Myprotein: Clear Whey Isolate Protein Powder Sour Watermelon (Sour Watermelon)
Displayed tub price observed: 2026-10-01. Listing updated: 2026-10-01. Nutrition processed: 2026-09-11.
Myprotein vs Optimum Nutrition
Myprotein: $2.81 per 25g protein. Optimum Nutrition: $0.90. Compare the recorded prices, formula differences, and evidence below.
Which should you choose?
For lower cost per 25g protein, the selected Optimum Nutrition listing costs $0.90, $1.91 less than the other selected listing.
Myprotein: Clear Whey Isolate Protein Powder Sour Watermelon (Sour Watermelon) · 499g pack · Price observed 2026-10-01.
Optimum Nutrition: Gold Standard Whey Protein Powder Vanilla (Vanilla) · 834.6g pack · Price observed 2026-10-01.
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Lab testing
Informed Choice
Informed Choice
Index score
69FairIndex / 100
84GoodIndex / 100
Cost / 25g protein
$2.81
$0.90
Protein / serving
20.00115g
24g
Formulation / 100
50
50
Sugar / 25g protein
0.0g
1.0g
Flavor
Sour Watermelon
Vanilla
Score and nutrition trade-offs
Optimum Nutrition: Gold Standard Whey Protein Powder Vanilla (Vanilla) scores 84/100 versus 69/100 for Myprotein: Clear Whey Isolate Protein Powder Sour Watermelon (Sour Watermelon). The WheyIndex score compares protein delivery, value, and testing evidence; it does not measure muscle growth or establish product safety.
The stored labels give 0.0g sugar per 25g protein for Myprotein and 1.0g for Optimum Nutrition. The selected flavors are Sour Watermelon and Vanilla; this is not a same-flavor taste test.
Products, sources, and dates
One highest-ranked eligible tracked whey listing per brand; lower cost per 25g breaks score ties. These selections do not represent every product from either brand.
Optimum Nutrition: Gold Standard Whey Protein Powder Vanilla (Vanilla)
Displayed tub price observed: 2026-10-01. Listing updated: 2026-10-01. Nutrition processed: 2026-09-10.
Cost per 25g = recorded cost per serving ÷ protein grams per serving × 25. Flavor, pack size, and label rounding can affect the result. Scoring methodology.
Frequently asked questions
Which selected product costs less: Myprotein or Optimum Nutrition?
Optimum Nutrition: Gold Standard Whey Protein Powder Vanilla (Vanilla) costs $0.90 per 25g protein versus $2.81 for Myprotein: Clear Whey Isolate Protein Powder Sour Watermelon (Sour Watermelon). That is $1.91 less per equal protein portion using the displayed rounded prices, or 68% less than the more expensive listing.
Do these results rank the whole brands?
No. The starting table selects the highest-ranked eligible tracked whey listing from each side, breaking score ties by lower cost per 25g. When scores are missing, the selection cannot establish a quality winner. Flavors, sizes, and available records may differ. Swap a powder to compare another version.
Are these prices checked today?
Not necessarily. The source records below show when the displayed tub price was observed and when nutrition was processed. These are stored observations, not checkout quotes. Manufacturer pages support formula context; their current prices are not substituted for the tracked retailer prices.