Cheapest Whey Protein in the US
(September 2026)
We track 53 full-size whey protein products on Amazon.com and rank them by cost per gram of protein. This month's lowest-priced options: concentrate from Raw Grassfed at $0.053/g, blend from Optimum Nutrition at $0.027/g, isolate from NOW Foods at $0.055/g. Compare concentrate, blend, and isolate below, then choose the form that fits your goals.
// cheapest_whey_blend_us
Blends combine concentrate and isolate, and are a practical all-round choice for most daily training.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | Optimum Nutrition Gold Standard 100% Whey Protein Powder, Vanilla Ice Cream, 5 Pound (Packaging May Vary)Optimum Nutrition ✓ certified | $96.28 | 5lb | $0.027 | unchanged | View deal → |
| 2 | Premier Protein 30g High Protein Powder, 100% Whey, Chocolate, 29 ServingsPremier Protein ✓ certified | $43.49 | 3lb | $0.050 | ↑ 16.0% | View deal → |
| 3 | Muscle Milk Pro Series Protein Powder Supplement,Knockout Chocolate,2 Pound,11 Servings,50g Protein,3g Sugar,20 Vitamins & Minerals,NSF Certified for Sport,Workout Recovery,Packaging May VaryMuscle Milk ✓ certified | $27.97 | 2lb | $0.051 | unchanged | View deal → |
| 4 | MuscleTech Whey Protein Powder (Milk Chocolate, 4LB) - 30g ProteinMuscletech ✓ certified | $64.99 | 4lb | $0.054 | ↓ 13.7% | View deal → |
| 5 | Body Fortress Super Advanced Whey Protein Powder, Chocolate, 3.9 lbsBody Fortress ✓ certified | $67.02 | 4lb | $0.057 | ↑ 12.1% | View deal → |
| 6 | Dymatize Elite 100% Whey Protein Powder, Cookies & Cream, 25g of Protein, 5.5g BCAAs, Less Than 140 Cal., Gluten Free, 2g Carb, 2g Sugar, 3g Fat (63 Servings)Dymatize Nutrition ✓ certified | $98.29 | 5lb | $0.062 | ↑ 8.6% | View deal → |
| 7 | BSN SYNTHA-6 Edge Powder, Low Sugar, Chocolate Milkshake, 28 ServingsBSN ✓ certified | $47.99 | 2lb | $0.071 | ↓ 5.8% | View deal → |
1 product per brand · 900g+ packs only · ranked by $/g protein · prices updated daily from Amazon.com.
// cheapest_whey_concentrate_us
Concentrate is the standard whey form, with small amounts of fat and lactose and strong value for most buyers.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | Raw Grass Fed Whey Protein Powder, Unflavored – 1 Ingredient, No Additives or Fillers, Undenatured, Made in USA, 5 lbRaw Grassfed ✓ certified | $99.99 | 5lb | $0.053 | unchanged | View deal → |
| 2 | Nutricost Whey Protein Concentrate Powder (Unflavored) 5 LBNutricost ✓ certified | $102.95 | 5lb | $0.060 | ↑ 1.0% | View deal → |
| 3 | NAKED Whey 5LB 100% Grass Fed Unflavored Whey Protein Powder - Only 1 Ingredient, NSF Certified, Undenatured, Gluten Free, Soy Free, Promote Muscle Growth and Recovery - 76 ServingsNAKED ✓ certified | $139.99 | 5lb | $0.074 | ↑ 40.0% | View deal → |
| 4 | Levels Whey Protein Powder, No Artificials, Double Chocolate, 5LBLevels ✓ certified | $129.99 | 5lb | $0.076 | ↑ 44.4% | View deal → |
1 product per brand · 900g+ packs only · ranked by $/g protein · prices updated daily from Amazon.com.
