How do I compare protein powders without trusting the tub claims?
Use the WheyIndex Quality Index (60% formulation, 30% sugar, 10% value), cost per 25g protein, and sugar per 25g to compare US whey powders with live numbers.
Guides
Protein, ingredients, and nutrition explained.
Is there a clean whey under $1 per 25g of protein?
Yes in the US catalogue: Muscle Feast Grass-Fed Whey Isolate Chocolate 5 lb scores Index 94 at $0.91 per 25g with 0.1g sugar. Lead with Quality Index, then cost per 25g.
How does Optimum Nutrition Gold Standard compare to a higher Index whey?
US live compare: ON Gold Standard Double Rich Chocolate 1 lb scores Index 93 at $2.68 per 25g. NutraBio WPI leads at Index 96 and $1.87 per 25g. Ascent Vanilla Bean 4 lb matches Index 93 at $1.41.
What is the lowest sugar whey that still scores high on the Index?
US live anchors: NutraBio WPI Index 96 at 0.0g sugar and $1.87 per 25g; Isopure Clear Citrus Lemonade Index 93 at 0.0g; Muscle Feast GF Isolate Chocolate Index 94 at 0.1g and $0.91. Sugar is 30% of Index.
Why did protein powder cost per 25g move, and what does inflation show?
US WheyIndex inflation sits at +17.0% for Sep 2026 (Aug +17.5%). See how the tracker works, how it relates to cost per 25g, and why Index still comes first.
What is the best plant protein in the UK by Index and £ per 25g?
UK live pea anchors: bulk Pea Isolate Chocolate Mint Index 100 at £0.38 per 25g; LAMBERTS Concentrated Pea Index 100 at £0.97; PULSIN Natural Index 97 at £0.94. All 0.0g sugar. Index first, then £/25g.
How to read a Protein Receipt
Share Index, $/25g, sugar, and formulation as a snapshot instead of tub marketing.
Tub price is a lie: cost per 25g of protein
Normalize every tub to cost per 25 grams of protein before you rank value.
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