Home / Essential amino acids (EAA) / Amazon vs PromoFarma
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Amazon or PromoFarma for EAA: which is better value per kg
The short answer. For EAA, Amazon lists 28 products and PromoFarma another 13. By price per kg, Amazon’s median is €65.77/kg and PromoFarma’s is €71.97/kg. The highest scoring across both catalogues is HSN Aminoácidos Esenciales en Polvo Sin Sabor | 1Kg | 9 Aminoácidos Esenciales (EAA's) en Forma Libre | Sin Edulcorante | No Contiene Dosificador | No-GMO, Vegano, Sin Gluten from Amazon, with 76 out of 100 at €35.90/kg. Neither has products at verification level 4: for EAA the ceiling today is a lab report published by the brand itself, and that is not a certification.
Both stores measured on the same criterion: price per kg and certification verification level. There is no overall winner because there isn’t one: one can win on price and the other on certification, and here you see both separately.
† 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.
Both stores at a glance
28 EAA products
€65.77/kgmedian
From €35.90/kg to €129.37/kg. 0 at verification level 4 and 0 at level 3.
Its best score: HSN Aminoácidos Esenciales en Polvo Sin Sabor | 1Kg | 9 Aminoácidos Esenciales (EAA's) en Forma Libre | Sin Edulcorante | No Contiene Dosificador | No-GMO, Vegano, Sin Gluten, 76/100 at €35.90/kg.
13 EAA products
€71.97/kgmedian
From €56.43/kg to €184.97/kg. 0 at verification level 4 and 0 at level 3.
Its best score: Bigman Eaa + Electrolytes Naranja 300 g, 65/100 at €56.43/kg.
Amazon against PromoFarma, figure by figure
The same numbers for both
| Figure | Amazon | PromoFarma |
|---|---|---|
| Products compared | 28 | 13 |
| Median per kg | €65.77/kg | €71.97/kg |
| Cheapest per kg | €35.90/kg | €56.43/kg |
| Dearest per kg | €129.37/kg | €184.97/kg |
| Best score | 76 | 65 |
| Level 4 (certification backed by a third party) | 0 of 28 | 0 of 13 |
| Level 3 (the brand’s own lab report) | 0 of 28 | 0 of 13 |
The median is not the price you will pay. It is the midpoint of that store’s catalogue in this category, and it tells you whether a store is dear or cheap overall. For buying, the specific row in the table below is what counts.
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 | Amazon | PromoFarma |
|---|---|---|
| Essential amino acidsEvidence-backed dose: from 10 g per serving | 9 g28 of 28 contain it · 0 reach the dose | —13 of 13 contain it · none publishes 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 9 % more per kg than Amazon (€71.97/kg against €65.77/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).
| Factor | Amazon | PromoFarma |
|---|---|---|
| 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: Amazon is cheaper both ways. | €0.658 | €0.720 |
| Pack size (median)Amazon 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. | 400 g | 350 g |
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.
All 41 products from both stores
Filter by store to see only one
Filter and sort
| # | Product | Store | |||
|---|---|---|---|---|---|
| 01 | Amazonfree delivery | €35.90 | €35.90 /kg | 76 | |
| Amazonfree delivery from €35 | €19.90 | €39.80 /kg | 74 | ||
| 02 | Amazonfree delivery from €35 | €18.90 | €37.80 /kg | 75 | |
| 03 | Amazonfree delivery from €35 | €22.90 | €45.80 /kg | 70 | |
| 04 | Amazonfree delivery from €35 | €24.50 | €49.00 /kg | 68 | |
| 05 | Warrior EAA Aminoácidos Polvo 360 g, Esenciales · 2 flavours | Amazonfree delivery from €35 | €18.99 | €52.75 /kg | 67 |
| 06 | Amazonfree delivery from €35 | €14.49 | €53.67 /kg | 66 | |
| 07 | Amazonfree delivery from €35 | €27.90 | €55.80 /kg | 66 | |
| 08 | Amazonfree delivery from €35 | €27.98 | €55.96 /kg | 66 | |
