Selection within magnesium · data from
The best magnesium from PromoFarma: 15 products by price per capsule
The short answer. Of the 15 products that pass this filter, the highest scoring is Santiveri Santiveres Cloruro de Magnesio 200 caps from PromoFarma: €0.042/capsule and verification level 1 out of 4. The cheapest per capsule is Vbyotics Magmax Magnesio Citrato 500mg 100caps from PromoFarma, at €0.119/capsule. The selection runs from €0.119/capsule to €0.473/capsule, with a median of €0.187/capsule.
The 15 magnesium products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.187/capsule, 55 % above the median of the 13 stores compared (€0.121/capsule).
† 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
Vbyotics Magmax Magnesio Citrato 500mg 100caps
€0.119/capsuleNo third-party seal
€0.119 per capsule: the cheapest of those that meet the category's requirements and are not underdosed.
At PromoFarma · see how its score breaks down
Santiveri Santiveres Cloruro de Magnesio 200 caps
€0.042/capsuleNo third-party seal
Score 80 out of 100: the highest mark, with 35 % of the weight on price per capsule.
At PromoFarma · see how its score breaks down
The full selection
15
products compared
from €0.119 to €0.473
per capsule
0
at verified level 4
Filter and sort
| # | Product | Store | |||
|---|---|---|---|---|---|
| 01 | PromoFarma | €8.49 | €0.042 /capsule | 80 | |
| 02 | PromoFarma | €3.29 | €0.073 /capsule | 61 | |
| 03 | PromoFarma | €11.89 | €0.119 /capsule | 61 | |
| 04 | Adp Magnesio Marino B6 30 caps · 1/1 requirements | PromoFarma | €3.64 | €0.121 /capsule | 60 |
| 05 | Polaris Citrato Magnesio 600mg 60 tabletas · 3/3 requirements | PromoFarma | €13.79 | €0.230 /capsule | 56 |
| 06 | PromoFarma | €12.70 | €0.212 /capsule | 55 | |
| 07 | PromoFarma | €11.20 | €0.187 /capsule | 53 | |
| 08 | PromoFarma | €10.74 | €0.179 /capsule | 52 | |
| 09 | PromoFarma | €4.26 | €0.142 /capsule | 52 | |
| 10 | Polaris Magnesio 1000 Mg 100Tabs · 1/3 requirements | PromoFarma | €16.20 | €0.162 /capsule | 50 |
| 11 | PromoFarma | €18.58 | €0.221 /capsule | 48 | |
| 12 | NUTRICIÓN MÉDICA Magnesio Nm 90 Capsulas · 1/3 requirements | PromoFarma | €20.35 | €0.226 /capsule | 48 |
| 13 | PromoFarma | €31.99 | €0.267 /capsule | 46 | |
| 14 | Cefak Cefavit D3 K2 Magnesio 60 cápsulas · 1/3 requirements | PromoFarma | €22.69 | €0.378 /capsule | 45 |
| 15 | PromoFarma | €14.19 | €0.473 /capsule | 44 |
No product makes that cut
Out of the 15 in this table, none meets every filter that is currently set at the same time.
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).
| Ingredient | PromoFarma | All other stores |
|---|---|---|
| MagnesiumEvidence-backed dose: from 375 mg per serving | 600 mg2 of 15 contain it · 2 reach the dose | 760 mg7 of 139 contain it · 5 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 67 % more per capsule than All other stores (€0.187/capsule against €0.112/capsule, 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: capsules per pack (median), chemical form of the active ingredient.
| Factor | PromoFarma | All other stores |
|---|---|---|
| Cost of one effective dosePrice per capsule 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. | €0.230 | €0.164 |
| Capsules per pack (median)All other stores sells bigger packs, and a big pack spreads the same tub, the same label and the same shipping over more capsules. Part of the price gap per capsule is this and not a discount: comparing one store’s small pack with the other’s large one inflates the gap. | 60 caps. | 120 caps. |
| Chemical form of the active ingredientPromoFarma: Citrate (2). All other stores: Citrate (26), Malato (5). The form changes the manufacturing cost and the evidence behind it, so two tubs of the same ingredient at different prices may not be the same product. | Citrate 2 | Citrate 26 · Malato 5 |
| Median rating at the storeBased on 22 reviews at PromoFarma and 2,977 at All other stores. These are the store’s own ratings, which is judge and party: they help spot a product that arrives damaged or tastes awful, not decide which formula is better. | 4.8/5 | 5/5 |
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 magnesium comparison: the only thing removed here is the products that do not meet the criterion above. How it is calculated.
Questions about this magnesium selection
Answered with the data on this page
- Which is the best magnesium in this selection?
- Santiveri Santiveres Cloruro de Magnesio 200 caps from PromoFarma, with 80 points out of 100 at €0.042/capsule. The 15 magnesium products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.187/capsule, 55 % above the median of the 13 stores compared (€0.121/capsule).
- Which is the cheapest per capsule?
- Vbyotics Magmax Magnesio Citrato 500mg 100caps from PromoFarma, at €0.119/capsule (100 capsules pack for €11.89). It is at verification level 1 out of 4: price is only 35 % of the mark.
- How was this selection made?
- The 15 magnesium products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.187/capsule, 55 % above the median of the 13 stores compared (€0.121/capsule). The order within the table is the usual score: 35 % price per capsule 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 magnesium
Same dataset, another question