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Store against store · data from
Prozis or Quamtrax: which is cheaper across 4 categories
Prozis04Quamtraxacross 4 categories both of them sell
The short answer. Of the 4 categories both sell, Prozis has the lower median in 0 and Quamtrax in 4. Across the whole catalogue, Quamtrax sits 5 % below the market median and Prozis 13 % above.
No store is cheap at everything. This page does not name a winner: it gives each one’s median in every category they share, so you can see where each wins and by how much. Prices are from the last collection and change; catalogue and certification change far less.
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Category by category
Each store’s median, in its unit
| Category | Prozis | Quamtrax | Difference |
|---|---|---|---|
| Collagen5 products from Prozis and 4 from Quamtrax. | €67.96/kg+13 % vs market | €56.86/kg-5 % vs market | 20 %cheaper: Quamtrax |
| Creatine9 products from Prozis and 5 from Quamtrax. | €116.63/kg+95 % vs market | €63.00/kg+6 % vs market | 85 %cheaper: Quamtrax |
| Glutamine5 products from Prozis and 3 from Quamtrax. | €49.97/kg-16 % vs market | €49.17/kg-17 % vs market | 2 %cheaper: Quamtrax |
| Whey protein (concentrate)22 products from Prozis and 7 from Quamtrax. | €55.12/kg+22 % vs market | €41.45/kg-8 % vs market | 33 %cheaper: Quamtrax |
The median is not the price you will pay. It is the midpoint of that store’s catalogue in that category: it tells you where to start looking, not what to buy. That is what each category table is for, where the specific row counts.
Both stores, figure by figure
What is not today’s price
| Figure | Prozis | Quamtrax |
|---|---|---|
| Price indexMedian distance from the market median in the categories where it has three products or more. Negative is cheap. | +13 % | -5 % |
| Categories comparedAcross the whole site, in how many it has enough catalogue to be measured. | 10 | 5 |
| Products comparedThe ones this site collects from that store, not its whole catalogue. | 96 | 30 |
| Brands in the catalogueA single brand means own brand (no manufacturer margin); many means reselling. | 1 | 1 |
| With lab reportLevel 3 or 4: testing a batch costs money and is passed on in the price. | 2 of 96 | 1 of 30 |
| Product pages declaring additivesAn additive takes up grams that are not active ingredient and is cheaper than it. | 0 % | 3 % |
Questions about Prozis and Quamtrax
Answered with the data on this page
- Prozis or Quamtrax?
- Of the 4 categories both sell, Prozis has the lower median in 0 and Quamtrax in 4. Across the whole catalogue, Quamtrax sits 5 % below the market median and Prozis 13 % above. Price is not everything: Prozis publishes lab reports on 2 products and Quamtrax on 1.
- In which categories does each one win?
- Prozis is cheaper in none. Quamtrax is cheaper in collagen, creatine, glutamine, whey protein (concentrate). These are medians of each catalogue in each category’s unit, with prices from October 15, 2026.
- Which catalogue is bigger?
- Prozis has 96 products compared here across 15 categories and Quamtrax 30 across 10. Prozis sells only its own brand and Quamtrax only its own: a store selling its own brand skips the manufacturer’s margin, a reseller pays it and in exchange carries brands the other does not.
Keep comparing
The same stores, by category