How does Optimum Nutrition Gold Standard compare to a higher Index whey?

Shoppers know Optimum Nutrition Gold Standard. Fewer know the Quality Index or cost per 25g of protein. Here is a US, pack-specific live compare: one familiar Gold Standard listing against a higher Index isolate, plus a same-Index value foil.

Live US baseline: this Gold Standard pack

Cite the pack you mean. This page uses Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate, 1 lb, locked from the product page on 20 Sep 2026 (CEST):

Field	Live value
Quality Index	93/100 Excellent
Cost per 25g protein	$2.68
Sugar per 25g protein	1.0g
Formulation checks	6 of 6

Index leads. At 93 this pack sits in the Excellent band (≥80). Formulation passes all six checks. Sugar is 1.0g per 25g protein. Then the money check: $2.68 per 25g.

Other Gold Standard flavours and tub sizes can land on different Index and $/25g figures. Stick to the URL you are shopping.

Higher Index alternative: NutraBio WPI

NutraBio Whey Protein Isolate (unflavored) on the same pull:

Field	Live value
Quality Index	96/100 Excellent
Cost per 25g protein	$1.87
Sugar per 25g protein	0.0g
Formulation checks	6 of 6

NutraBio leads this pair on Index (96 vs 93). Sugar sits at 0.0g per 25g. Cost per 25g is $1.87 on this listing, below the $2.68 on the ON 1 lb chocolate pack above. Both clear Excellent on Index; the gap is three Index points plus the supporting $/25g and sugar figures.

Same-Index value foil: Ascent 4 lb

If you want the same Index band as this ON pack with a lower protein cost, Ascent 100% Whey Vanilla Bean, 4 lb locked at:

Field	Live value
Quality Index	93/100 Excellent
Cost per 25g protein	$1.41
Sugar per 25g protein	1.0g
Formulation checks	6 of 6

Same Index as this ON pack (93). Same sugar per 25g (1.0g). Cost per 25g is $1.41 versus $2.68 on the 1 lb Gold Standard listing.

Side by side

Product	Index	$/25g	Sugar /25g
NutraBio WPI	96/100	$1.87	0.0g
Ascent Vanilla Bean 4 lb	93/100	$1.41	1.0g
ON Gold Standard DR Chocolate 1 lb	93/100	$2.68	1.0g

Read Index first. NutraBio is the higher Index pick in this set. Ascent matches this ON pack’s Index and sugar while showing a lower $/25g. The ON 1 lb chocolate pack clears Excellent and costs more per 25g on today’s lock.

Index first, then dollars

Every scored product gets an Index from 0 to 100:

• 60% formulation: six ingredient checks (artificial colors, flavors, preservatives, sweeteners, fillers/thickeners, high-fructose corn syrup)
• 30% sugar: scored from sugar grams per 25g of protein
• 10% value: lower cost per 25g inside the same sales market scores higher

Full detail: How the Index works. Scores are a comparison model, not a lab safety assay, and they are not for sale.

Cost per 25g is the supporting unit:

Cost per 25g = (cost per serving ÷ protein grams per serving) × 25

Tub sticker price ranks the container. The guide walks the formula: Tub price is a lie: cost per 25g of protein.

Re-check on Compare

Prices and Index components move. Open Compare, put these three (or your own finalists) on one screen, and read Index, $/25g, and sugar per 25g together before you buy.

Before you buy

Open both product pages on wheyindex.com. Read today’s Index first, then $/25g and sugar per 25g. Refresh if the listing has moved, then decide.