Which is the cheapest per kg?

VitoBest Whey Matrix 50/50 Chocolate 2kg from PromoFarma, at €25.05/kg (2000 g pack for €50.09). It is at verification level 1 out of 4: price is only 35 % of the mark.

How was this selection made?

The 15 whey protein products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €50.32/kg, 11 % above 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 PromoFarma: 15 products by price per kg

The short answer. Of the 15 products that pass this filter, the highest scoring is VitoBest Whey Matrix 50/50 Chocolate 2kg from PromoFarma: €25.05/kg and verification level 1 out of 4. The selection runs from €25.05/kg to €89.32/kg, with a median of €50.32/kg.

The 15 whey protein products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €50.32/kg, 11 % above 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

VitoBest Whey Matrix 50/50 Chocolate 2kg

€25.05/kgNo third-party seal

€33.40 per kg of protein: the cheapest of those that meet the category's requirements and are not underdosed.

Score 69 out of 100: the highest mark, with 35 % of the weight on price per kg.

At PromoFarma · see how its score breaks down

The full selection

products compared

from €25.05 to €89.32

per kg

at verified level 4

Filter and sort

SearchStoreMax €/kgSort by

Products sorted by score (recommended)
#	Product	Store
01	VitoBest Whey Matrix 50/50 Chocolate 2kg	PromoFarma	€50.09	€25.05 /kg≈ €33.40 /kg of protein	69
02	BioTechUSA Biotech Usa 100% Pure Whey Strawberry 1000 g	PromoFarma	€35.89	€35.89 /kg≈ €47.85 /kg of protein	62
	BioTechUSA Biotech Usa 100% Pure Whey Strawberry 454g	PromoFarma	€19.89	€43.81 /kg≈ €58.41 /kg of protein	59
03	Equilibre Attitude Actitud Equilibrio Ea-Fit Pure Whey Strawberry 750 g	PromoFarma	€32.07	€42.76 /kg≈ €57.01 /kg of protein	60
04	Eafit Pure Whey Myrtille 750g	PromoFarma	€32.10	€42.80 /kg≈ €57.07 /kg of protein	60
05	Equilibre Attitude Balance Attitude Ea-Fit Pure Whey Choco Nois 750 g	PromoFarma	€32.42	€43.23 /kg≈ €57.64 /kg of protein	60
06	Weider Gold Whey Chocolate 500 g	PromoFarma	€23.90	€47.80 /kg≈ €63.73 /kg of protein	58
07	NAMED Sport 100% Whey Protein Shake Choco Brownie 900 g	PromoFarma	€45.29	€50.32 /kg≈ €67.09 /kg of protein	58
08	Finisher Whey Protein 500gr	PromoFarma	€26.09	€52.18 /kg≈ €69.57 /kg of protein	57
09	Ultimate Whey Gold 100% Vainilla 1.5kg	PromoFarma	€98.94	€65.96 /kg≈ €87.95 /kg of protein	55
	Ultimate Whey Gold 100% Banana 750 gpricey now	PromoFarma	€49.87	€66.49 /kg≈ €88.65 /kg of protein	55
10	Ultimate Lactosuero Oro 100% Cacao 1,5 Kg	PromoFarma	€118.93	€79.29 /kg≈ €105.72 /kg of protein	54
11	Ultimate Whey Gold 100% Stracciatella 750 g	PromoFarma	€61.46	€81.95 /kg≈ €109.27 /kg of protein	53
12	Ultimate Whey Chef Polv 700 g	PromoFarma	€61.23	€87.47 /kg≈ €116.63 /kg of protein	53
13	NEW SYFORM Syform Optiwhey Banana/Vanilla 900 g	PromoFarma	€80.39	€89.32 /kg≈ €119.09 /kg of protein	53

15 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 PromoFarma and All other stores, for whey protein
Ingredient	PromoFarma	All other stores
Whey protein concentrateEvidence-backed dose: from 20 g per serving	—15 of 15 contain it · none publishes the dose	29 g236 of 236 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

PromoFarma costs 12 % more per kg than All other stores (€50.32/kg against €45.00/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), products with declared additives.

Where the price difference between PromoFarma and All other stores for whey protein comes from
Factor	PromoFarma	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: All other stores is cheaper both ways.	€1.342	€1.226
Pack size (median)All other stores 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.	750 g	1 kg
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 %	33 %

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?: VitoBest Whey Matrix 50/50 Chocolate 2kg from PromoFarma, with 69 points out of 100 at €25.05/kg. The 15 whey protein products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €50.32/kg, 11 % above the median of the 17 stores compared (€45.14/kg).
Which is the cheapest per kg?: VitoBest Whey Matrix 50/50 Chocolate 2kg from PromoFarma, at €25.05/kg (2000 g pack for €50.09). It is at verification level 1 out of 4: price is only 35 % of the mark.
How was this selection made?: The 15 whey protein products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €50.32/kg, 11 % above 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.

Other ways to look at whey protein

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