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Amazon or Life Pro for whey protein: which is better value per kg

The short answer. For whey protein, Amazon lists 44 products and Life Pro another 6. By price per kg, Amazon’s median is €41.98/kg and Life Pro’s is €37.18/kg. The highest scoring across both catalogues is Bulk Basic Proteína de Suero en Polvo | Vainilla | 1,25 kg | 41 Raciones | Hasta 18 g de Proteína | Bajo en Azúcar | Fórmula de Rápida Absorción | Apoya el Crecimiento y la Recuperación Muscular from Amazon, with 75 out of 100 at €21.24/kg. 1 products from Amazon and 0 from Life Pro reach verification level 4.

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

Life Pro

6 whey protein products

€37.18/kgmedian

From €34.05/kg to €40.75/kg. 0 at verification level 4 and 0 at level 3.

Its best score: Life Pro WHEY 2KG, 64/100 at €34.05/kg.

Amazon against Life Pro, figure by figure

The same numbers for both

Amazon and Life Pro for whey protein, with prices from October 31, 2026
FigureAmazonLife Pro
Products compared446
Median per kg€41.98/kg€37.18/kg
Cheapest per kg€21.24/kg€34.05/kg
Dearest per kg€79.17/kg€40.75/kg
Best score7564
Level 4 (certification backed by a third party)1 of 440 of 6
Level 3 (the brand’s own lab report)0 of 440 of 6

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).

Ingredients and dose per serving at Amazon and Life Pro, for whey protein
IngredientAmazonLife Pro
Whey protein concentrateEvidence-backed dose: from 20 g per serving30.5 g44 of 44 contain it · 4 reach the dose—6 of 6 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

Amazon costs 13 % more per kg than Life Pro (€41.98/kg against €37.18/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.

Where the price difference between Amazon and Life Pro for whey protein comes from
FactorAmazonLife Pro
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: Life Pro is cheaper both ways.€1.119€0.992
Pack size (median)Life Pro 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.1 kg1.6 kg
Different brands in the catalogueLife Pro mostly sells one brand, Life Pro: 100 % of its catalogue in this category. Amazon spreads its own across 23 brands. A store selling its own brand skips the manufacturer’s margin and can cut the price without touching the formula; a reseller pays that margin and passes it on, and in exchange carries brands the other does not sell.23 (23 % Desconocida)1 (100 % Life Pro)

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 50 products from both stores

