Prozis or Zumub for whey protein: which is better value per kg

Prozis or Zumub for whey protein?

On price per kg, Zumub: its median is €34.98/kg against €55.12/kg at Prozis, which is 58 % dearer. The median does not decide on its own: most of the rest of the mark is certification, and there Prozis has 0 products at level 4 and Zumub has 0.

Which is the cheapest whey protein across the two stores?

Mutant Whey 4,54 kg from Zumub, at €23.35/kg (4540 g pack for €105.99), at verification level 1 out of 4.

Why don’t Prozis and Zumub cost the same?

Prozis costs 58 % more per kg than Zumub (€55.12/kg against €34.98/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. Price per kg and price per dose point to the same store, so the dose does not erase the label difference: Zumub is cheaper both ways. Zumub 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.

Which of the two stores scores better?

Zumub Proteína Whey Fusion 4kg (4x 1kg) from Zumub, with 72 out of 100. The score is 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, and it is computed without looking at affiliate links. Prices from October 31, 2026.