// cheapest_whey_isolate_us
Isolate is filtered for high protein with very little fat or lactose—a useful option for cutting or lactose sensitivity.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | NOW Foods Sports Nutrition, Whey Protein Isolate, 25 g With BCAAs, Creamy Vanilla Powder, 5-PoundNOW Foods ✓ certified | $98.15 | 5lb | $0.055 | ↓ 0.1% | View deal → |
| 2 | Dymatize ISO100 Protein Powder, 100% Whey Isolate, Fruity PebblesDymatize ✓ certified | $106.99 | 5lb | $0.057 | ↓ 1.8% | View deal → |
| 3 | ALLMAX AllWhey Gold Whey Protein Powder, Chocolate, 5 lbALLMAX ✓ certified | $99.99 | 5lb | $0.059 | unchanged | View deal → |
| 4 | Muscle Feast Grass-Fed Whey Protein Isolate Powder, Chocolate (5lb)Muscle Feast ✓ certified | $134.90 | 5lb | $0.072 | unchanged | View deal → |
| 5 | Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Gluten Free, with Vitamins, Unflavored, 25g Protein Per Serving, 3 lbIsopure ✓ certified | $90.89 | 3lb | $0.077 | unchanged | View deal → |
| 6 | Optimum Nutrition Gold Standard Isolate Protein Powder, Rich Vanilla, 3 LBOptimum Nutrition ✓ certified | $89.99 | 3lb | $0.082 | ↑ 10.5% | View deal → |
| 7 | NAKED Whey Isolate Protein - Only 2 Ingredients, 30g Grass-Fed Protein, Zero Carb, Unflavored, Undenatured, Non-GMO, No Soy, Gluten-Free, No Preservatives - 28 ServingsNAKED ✓ certified | $74.99 | 2lb | $0.089 | ↑ 15.4% | View deal → |
1 product per brand · 900g+ packs only · ranked by $/g protein · prices updated daily from Amazon.com.
// top_pick_per_type
Best Blend: Optimum Nutrition
Optimum Nutrition Gold Standard 100% Whey Protein Powder, Vanilla Ice Cream, 5 Pound (Packaging May Vary) is the best-value whey blend in our US ranking this month at $0.027 per gram of protein. It costs $96.28 for 5lb. See full nutrition breakdown →
Best Concentrate: Raw Grassfed
Raw Grass Fed Whey Protein Powder, Unflavored – 1 Ingredient, No Additives or Fillers, Undenatured, Made in USA, 5 lb is the best-value whey concentrate in our US ranking this month at $0.053 per gram of protein. It costs $99.99 for 5lb. See full nutrition breakdown →
Best Isolate: NOW Foods
NOW Foods Sports Nutrition, Whey Protein Isolate, 25 g With BCAAs, Creamy Vanilla Powder, 5-Pound is the best-value whey isolate in our US ranking this month at $0.055 per gram of protein. It costs $98.15 for 5lb. See full nutrition breakdown →
// how_to_buy_smart
Concentrate vs. blend vs. isolate
Concentrate is the best-value standard choice for most people. Blends combine concentrate and isolate for a versatile middle ground. Isolate has less lactose and fat, but typically costs more per gram of protein.
How to calculate protein value
Divide the total price by the total protein in the tub: servings × protein per serving. That lets you compare different pack sizes and brands on the same basis.
Example: $40 ÷ (60 servings × 24g) = $0.028/g.
Why we show full-size packs
Small trial packs usually carry a higher per-gram cost. The rankings use tubs and bags of at least 900g so they reflect comparable full-size purchases.
Want to catch the next price drop? Get US protein deal alerts on Telegram.
Join US alerts →// faq
Which is the cheapest whey protein in the US right now?
Our tables rank the current lowest cost per gram of protein separately for blends, concentrates, and isolates. Prices are refreshed daily, so check the table before buying.
Is budget whey protein good quality?
Price per gram measures value, not taste, digestibility, label accuracy, or independent testing. Check the ingredient label and consider third-party-tested products if those factors matter to you.
How often do US whey protein prices change?
Amazon.com prices, coupons, and limited-time deals can change daily. This page updates from the live catalog after the daily price refresh.