Sports Research® 100% Whey Protein Isolate Dark Chocolate - U.S. Sourced Protein Powder w/BCAAs - No Artificial Flavors or Gums- Informed Sport Tested · Gluten Free - 2lb Bulk Bag, 25 Servings

Clinical trials typically use 20-40g per serving, 1.6-2.2g/kg/day total protein for athletes. Sports Research 100% Whey Protein Isolate Dark Chocolate delivers 25g whey protein isolate + 6.9g BCAAs + 1,000mg L-Leucine per serving, which we classify as Therapeutic relative to that range.

See the "Also consider" section below for two alternatives. Choose based on form preference (Powder vs alternatives), dose adequacy, and third-party testing.

Yes — Informed Sport. Third-party testing verifies ingredient identity and label accuracy.

Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.

Whey protein isolate has no significant interactions with most medications. The trace calcium content may slightly reduce absorption of some antibiotics (quinolones, tetracyclines) if taken simultaneously — a 1-2 hour gap resolves this. Individuals with chronic kidney disease or on dialysis should consult their physician before high-protein supplementation.

Whey protein isolate has an extensive long-term safety record in healthy populations. Clinical research has not identified adverse effects from daily consumption at typical serving sizes (1-2 scoops) for periods extending years. The removal of lactose during isolate processing makes GI tolerance substantially better than concentrate forms over time.

Whey isolate's near-zero lactose content (less than 1% by weight) means most lactose-sensitive individuals tolerate it well. The lack of xanthan gum reduces the bloating and gas some users experience with gum-stabilized protein powders. The natural cocoa used in dark chocolate flavoring may cause mild sensitivity in those with caffeine intolerance at high doses.

Yes — compatible with creatine, pre-workouts, omega-3s, and standard multivitamins. Count the added Vitamin D per scoop toward total daily D intake, particularly if using a dedicated Vitamin D supplement concurrently. Avoid combining with very high-calcium supplements in the same serving to prevent any mineral absorption competition.

Consume one scoop mixed in 8-10 oz cold water or milk ideally within 30-60 minutes post-workout. Total daily protein from all sources should be calibrated to body weight (typically 1.6-2.2g per kg for active individuals). Seal the bag and store in a cool, dry place after each use to preserve freshness.

Post-workout muscle protein synthesis begins within 1-3 hours after consumption. Consistent use over 4-8 weeks of progressive resistance training yields measurable lean mass and strength gains. The additional 1,000mg L-Leucine per serving provides an immediate anabolic signaling boost beyond what standard whey delivers.