Quick Picks
Eight products that made our shortlist after filtering across all 12 tracked US retailers. Click any pick to see live prices, all retailers, and the latest deal.
How We Ranked These
Filtered to whey isolate and whey blend products delivering at least 24g protein per scoop. Then ranked by protein per scoop and cost per gram. Hydrolyzed picks get a small bump.
All prices verified within the last 24 hours. We re-check every product across all 12 tracked retailers (Walmart, Amazon, iHerb, GNC, Bodybuilding.com, Target, Vitacost, Muscle & Strength, Costco, Tiger Fitness, MyProtein, Transparent Labs) every two hours. Out-of-stock products are excluded from these rankings entirely.
Our Top Pick
5 lb · 30g protein/scoop · 50 servings
30g protein per scoop is the high end for pure isolate. Fast-absorbing, low-fat, low-carb. Mixed within 30 minutes of finishing your last set, it covers the post-training protein window with margin to spare. See Walmart price →
Runner-Up
4 lb · 30g protein/scoop · 53 servings
Same isolate category, different flavor profile and slightly higher per-gram cost. Pick if the top pick's flavor lineup doesn't fit you. See Walmart price →
Honorable Mentions
The next picks worth knowing about. Slightly different trade-offs but still in the top tier for this category.
Cellucor Whey Sport. 5 lb, 30g protein/scoop, $59.99 at Amazon.
Nutricost Whey Protein Isolate. 5 lb, 30g protein/scoop, $62.95 at Walmart.
Cellucor Whey Sport Protein Isolate. 5 lb, 30g protein/scoop, $69.99 at Amazon.
Optimum Nutrition Platinum Hydrowhey. 3.5 lb, 30g protein/scoop, $64.99 at Amazon.
See live post-workout whey pricing
Whey isolate and high-protein blends with live pricing across 12 retailers.
Browse whey isolate →Frequently Asked Questions
25 to 40g. Studies suggest muscle protein synthesis maximizes around 0.4g per kg of bodyweight per dose, which means 30g for a 75 kg lifter, 40g for a 100 kg lifter. Going much higher per dose doesn't add benefit.
Within an hour is the practical guideline. The old '30-minute anabolic window' is overstated; modern research shows the favorable window extends to 2 to 3 hours. Within 60 minutes is the easiest habit and captures most of the benefit.
Marginally. Isolate absorbs slightly faster and has less lactose, so users with mild GI sensitivity prefer it. For everyone else, the protein/dollar advantage of blends makes them the more practical default. Both deliver functionally equivalent muscle protein synthesis.
If you're bulking or training again later that day, yes; 30 to 50g of carbs alongside speeds glycogen replenishment. If you're cutting or only training once that day, protein alone is fine.
Not unless you train very late at night. Whey digests in 1 to 2 hours, so a 7pm post-workout shake is fully cleared by bedtime. If you train at 10pm and drink a shake at 11, switch to a casein blend instead for slower overnight digestion.
Yes. 200g of chicken breast or 4 large eggs deliver similar post-workout protein to a shake. Shakes win on convenience and speed of absorption; whole food wins on satiety and micronutrient density. Use both depending on context.
Related Rankings
Other useful price comparisons on ProteinPrice.com:
- The full best-value protein ranking across all 377 tracked products.
- Head-to-head product comparisons across our catalog.
- Browse whey isolate, the cleanest whey category by macros.
- Browse all whey protein blends, isolates, and concentrates.
- Casein protein for slow-release recovery and bedtime use.
- Plant protein from pea, rice, hemp, and soy blends.
- Mass gainers for hard gainers and calorie-surplus bulking.
- Protein bar comparisons across 70+ tracked bars.
- Ready-to-drink shakes and protein waters.
- Current protein deals live across all retailers.