Which is the cheapest vitamin B12 across the two stores?

Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos from Amazon, at €0.025/capsule (400 capsules pack for €9.95), at verification level 1 out of 4.

Why don’t Amazon and PromoFarma cost the same?

PromoFarma costs 200 % more per capsule than Amazon (€0.300/capsule against €0.100/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). Amazon 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.

Which of the two stores scores better?

Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos from Amazon, with 75 out of 100. The score is 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, and it is computed without looking at affiliate links. Prices from October 15, 2026.

Home / Vitamin B12 / Amazon vs PromoFarma

Head to head · data from October 15, 2026

Amazon or PromoFarma for vitamin B12: which is better value per capsule

The short answer. For vitamin B12, Amazon lists 64 products and PromoFarma another 15. By price per capsule, Amazon’s median is €0.100/capsule and PromoFarma’s is €0.300/capsule. The highest scoring across both catalogues is Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos from Amazon, with 75 out of 100 at €0.025/capsule. Neither has products at verification level 4: for vitamin B12 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 capsule 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

Amazon

64 vitamin B12 products

€0.100/capsulemedian

From €0.025/capsule to €0.372/capsule. 0 at verification level 4 and 0 at level 3.

Its best score: Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos, 75/100 at €0.025/capsule.

PromoFarma

15 vitamin B12 products

€0.300/capsulemedian

From €0.086/capsule to €0.617/capsule. 0 at verification level 4 and 0 at level 3.

Its best score: Hivital Foods Vitamina B12 Metilcobalamina 1000 mcg 200 comprimidos (Más de 6 meses), 55/100 at €0.086/capsule.

Amazon against PromoFarma, figure by figure

The same numbers for both

Amazon and PromoFarma for vitamin B12, with prices from October 15, 2026
Figure	Amazon	PromoFarma
Products compared	64	15
Median per capsule	€0.100/capsule	€0.300/capsule
Cheapest per capsule	€0.025/capsule	€0.086/capsule
Dearest per capsule	€0.372/capsule	€0.617/capsule
Best score	75	55
Level 4 (certification backed by a third party)	0 of 64	0 of 15
Level 3 (the brand’s own lab report)	0 of 64	0 of 15

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.

Why one is cheaper than the other

Factor by factor, with both stores’ data

PromoFarma costs 200 % more per capsule than Amazon (€0.300/capsule against €0.100/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).

Where the price difference between Amazon and PromoFarma for vitamin B12 comes from
Factor	Amazon	PromoFarma
Capsules per pack (median)Amazon 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.	120 caps.	60 caps.

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 79 products from both stores