Filter by store to see only one

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Products sorted by score (recommended)
#ProductStoreVerification
01Amazonfree delivery from €35€26.55€21.24 /kg≈ €28.32 /kg of protein No third-party seal75
02Amazonfree delivery€39.99€47.95 /kg≈ €63.93 /kg of protein Verified73
03
Whey Protein 1KG
Amazonfree delivery from €35€23.43€23.43 /kg≈ €31.24 /kg of protein No third-party seal72
04Amazonfree delivery€63.60€25.44 /kg≈ €33.92 /kg of protein No third-party seal70
05Amazonfree delivery€69.95€27.98 /kg≈ €37.31 /kg of protein No third-party seal68
06Amazonfree delivery from €35€27.99€27.99 /kg≈ €37.32 /kg of protein No third-party seal68
07Amazonfree delivery from €35€29.90€29.90 /kg≈ €39.87 /kg of protein No third-party seal67
08Amazonfree delivery€149.99€30.00 /kg≈ €40.00 /kg of protein No third-party seal66
09Amazonfree delivery from €35€30.37€30.68 /kg≈ €40.91 /kg of protein No third-party seal66
10Amazonfree delivery€62.12€31.06 /kg≈ €41.41 /kg of protein No third-party seal66
11Amazonfree delivery€63.00€31.50 /kg≈ €42.00 /kg of protein No third-party seal65
12Amazonfree delivery from €35€19.45€32.42 /kg≈ €43.23 /kg of protein No third-party seal65
13Amazonfree delivery from €35€16.38€32.76 /kg≈ €43.68 /kg of protein No third-party seal65
14
Life Pro WHEY 2KG · 4 flavours4.8 (10)good price
Life Profree delivery€68.09€34.05 /kg≈ €45.40 /kg of protein No third-party seal64
15Amazonfree delivery€71.30€35.65 /kg≈ €47.53 /kg of protein No third-party seal63
16Life Profree delivery€65.36€36.31 /kg≈ €48.41 /kg of protein No third-party seal63
17Amazonfree delivery from €35€19.79€39.58 /kg≈ €52.77 /kg of protein No third-party seal61
18Amazonfree delivery from €35€19.90€39.80 /kg≈ €53.07 /kg of protein No third-party seal61
19
Life Pro WHEY DRAGON BALL SUPER EDICIÓN LIMITADA VEGETA 900G · 2 flavours4.8 (8)good price
Life Profree delivery€36.27€40.30 /kg≈ €53.73 /kg of protein No third-party seal61
20Amazonfree delivery from €35€29.95€39.93 /kg≈ €53.24 /kg of protein No third-party seal61
21Amazonfree delivery€35.95€39.94 /kg≈ €53.25 /kg of protein No third-party seal61
22Amazonfree delivery from €35€20.55€41.10 /kg≈ €54.80 /kg of protein No third-party seal61
23Amazonfree delivery€82.50€41.25 /kg≈ €55.00 /kg of protein No third-party seal61
24
iO.GENIX WHEY 80 PROFESSIONAL 2 KG
Amazonfree delivery€83.95€41.98 /kg≈ €55.97 /kg of protein No third-party seal60
25Amazonfree delivery€38.14€42.38 /kg≈ €56.51 /kg of protein No third-party seal60
26Amazonfree delivery€38.90€43.22 /kg≈ €57.63 /kg of protein No third-party seal60
27Amazonfree delivery€43.90€43.90 /kg≈ €58.53 /kg of protein No third-party seal60
28Amazonfree delivery€44.00€44.00 /kg≈ €58.67 /kg of protein No third-party seal60
29Amazonfree delivery€44.90€44.90 /kg≈ €59.87 /kg of protein No third-party seal60
30Amazonfree delivery€89.90€44.95 /kg≈ €59.93 /kg of protein No third-party seal60
31Amazonfree delivery€79.99€49.38 /kg≈ €65.84 /kg of protein No third-party seal58
32Amazonfree delivery€50.90€50.90 /kg≈ €67.87 /kg of protein No third-party seal58
33Amazonfree delivery from €35€32.41€54.02 /kg≈ €72.03 /kg of protein No third-party seal57
34Amazonfree delivery€44.95€56.19 /kg≈ €74.92 /kg of protein No third-party seal57
35Amazonfree delivery€51.90€57.16 /kg≈ €76.21 /kg of protein No third-party seal57
36
BioTechUSA 100% Pure Whey · 400 g · 2 flavours
Amazonfree delivery from €35€22.90€57.25 /kg≈ €76.33 /kg of protein No third-party seal57
37Amazonfree delivery€58.90€58.90 /kg≈ €78.53 /kg of protein No third-party seal56
38
AMIX Proteína Whey · 2 flavours
Amazonfree delivery€63.90€63.90 /kg≈ €85.20 /kg of protein No third-party seal55
39Amazonfree delivery from €35€9.50€79.17 /kg≈ €105.56 /kg of protein No third-party seal53

50 products in this table

Questions about Amazon and Life Pro for whey protein

Answered with the data on this page

Amazon or Life Pro for whey protein?

On price per kg, Life Pro: its median is €37.18/kg against €41.98/kg at Amazon, which is 13 % dearer. The median does not decide on its own: most of the rest of the mark is certification, and there Amazon has 1 products at level 4 and Life Pro has 0.

Which is the cheapest whey protein across the two stores?

Bulk Basic Proteína de Suero en Polvo | Vainilla | 1,25 kg | 41 Raciones | Hasta 18 g de Proteína | Bajo en Azúcar | Fórmula de Rápida Absorción | Apoya el Crecimiento y la Recuperación Muscular from Amazon, at €21.24/kg (1250 g pack for €26.55), at verification level 1 out of 4.

Why don’t Amazon and Life Pro cost the same?

Amazon costs 13 % more per kg than Life Pro (€41.98/kg against €37.18/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. Price per kg and price per dose point to the same store, so the dose does not erase the label difference: Life Pro is cheaper both ways. Life Pro 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?

Bulk Basic Proteína de Suero en Polvo | Vainilla | 1,25 kg | 41 Raciones | Hasta 18 g de Proteína | Bajo en Azúcar | Fórmula de Rápida Absorción | Apoya el Crecimiento y la Recuperación Muscular from Amazon, with 75 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.

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