states the product is third-party tested, and we credit that — but this listing doesn't carry a named Informed Sport or NSF certification, so it's a weaker signal than a verifiable seal. Legion (#4) is the pick if independent, named verification is your priority; it's Labdoor-certified and tested in an ISO 17025 lab. Transparent Labs wins on density and clean sourcing, not on the strength of its testing claim.
Transparent Labs is the top choice for buyers who want the most protein per scoop with the cleanest possible label: 28 g of grass-fed whey isolate, no artificial sweeteners, dyes or gluten. On protein density and ingredient purity — the two heaviest-weighted axes combined — nothing here beats it. If you'll pay a premium for sourcing and want maximum clean protein, this is the pick. It lands at #3 on value and verification. At ~$2.00 a serving in a small 30-serving tub, it's among the priciest protein-per-gram here, and its testing is brand-stated rather than a named seal. Read that distinction honestly: Legion (#4) carries the verifiable certification, and Gold Standard (#1) wins decisively on cost. For density and a clean label, Transparent Labs is the answer; for value or independent verification, look one or two spots up the list.
Check Transparent Labs · 28g grass-fed whey isolate, no artificial sweeteners · 30 servings on AmazonThe value benchmark — 24 g of quality whey at ~$0.95 a serving, roughly half the per-serving cost. Pick this if you want reliable protein at the best price and don't need grass-fed sourcing.
See it on the list →Also grass-fed and naturally sweetened, but with a named, verifiable testing claim — Labdoor-certified in an ISO 17025 lab. Choose this if you want a clean grass-fed isolate AND independent verification.
See it on the list →A pure hydrolyzed isolate at 25 g for ~120 calories — leaner and faster-digesting, if you don't mind sucralose. The dedicated post-workout isolate over the grass-fed angle.
See it on the list →Meta-analysis of 49 studies (1,863 participants): protein supplementation significantly augmented resistance-training gains in muscle mass and strength, plateauing around 1.6 g/kg/day. Context for why a high-density 28 g scoop is useful for hitting an ambitious daily target.
Pooling 22 RCTs, supplemental protein during resistance training significantly increased fat-free mass, fiber cross-sectional area and 1-RM strength. The evidence that a high-quality isolate meaningfully enhances training adaptation when it helps you hit your intake.
Classic nitrogen-balance study estimating strength athletes' recommended intake near 1.76 g/kg/day — roughly double the sedentary RDA. Why a high-protein-density scoop helps trained individuals close a substantial daily gap.
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