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Products sorted by score (recommended)
#	Product	Store
01	Vitamina B12 500 µg con Ácido Fólico – 400 ComprimidosBest value	Amazonfree delivery from €35	€9.95	€0.025 /capsule	75
02	Vitamina B12 400 Tabletas de Metilcobalamina Bioacitva · 2 flavours	Amazonfree delivery from €35	€9.99	€0.025 /capsule	74
03	Vitamina B12 1000 mcg · 500 comprimidos	Amazonfree delivery from €35	€12.95	€0.026 /capsule	73
04	Vitamina B12 500 mcg · 365 comprimidos	Amazonfree delivery from €35	€9.99	€0.027 /capsule	71
05	Vitamina B12-1000 µg · 365 cápsulas	Amazonfree delivery from €35	€11.18	€0.031 /capsule	68
06	Bandini Bandini® Vitamina B12 1.000mcg 450 Comprimidos	Amazonfree delivery from €35	€14.99	€0.033 /capsule	66
07	Vitastrong Vitamina B12 1000mcg Vegana, 475 Comprimidos, 1 al Día 15+ Meses	Amazonfree delivery from €35	€15.98	€0.034 /capsule	66
08	Vitamina B12 Vegana 1000 mcg 450 Comprimidos	Amazonfree delivery from €35	€15.19	€0.034 /capsule	65
09	Vitaminalia Vitamina B12 Metilcobalamina 2000mcg · 365 tabletas	Amazonfree delivery from €35	€12.99	€0.036 /capsule	64
10	Bandini Bandini® Vitamina B12 Vegana 365 Comprimidos	Amazonfree delivery from €35	€13.90	€0.038 /capsule	63
11	Cerveza con Vitamina B12 · 250 comprimidos	Amazonfree delivery from €35	€9.87	€0.039 /capsule	62
12	Vitamina B12 1000mcg · 450 comprimidos	Amazonfree delivery from €35	€17.97	€0.040 /capsule	61
13	Bandini Bandini® Vitamina B12 y Ácido Fólico · 400 comprimidos	Amazonfree delivery from €35	€16.90	€0.042 /capsule	60
14	Vitamina B12 Masticable 1000mcg · 400 comprimidos	Amazonfree delivery from €35	€17.99	€0.045 /capsule	59
15	Vitamina B12-1000 mcg · 365 tabletas	Amazonfree delivery from €35	€16.99	€0.047 /capsule	58
16	Nutravita Vitamina B12 1000mcg 365 Tabletas Veganas	Amazonfree delivery from €35	€17.99	€0.049 /capsule	57
17	Vitamina B12 1000 mcg y Ácido Fólico 400 mcg · 400 comprimidos	Amazonfree delivery from €35	€21.19	€0.053 /capsule	56
18	Hivital Foods Vitamina B12 Metilcobalamina 1000 mcg 200 comprimidos (Más de 65.0 (1) · 2/2 requirements	PromoFarma	€17.29	€0.086 /capsule	55
19	Nutri 365 Cápsulas Vitamina B12 con Ácido Fólico	Amazonfree delivery from €35	€20.98	€0.057 /capsule	55
20	Vitamina B12 1000mcg + 400mcg Ácido fólico · 200 tabletas	Amazonfree delivery from €35	€11.89	€0.059 /capsule	54
21	Bicentury Vitamina B12-1000 mcg de Vitamina B12 de · 240 comprimidos	Amazonfree delivery from €35	€14.69	€0.061 /capsule	54
22	400µg Con Vitamina B12 PiùLife, 160 Comprimidos, 1 Al Día	Amazonfree delivery from €35	€9.99	€0.062 /capsule	54
23	Vitamina B12 y Ácido Fólico Quatrefolic® - 180 comprimidos	Amazonfree delivery from €35	€11.99	€0.067 /capsule	53
24	HSN Vitamina B12 Metilcobalamina 1000mcg - 120 Cápsulas Vegetales	Amazonfree delivery from €35	€8.40	€0.070 /capsule	52
25	HSN Vitamina B12 Cianocobalamina 1000 MCG · 120 cápsulas	Amazonfree delivery from €35	€8.90	€0.074 /capsule	51
26	vitamina B12 · Reduce Cansancio · 160 comprimidos	Amazonfree delivery from €35	€11.90	€0.074 /capsule	51
27	HSN Vitamina B12 Metilcobalamina 500mcg - 120 Tabletas	Amazonfree delivery from €35	€8.99	€0.075 /capsule	51
28	SANON Vitamina B12 365 cápsulas	Amazonfree delivery from €35	€28.99	€0.079 /capsule	51
29	NOVADIET Vitamina B12 100 Mcg 120 caps · 1/2 requirements	PromoFarma	€11.39	€0.095 /capsule	49
