Whey isolate · per 25 g protein
Cheaper alternatives to Optimum Nutrition whey isolate
Optimum Nutrition costs $2.35 per 25 g protein. The cheapest on our list is Transparent Labs at $1.73, 26% less. At one serving a day that is $632.18 a year instead of $858.48.
Popular brand
Optimum Nutrition
Gold Standard 100% Isolate Whey Protein powder · Chocolate Bliss · 44 Servings
- Per serving
- $2.35 per 25 g protein
- A year, one serving a day
- $858.48
- Container
- $103.49 at Optimum Nutrition
Cheapest on our list 26% less
Transparent Labs
Grass-Fed Whey Protein Isolate · 4LB · Unflavored
- Per serving
- $1.73 per 25 g protein
- A year, one serving a day
- $632.18
- Container
- $109.99 at Transparent Labs
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Products that cost less per 25 g protein
Top pick. Lowest price per serving among third-party tested products.
Transparent Labs Grass-Fed Whey Protein Isolate · 4LB · UnflavoredNSF Certified for Sport (opens in a new tab)Checked less than an hour ago
$1.73 per 25 g protein26% less than Optimum Nutrition per 25 g protein
BuySave me money at Transparent Labs (opens in a new tab)- Muscle Feast Whey Protein Isolate, Pasture Raised, Grass Fed, rBST/rBGH and soy free · 5lb · Unflavored
Checked less than an hour ago
$1.78 per 25 g protein24% less than Optimum Nutrition per 25 g protein
BuySave me money at Muscle Feast (opens in a new tab) - Jacked Factory Authentic Iso, Whey Protein Isolate · 25 Servings · Vanilla Oatmeal Cookie
Checked less than an hour ago
$1.80 per 25 g protein23% less than Optimum Nutrition per 25 g protein
BuySave me money at Jacked Factory (opens in a new tab) - ProMix Unflavored Whey Isolate Protein Powder · 1 Bag
Checked less than an hour ago
$1.86 per 25 g protein21% less than Optimum Nutrition per 25 g protein
BuySave me money at ProMix (opens in a new tab) - California Gold Nutrition Sport, Whey Protein Isolate, Unflavored · 1 lb
Checked less than an hour ago
$1.95 per 25 g protein17% less than Optimum Nutrition per 25 g protein
BuySave me money at Vitacost (opens in a new tab) - NutraBio Whey Protein Isolate Powder · 50 Servings · Unflavored
Checked less than an hour ago
$2.20 per 25 g protein6% less than Optimum Nutrition per 25 g protein
BuySave me money at NutraBio (opens in a new tab)
Optimum Nutrition side by side
- Optimum Nutrition vs Transparent Labs whey isolateTransparent Labs costs 26% less per 25 g protein than Optimum Nutrition: $1.73 vs $2.35.
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Questions
What is the cheapest alternative to Optimum Nutrition whey isolate?
Today it is Transparent Labs at $1.73 per 25 g protein, 26% less than Optimum Nutrition at $2.35 on the same basis.
How is "% less" worked out?
We divide each container's price by the amount of active ingredient its label says it holds, then compare that price per 25 g protein. It is our comparison, not a store sale. The store sets the price at checkout.
Is a cheaper whey isolate the same as Optimum Nutrition?
We compare the labeled amount of the active ingredient, not quality, taste or testing. Each row shows any third-party testing we found. We don't test products and don't tell you what to take.
Whey isolate buying guides
- Best whey protein isolate 2026: cost per 25 g proteinThe best-value whey isolates right now, ranked by what you pay for 25 g of protein rather than per scoop or per tub, plus how to spot a blend sold as isolate.
- Whey isolate vs concentrate: is isolate worth it? Price per 25 g proteinIsolate is at least 90% protein with very little lactose; concentrate is cheaper and fine for many people. Compare tubs by cost per 25 g of protein.
We show prices. We don't sell the products or tell you what to take. How we compare · Disclaimer