| 09 | Amazonfree delivery from €35 | €22.00 | €56.41 /kg | 66 | |
| 10 | PromoFarma | €16.93 | €56.43 /kg | 65 | |
| 11 | Amazonfree delivery from €35 | €28.99 | €57.98 /kg | 65 | |
| 12 | Amazonfree delivery from €35 | €23.90 | €59.75 /kg | 64 | |
| 13 | MASmusculo 9 Aminoácidos Esenciales · 2 flavours | Amazonfree delivery from €35 | €18.99 | €63.30 /kg | 63 |
| 14 | Amazonfree delivery from €35 | €31.66 | €63.32 /kg | 63 | |
| 15 | PromoFarma | €22.48 | €64.23 /kg | 63 | |
| 16 | GEN GERMAN ELITE NUTRITION EAA en Polvo · 3 flavours | Amazonfree delivery from €35 | €34.99 | €65.77 /kg | 63 |
| 17 | Amazonfree delivery from €35 | €32.99 | €65.98 /kg | 63 | |
| 18 | PromoFarma | €32.90 | €65.80 /kg | 63 | |
| 19 | Amazonfree delivery from €35 | €26.90 | €67.25 /kg | 62 | |
| 20 | Amazonfree delivery from €35 | €34.99 | €69.98 /kg | 62 | |
| 21 | PromoFarma | €24.79 | €70.83 /kg | 62 | |
| 22 | PromoFarma | €24.91 | €71.17 /kg | 62 | |
| 23 | Amazonfree delivery from €35 | €23.69 | €72.89 /kg | 61 | |
| 24 | PromoFarma | €22.09 | €73.63 /kg | 61 | |
| 25 | ESN EAA+, Manzana verde, 400 g · 2 flavours | Amazonfree delivery from €35 | €29.90 | €74.75 /kg | 61 |
| 26 | PromoFarma | €26.49 | €75.69 /kg | 61 | |
| 27 | PromoFarma | €27.70 | €79.14 /kg | 60 | |
| 28 | PromoFarma | €26.17 | €80.52 /kg | 60 | |
| 29 | Amazonfree delivery from €35 | €31.90 | €81.80 /kg | 60 | |
| 30 | Amazonfree delivery from €35 | €9.90 | €83.19 /kg | 59 | |
| 31 | Quamtrax Nutrition EAA M.A.P. · 2 flavours | Amazonfree delivery from €35 | €31.90 | €85.29 /kg | 59 |
| 32 | Amazonfree delivery from €35 | €30.99 | €86.08 /kg | 59 | |
| 33 | PromoFarma | €24.91 | €71.17 /kg | 59 | |
| 34 | PromoFarma | €25.19 | €71.97 /kg | 58 | |
| 35 | BioTechUSA Biotech Usa Amino Ácidos Esenciales Eaa Zero 350 g · 1/2 requirements | PromoFarma | €25.49 | €72.83 /kg | 58 |
| 36 | Amazonfree delivery from €35 | €33.90 | €96.86 /kg | 57 | |
| 37 | Amazonfree delivery from €35 | €32.99 | €109.97 /kg | 56 | |
| 38 | Amazonfree delivery from €35 | €30.67 | €122.68 /kg | 55 | |
| 39 | Amazonfree delivery | €45.02 | €129.37 /kg | 55 | |
| 40 | Nutrisport Aminoácidos Esenciales Polvo 300g · 1/2 requirements | PromoFarma | €55.49 | €184.97 /kg | 49 |
No product makes that cut
Out of the 41 in this table, none meets every filter that is currently set at the same time.
41 products in this table
Questions about Amazon and PromoFarma for EAA
Answered with the data on this page
- Amazon or PromoFarma for EAA?
- On price per kg, Amazon: its median is €65.77/kg against €71.97/kg at PromoFarma, which is 9 % dearer. The median does not decide on its own: most of the rest of the mark is certification, and there Amazon has 0 products at level 4 and PromoFarma has 0.
- Which is the cheapest EAA across the two stores?
- HSN Aminoácidos Esenciales en Polvo Sin Sabor | 1Kg | 9 Aminoácidos Esenciales (EAA's) en Forma Libre | Sin Edulcorante | No Contiene Dosificador | No-GMO, Vegano, Sin Gluten from Amazon, at €35.90/kg (1000 g pack for €35.90), at verification level 1 out of 4.
- Why don’t Amazon and PromoFarma cost the same?
- PromoFarma costs 9 % more per kg than Amazon (€71.97/kg against €65.77/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). Price per kg and price per dose point to the same store, so the dose does not erase the label difference: Amazon is cheaper both ways. Amazon 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?
- HSN Aminoácidos Esenciales en Polvo Sin Sabor | 1Kg | 9 Aminoácidos Esenciales (EAA's) en Forma Libre | Sin Edulcorante | No Contiene Dosificador | No-GMO, Vegano, Sin Gluten from Amazon, with 76 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 15, 2026.
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