Creatine sells for €8.95 to €293 a kilo. We tell you which one to buy.
Sports supplement comparison: price per kilo and verified certification
The short answer. Compares 4,065 supplements from 19 Spanish stores across 50 categories by price per kilo (or per capsule) and by how verifiable their certification is, from 1 to 4. The ranking is set by a score out of 100 (35 % price; the rest, verifiable quality, category requirements and ratings) which never looks at affiliate links. Unlike stores and review sites, nobody pays for the order here and every seal is checked with whoever issues it. Prices from October 15, 2026.
- Whey protein (concentrate)Best valueHSN Raw Series 100% Whey protein concentrate 2Kg€30.00/kgfrom €20.00251 productsup to €89.32
- CreatineBest valueFirm Foods Creatina 2 kg (2x 1 kg)€8.95/kgfrom €8.95223 productsup to €293.27
- CollagenBest valueHSN Raw Series Colágeno hidrolizado (bovino) en polvo 1Kg€24.51/kgfrom €24.51168 productsup to €210.00
Sort the table by your own criterianow: the site's own, 35 % price
The order of the table below comes from a score out of 100: 35 % price 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. Here you decide how much price weighs; the rest is split among the other three parts in the same proportions. At the starting point, 35 % price, the table gives the same score as each product page. Move it and see what holds up.
The best of the 10 best-stocked categories
| Product | Store | Unit price | Verification | Score |
|---|---|---|---|---|
| Whey protein (concentrate) | ||||
| HSN | €30.00/kg | Brand lab report | 80 | |
€20.00/kgmedian €45.14€89.32/kg | ||||
| Creatine | ||||
| Zumub | €8.95/kg | No third-party seal | 85 | |
€8.95/kgmedian €59.67€293.27/kg | ||||
| Whey protein isolate | ||||
| Amazon | €26.99/kg | No third-party seal | 83 | |
€26.99/kgmedian €59.94€93.30/kg | ||||
| Collagen | ||||
| HSN | €24.51/kg | Brand lab report | 85 | |
€24.51/kgmedian €60.06€210.00/kg | ||||
| Magnesium | ||||
| PromoFarma | €0.042/capsule | No third-party seal | 80 | |
€0.049/capsulemedian €0.121€0.783/capsule | ||||
| Omega 3 | ||||
| Bulevip | €0.041/capsule | No third-party seal | 73 | |
€0.058/capsulemedian €0.228€1.067/capsule | ||||
| Vegan protein | ||||
| HSN | €9.22/kg | Brand lab report | 81 | |
€7.39/kgmedian €27.94€74.06/kg | ||||
| Vitamin D | ||||
| Amazon | €0.022/capsule | No third-party seal | 82 | |
€0.022/capsulemedian €0.128€0.633/capsule | ||||
| Vitamin C | ||||
| Amazon | €0.041/capsule | No third-party seal | 80 | |
€0.041/capsulemedian €0.156€0.833/capsule | ||||
| BCAA | ||||
| Zumub | €17.49/kg | No third-party seal | 83 | |
€17.49/kgmedian €59.78€273.40/kg | ||||
The score sets the ranking. Neither affiliation nor any commercial deal moves a product from its place; there is an automated test that checks it on every data update. 78 products carry a badge from this site, and a badge certifies a published editorial criterion, never an effect on your body. Badge criteria.
The other 40 categories
Same method, same table
Most searched comparisons
The table already filtered for one specific purchase
- El mejor colageno barato85 prod.
- La mejor creatina con sello Creapure44 prod.
- La mejor creatina barata112 prod.
- El mejor magnesio barato78 prod.
- El mejor omega 3 con sello IFOS14 prod.
- El mejor omega 3 barato77 prod.
- La mejor proteina aislada barata92 prod.
- La mejor proteina vegana barata71 prod.
- La mejor proteina whey barata126 prod.
- La mejor vitamina D barata69 prod.
- Amazon or DosFarma for collagen80 prod.
- Amazon or USA Fitness for creatine100 prod.
- Amazon or DosFarma for magnesium95 prod.
- Amazon or PromoFarma for omega 374 prod.
- Amazon or Myprotein for whey isolate96 prod.
- Amazon or Bulevip for vegan protein65 prod.
- Amazon or Myprotein for whey protein107 prod.
- Amazon or DosFarma for vitamin D86 prod.
Prices by brand
How to read the score
Three numbers, no stars
Score from 0 to 100
35 % price 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.
Read the methodology →Euros per kilo or per capsule
Every category is compared in the unit it is sold in: powders by the kilo, softgels and tablets by the capsule. The two are never mixed in the same table, and the price is the one a buyer pays today, not the crossed-out one.
Verification level
From 1 to 4. Only 4 means checked against the body that issues the certification.
Questions about this comparison tool
Answered with the data on this page
- How does this site decide which supplement is better?
- With a score out of 100: 35 % price 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. Every product shows its breakdown line by line.
- Why compare by price per kilo and not per pack?
- Because two tubs at the same price can cost twice as much as each other depending on what is inside. Every category is compared in the unit it is sold in: powders by the kilo, softgels and tablets by the capsule, and the two units are never mixed in the same table.
- Do affiliate links change the order of the products?
- No. The score is computed beforehand and without reading the affiliate file, and there is an automated test that fails if the ranking changes once they are applied. Products with no affiliate programme appear exactly the same.
- How often are the prices updated?
- They are collected again from the stores on every update; the ones in this version are from October 15, 2026. The price that counts is always the store's: here it is for comparing, not for paying.
- What does verification level 4 mean?
- That the certification is backed by someone who is not the brand: either it has been checked with the body that issues it (Creapure QS code, batch in Informed Sport), or the product carries in its name a trademark that requires a third party behind it, such as Creapure or IFOS. A loose logo on the label stays at level 2.