Which is the cheapest per kg?

QUAMTRAX Whey protein 2kg / Choco leche from Quamtrax, at €34.95/kg (2000 g pack for €69.90). It is at verification level 1 out of 4: price is only 35 % of the mark.

How was this selection made?

The 7 whey protein products sold by Quamtrax, scored with the same score as the rest of the site. Its median is €41.45/kg, 8 % below the median of the 17 stores compared (€45.14/kg). The order within the table is the usual score: 35 % price per kg against the cheapest in the category, 35 % verifiable quality (certification, purity and additives), 20 % the category's own requirements and 10 % the buyers' rating at the store. Affiliate links do not enter the calculation. Prices collected on October 15, 2026.

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Selection within whey protein (concentrate) · data from October 15, 2026

The best whey protein from Quamtrax: 7 products by price per kg

The short answer. Of the 7 products that pass this filter, the highest scoring is QUAMTRAX Whey protein 2kg / Choco leche from Quamtrax: €34.95/kg and verification level 1 out of 4. The selection runs from €34.95/kg to €43.90/kg, with a median of €41.45/kg.

The 7 whey protein products sold by Quamtrax, scored with the same score as the rest of the site. Its median is €41.45/kg, 8 % below the median of the 17 stores compared (€45.14/kg).

† Some links are affiliate links — they do not change the ranking

Some store links are affiliate links: if you buy through them, this site may earn a commission at no extra cost to you. It changes nothing in the ranking: the score is computed beforehand and without reading those links, and products with no affiliate programme appear exactly the same. How it is calculated.

The three that stand out

Cheapest per kg of protein and best value for money

QUAMTRAX Whey protein 2kg / Choco leche

€34.95/kgNo third-party seal

€46.60 per kg of protein: the cheapest of those that meet the category's requirements and are not underdosed.

Score 63 out of 100: the highest mark, with 35 % of the weight on price per kg.

At Quamtrax · see how its score breaks down

The full selection

products compared

from €34.95 to €43.90

per kg

at verified level 4

Filter and sort

SearchStoreMax €/kgSort by

Only

Products sorted by score (recommended)
#	Product	Store
01	QUAMTRAX Whey protein 2kg / Choco leche · 4 flavours	Quamtraxfree delivery	€69.90	€34.95 /kg≈ €46.60 /kg of protein	63
02	QUAMTRAX Whey protein 900g / Fresa y kiwi	Quamtraxfree delivery	€35.90	€39.89 /kg≈ €53.19 /kg of protein	61
03	QUAMTRAX Whey protein 500g / Neutro	Quamtraxfree delivery from €29	€20.50	€41.00 /kg≈ €54.67 /kg of protein	60
04	QUAMTRAX Iso whey 2kg / Plátano · 4 flavours	Quamtraxfree delivery	€82.90	€41.45 /kg≈ €55.27 /kg of protein	60
	QUAMTRAX Iso whey 1kg / Plátano · 6 flavours	Quamtraxfree delivery	€42.90	€42.90 /kg≈ €57.20 /kg of protein	60
05	QUAMTRAX Iso whey 2kg / Flips · 5 flavours	Quamtraxfree delivery	€83.90	€41.95 /kg≈ €55.93 /kg of protein	60
	QUAMTRAX Iso whey 1kg / Flips · 4 flavours	Quamtraxfree delivery	€43.90	€43.90 /kg≈ €58.53 /kg of protein	59

7 products in this table

What each tub contains

Median dose per serving

Price per kilo does not tell you how much active ingredient is inside the kilo. This table does: for each ingredient, the median dose per serving at each store and how many products reach the dose backed by studies (the same reference this site scores with).

Ingredients and dose per serving at Quamtrax and All other stores, for whey protein
Ingredient	Quamtrax	All other stores
Whey protein concentrateEvidence-backed dose: from 20 g per serving	—7 of 7 contain it · none publishes the dose	29 g244 of 244 contain it · 70 reach the dose

The dose is per serving, not per tub. A big tub with a short dose forces you to take two scoops to get the same, and then it lasts half as long: that is why the price per dose in the next section does not match the price per kilo.

Why one is cheaper than the other

Factor by factor, with both stores’ data

All other stores costs 9 % more per kg than Quamtrax (€45.26/kg against €41.45/kg, medians of both catalogues). That difference does not come out of nowhere. These are the data that explain it, with each store’s figure alongside: pack size (median), different brands in the catalogue, products with declared additives.

Where the price difference between Quamtrax and All other stores for whey protein comes from
Factor	Quamtrax	All other stores
Cost of one effective dosePrice per kg and price per dose point to the same store, so the dose does not erase the label difference: Quamtrax is cheaper both ways.	€1.105	€1.276
Pack size (median)Quamtrax sells bigger packs, and a big pack spreads the same tub, the same label and the same shipping over more kilos. Part of the price gap per kg is this and not a discount: comparing one store’s small pack with the other’s large one inflates the gap.	1 kg	930 g
Different brands in the catalogueQuamtrax mostly sells one brand, QUAMTRAX: 100 % of its catalogue in this category. All other stores spreads its own across 55 brands. A store selling its own brand skips the manufacturer’s margin and can cut the price without touching the formula; a reseller pays that margin and passes it on, and in exchange carries brands the other does not sell.	1 (100 % QUAMTRAX)	55 (26 % Myprotein)
Products with declared additivesWhat the pages of both declare: colourings, artificial sweeteners, anti-caking agents. An additive is not fraud, but it takes up grams that are not active ingredient and is cheaper than the active ingredient: where more additive is declared, the price per kg drops without the product being better.	0 %	32 %

None of these factors is an accusation. They are medians of what each store publishes on its pages on the day prices were collected: where a page does not declare a figure, that store does not count in that row instead of counting as a zero. A specific product can contradict its store’s median, and that is what the full table is for. How all of this is calculated.

This is a filter, not another ranking. The score that sorts this table is exactly the same as in the full whey protein comparison: the only thing removed here is the products that do not meet the criterion above. How it is calculated.

Questions about this whey protein selection

Answered with the data on this page

Which is the best whey protein in this selection?: QUAMTRAX Whey protein 2kg / Choco leche from Quamtrax, with 63 points out of 100 at €34.95/kg. The 7 whey protein products sold by Quamtrax, scored with the same score as the rest of the site. Its median is €41.45/kg, 8 % below the median of the 17 stores compared (€45.14/kg).
Which is the cheapest per kg?: QUAMTRAX Whey protein 2kg / Choco leche from Quamtrax, at €34.95/kg (2000 g pack for €69.90). It is at verification level 1 out of 4: price is only 35 % of the mark.
How was this selection made?: The 7 whey protein products sold by Quamtrax, scored with the same score as the rest of the site. Its median is €41.45/kg, 8 % below the median of the 17 stores compared (€45.14/kg). The order within the table is the usual score: 35 % price per kg against the cheapest in the category, 35 % verifiable quality (certification, purity and additives), 20 % the category's own requirements and 10 % the buyers' rating at the store. Affiliate links do not enter the calculation. Prices collected on October 15, 2026.

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