at Transparent Labs
- Top pick. Lowest price per serving among third-party tested products.
- Best value. Lowest price per serving on this list.
Transparent Labs Grass-Fed Whey Protein Isolate
4LB / Unflavored

$1.73per 25 g protein
26% less per serving than Optimum Nutrition
Optimum Nutrition is $2.35 per 25 g protein.
$109.99 for 1587.3g protein · 63.5 servings of 25 g protein
Price checked
NSF Certified for Sport (opens in a new tab)Final price, stock and shipping are set by Transparent Labs at checkout. Some Buy links earn us a commission. Your price stays the same. How we make money
The label math
How we got $1.73. The tub price, divided by the servings inside.
How we calculated thisTransparent Labs
Grass-Fed Whey Protein Isolate
- Price at Transparent Labs
- $109.99
- Contents
- 1587.3g protein
- Servings
- 4 lb × 28 g protein per 32 g = 1587.25 g ÷ 25 g = 63.5
$109.99 ÷ 63.5 servings of 25 g protein = $1.73
$1.73 per 25 g protein
Price checked
Price history. One point for every daily check.
Price per 25 g protein, 39 daily checks at Transparent Labs.
- Every check
- $1.73 Sep 23 to Nov 7
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Per 25 g protein · % less than Optimum Nutrition
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24% lessat Muscle Feast
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About this product. In Transparent Labs's own words.
Transparent Labs 100% Grass-Fed Whey Protein Isolate has become a pantry staple among health-conscious consumers who want a quality source of protein for supporting muscle growth, recovery, and overall health.
From the Transparent Labs product page. These are Transparent Labs's own words, not ours. We do not verify them, we do not make or endorse any claim in them, and we are not liable for them. These statements have not been evaluated by the Food and Drug Administration. See the disclaimer.
What this serving is. Per 25 g protein.
- Priced per
- 25 g protein
- Contents
- 1587.3g protein
- Servings
- 63.5
- Serving on the label
- 28 g protein
- Listed as
- 4LB / Unflavored
- Stock
- In stock at the last check
Whey isolate. Price per 25 g of protein, not per scoop.
Prices shown per 25 g of protein, not scoop weight. Powder only. Blends and concentrates stay off this list.
Unflavored only (protein may vary slightly by flavor). 28 g protein per ~32 g scoop. NSF Certified for Sport (Unflavored, 999 g and 1831.5 g): https://www.nsfsport.com/certified-products/listing-detail.php?id=1756600, checked 2026-09-25. Also on the Informed Choice list (https://choice.wetestyoutrust.com/certified-products).
Cheaper alternatives to Optimum Nutrition whey isolate
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