Data table
Highest Protein-Density Powders
The powders in this table where protein makes up at least 75% of the serving by weight — a rough purity signal, not a lab assay.
Sorted by proteinPct (protein grams ÷ total serving grams). Ready- to-drink shakes and collagen are excluded from this cut by design — see each row's note.
| whey concentrate/isolate/blend, casein, or plant | 'Informed Choice' = confirmed on that registry's own listing (Informed Sport itself was unreachable, see provenance); 'none found' = not located in either registry search | True if either certifiedNsfSport is true or certifiedInformed is not "none found" | proteinPerServingG ÷ servingSizeG, rounded — a rough purity signal, not a lab assay | True if proteinType is a plant protein (pea, rice, etc.) rather than whey/casein/collagen | Manufacturer-listed price for the container size in basis, at curation time — not a live price feed | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Optimum Nutrition | Gold Standard 100% Whey | whey concentrate/isolate blend | ✓ | Informed Choice (parent company Glanbia's ON line listed) | ✓ | 24 g | 31 g | 77 % | — | $44.99 | $1.1 |
| Optimum Nutrition | Gold Standard 100% Isolate | whey isolate | — | Informed Choice ("ON Isolate (USA)") | ✓ | 25 g | 30 g | 83 % | — | $54.99 | $1.9 |
| Thorne | Whey Protein Isolate | whey isolate | ✓ | none found | ✓ | 21 g | 27 g | 78 % | — | $59 | $2.3 |
| Klean Athlete (Douglas Labs) | Klean Isolate | whey isolate | ✓ | none found | ✓ | 20 g | 26 g | 77 % | — | $54 | $2.7 |
| Momentous | Essential Grass Fed-Whey Protein | whey, grass-fed | ✓ | none found | ✓ | 20 g | 25 g | 80 % | — | $65 | $2.6 |
| Transparent Labs | 100% Grass-Fed Whey Protein Isolate | whey isolate, grass-fed | ✓ | none found (Transparent Labs Mass Gainer, Pump, Collagen, PurCaf found on Informed Choice — not this SKU) | ✓ | 28 g | 34 g | 82 % | — | $64.99 | $2.3 |
| Bare Performance Nutrition | Whey Protein Isolate | whey isolate | ✓ | none found | ✓ | 25 g | 32 g | 78 % | — | $54.99 | $2.2 |
| 1st Phorm | Phormula-1 Clear Protein Powder | whey/collagen hydrolysate (clear, juice-like format) | ✓ | none found | ✓ | 20 g | 24 g | 83 % | — | $59.99 | $2.85 |
| Ladder (LeBron James/Arnold Schwarzenegger brand) | Premium Whey Protein | whey isolate/concentrate blend | ✓ | none found | ✓ | 25 g | 33 g | 76 % | — | $69.99 | $3.5 |
| Dymatize | ISO100 Hydrolyzed Whey Protein Isolate | whey isolate, hydrolyzed | — | Informed Choice ("ISO100 Hydrolyzed Protein Powder (USA)") | ✓ | 25 g | 30 g | 83 % | — | $54.99 | $1.85 |
| GHOST | GHOST Whey Protein | whey concentrate/isolate blend | ✓ | none found | ✓ | 25 g | 33 g | 76 % | — | $49.99 | $2.15 |
| BulkSupplements | Whey Protein Isolate (unflavored) | whey isolate | — | none found | — | 25 g | 32 g | 78 % | — | $32.96 | $0.55 |
| Vital Proteins | Collagen Peptides (unflavored) | collagen (not a complete/muscle-building protein — included for the Amazon best-seller comparison) | — | none found | — | 20 g | 20 g | 100 % | — | $43 | $1.2 |
| Nature's Bounty (Optimum Nutrition's sibling brand under Glanbia — for contrast) | Isopure Zero Carb | whey isolate | — | none found | — | 25 g | 31 g | 81 % | — | $49.99 | $1.65 |