NutraBio 100% Whey Protein Isolate: The Industry Standard for Clean, Fully Transparent Protein NutraBio 100% Whey Protein Isolate is the flagship protein powder from one of the most trusted, transparency-first supplement brands in the industry — and for good reason. Each scoop delivers 25 grams of pure, non-denatured whey protein isolate from a single protein source (WPI90, 28.74g per serving), with 110 calories, 0g fat, and 1g carbohydrate—no whey concentrate. No maltodextrin. No dextrose. No amino spiking. No fillers. No excipients. No proprietary blends. Nothing hidden. Every batch is independently third-party tested and verifiable via CheckMySupps.com using the lot number on your tub — a level of accountability that most protein brands do not offer and cannot match. NutraBio Whey Protein Isolate holds a perfect 1.0 PDCAAS score, a biological value of 159, and a protein digestibility of 95 — the highest measurable marks across every key protein quality metric. Available in a wide lineup of award-winning flavors, this is the protein that serious athletes — and anyone who cares about exactly what's in their supplement — buy and never leave. At a Glance Serving size: 1 scoop (30g) Protein source: 100% Whey Protein Isolate (WPI90) — 28.74g per serving Protein per serving: 25g Calories: 110 | Fat: 0g | Carbohydrates: 1g BCAAs: 5g+ per serving | Glutamine Precursors: 4g per serving Sodium: ~95mg | Calcium: 132mg (13% DV) | Potassium: 160mg No whey concentrate, no maltodextrin, no dextrose, no creamers No amino or nitrogen spiking — no added glycine, taurine, or creatine to artificially inflate protein readings No soy, no gluten, non-GMO, BSE/TSE free Third-party tested — verify your specific tub at CheckMySupps.com Available sizes: 2 lb, 5 lb Award-winning flavors, including Alpine Vanilla, Dutch Chocolate, Strawberry Shortcake, Blueberry Muffin, Cinnamon Sugar Donut, Vanilla Caramel, and Unflavored What Is WPI90 — And Why It Matters WPI90 refers to whey protein isolate that is at least 90% pure protein by dry weight — the highest purity grade of whey commercially available. NutraBio uses cross-flow ultrafiltration to produce their WPI90, a cold-processing method that removes fats, lactose, and impurities without denaturing (heat-damaging) the protein's native structure and bioactive fractions. The result is a protein that is not only higher in protein density per gram but also retains naturally occurring bioactive compounds like glycomacropeptides (GMP) — approximately 18% of the protein content — that support gut health and immune function. Critically, NutraBio specifically avoids ion-exchange whey isolate and acid-treated whey — two processing methods that strip these bioactive fractions in exchange for slightly higher protein percentages on paper. NutraBio's cross-flow process preserves the full biological integrity of the protein, which is why their WPI90 scores at the absolute top of every standardized protein quality metric: a perfect 1.0 PDCAAS, BV of 159, protein efficiency ratio of 3.6, net protein utilization of 92, and protein digestibility of 95. Protein Quality Metrics — Fully Disclosed NutraBio is one of the few protein brands to disclose the full suite of standardized protein quality measurements publicly. Most brands print "25g protein" on the label and stop there — NutraBio goes further: Metric NutraBio WPI90 What It Measures PDCAAS (Protein Digestibility Corrected Amino Acid Score) 1.0 (Perfect) Amino acid completeness vs. human requirements, corrected for digestibility. 1.0 is the maximum possible score. Biological Value (BV) 159 How efficiently the body retains absorbed protein nitrogen. Higher = more efficiently used. Protein Digestibility 95 Percentage of consumed protein actually absorbed and utilized. Protein Efficiency Ratio (PER) 3.6 Weight gain per gram of protein consumed in standardized growth studies. Net Protein Utilization (NPU) 92 Percentage of dietary nitrogen retained in the body relative to total intake. These are the numbers that matter beyond the label — and NutraBio publishes them while most competitors do not. What "No Amino Spiking" Actually Means Amino spiking (also called nitrogen spiking or protein spiking) is a widespread practice in the supplement industry where manufacturers add cheap free-form amino acids — most commonly glycine, taurine, creatine, or L-glutamine — to their protein powders. Because standard protein testing measures total nitrogen content rather than protein-specific amino acid chains, these added free-form aminos inflate the apparent protein reading on the label without contributing to actual muscle-building protein content. A product claiming 25g of protein may actually contain 18g of real whey protein and 7g of cheap amino acids that were never part of the whey. NutraBio has tested and certified that their Whey Protein Isolate contains zero amino or nitrogen spiking — every gram of protein on the label comes from actual whey protein isolate, with no free-form aminos added to inflate the number. This is independently verifiable via the third-party Certificate of Analysis available on CheckMySupps.com for every production lot. Nutrition Facts Nutrition Facts Serving Size: 1 Scoop (30g) Nutrient Amount Per Serving % Daily Value Calories 110 Total Fat 0g 0% Saturated Fat 0g 0% Trans Fat 0g Cholesterol 3mg 1% Sodium 95mg 4% Total Carbohydrate 1g 0% Dietary Fiber 0g 0% Total Sugars 0g Added Sugars 0g 0% Protein 25g 50% Calcium 132mg 13% Potassium 160mg 3% * Percent Daily Values based on a 2,000-calorie diet. Values reflect unflavored/standard flavors. Sodium may vary slightly by flavor. Confirm exact values against the current product label before publishing. Key Amino Acids Per Serving (Derived from WPI90 — Not Spiked) Total BCAAs: 5g+ per serving Leucine: ~2.7g (primary trigger for muscle protein synthesis) Isoleucine: ~1.4g Valine: ~1.3g Glutamine Precursors: 4g per serving Full essential and non-essential amino acid spectrum — complete protein Ingredients & Other Ingredients NutraBio Whey Protein Isolate uses the shortest possible ingredient list — single protein source plus a minimal flavoring system with no unnecessary additives: Whey Protein Isolate (WPI90) — 28.74g per serving: 100% cross-flow ultrafiltered, non-denatured whey protein isolate. Single source — no whey concentrate blended in. Naturally lactose-reduced (