30	Solgar Vitamina B12 100 µg · 100 comprimidos	Amazonfree delivery from €35	€9.10	€0.091 /capsule	49
31	Vitamina B12 1000 mcg con Ácido Fólico 375 mg · 180 comprimidos	Amazonfree delivery from €35	€16.95	€0.094 /capsule	49
32	vitaminas B NATURE LOVE® · 180 cápsulas	Amazonfree delivery from €35	€16.99	€0.094 /capsule	49
33	Vitamina B12 Metilcobalamina 1000 mcg. 200 comprimidos VEGANOS	Amazonfree delivery from €35	€18.87	€0.094 /capsule	49
34	HSN Vitamina B12 Adenosilcobalamina 1000mcg - 120 Cápsulas Vegetales	Amazonfree delivery from €35	€11.90	€0.099 /capsule	48
35	Vitamina B12 1000µg Alta Dosis · 60 cápsulas	Amazonfree delivery from €35	€5.99	€0.100 /capsule	48
36	Igennus Super Vitamina B12 Sublingual 1000mcg, 180 Comprimidos	Amazonfree delivery from €35	€17.99	€0.100 /capsule	48
37	Solgar Vitamina B12 1000 mcg Cianocobalamina · 250 comprimidos	Amazonfree delivery from €35	€25.99	€0.104 /capsule	48
38	Bandini® Bisglicinato de Magnesio + Vitamina · 180 cápsulas	Amazonfree delivery from €35	€19.90	€0.111 /capsule	48
39	Vitamina B12 · 120 cápsulas	Amazonfree delivery from €35	€15.60	€0.130 /capsule	46
40	Vitamina B12 1000 mcg · 100 cápsulas	Amazonfree delivery from €35	€12.99	€0.130 /capsule	46
41	Life Extension Bioactive Life Extension · 90 cápsulas	Amazonfree delivery from €35	€12.11	€0.135 /capsule	46
42	Solgar Vitamina B12 · Aporte de Energía I100 Comprimidos	Amazonfree delivery from €35	€13.89	€0.139 /capsule	46
43	400 mcg con Vitamina D3 · 120 cápsulas	Amazonfree delivery from €35	€17.10	€0.143 /capsule	46
44	Vitamina B12 1000 µg Cianocobalamina · 60 cápsulas	Amazonfree delivery from €35	€8.90	€0.148 /capsule	46
45	Soria Natural Vitamina B12 1000μg · 60 comprimidos	Amazonfree delivery from €35	€8.95	€0.149 /capsule	45
46	HSN Vitamina B12 Liposomal 500mcg Liposovit® · 120 cápsulas	Amazonfree delivery from €35	€17.90	€0.149 /capsule	45
47	Hierro 29mg con Vitamina C · 45 cápsulas	Amazonfree delivery from €35	€7.16	€0.159 /capsule	45
48	Vitamina B12 PLUS Vegavero · 180 cápsulas	Amazonfree delivery from €35	€29.90	€0.166 /capsule	45
49	Vitamina B12 Vegana 2000mcg Metilcobalamina y · 120 comprimidos	Amazonfree delivery from €35	€19.90	€0.166 /capsule	45
50	Lamberts Vitamina B12 100 µg como Metilcobalamina · 100 tabletas	Amazonfree delivery from €35	€17.11	€0.171 /capsule	45
51	Solgar Vitamina B12 500 µg · 50 cápsulas	Amazonfree delivery from €35	€8.83	€0.177 /capsule	45
52	MIAC Vitamina B12. Metilcobalamina B12 60 Cápsulas. 1000 mcg.	Amazonfree delivery from €35	€11.99	€0.200 /capsule	44
53	Vitamina B12 · 1000 µg · 60 cápsulas	Amazonfree delivery from €35	€12.81	€0.213 /capsule	44
54	Pure Encapsulations Vitamina B12 · 90 Cápsulas Vegetales	Amazonfree delivery from €35	€19.15	€0.213 /capsule	44
55	Vitamintrend Vitamina B12 500 µg + Ácido fólico 100 µg · 30 tabletas	Amazonfree delivery from €35	€6.95	€0.232 /capsule	43
56	SURA VITASAN Vitamina B12 500 μg 100 Cápsulas	Amazonfree delivery from €35	€23.71	€0.237 /capsule	43
57	DietMed Vitamina B12 2500 µg · 60 cápsulas	Amazonfree delivery from €35	€14.37	€0.239 /capsule	43
58	Vitamina B12 Liposomal · 90 cápsulas	Amazonfree delivery from €35	€21.95	€0.244 /capsule	43
59	Supradyn Expert Vitamina B12 1000 µg, 90 Comprimidos Bucodispersables	Amazonfree delivery from €35	€21.92	€0.244 /capsule	43
60	Sanon Sanon Vitamina B12 60 Cápsulas De 500Mg 60 g	Amazonfree delivery from €35	€14.80	€0.247 /capsule	43
61	Vita B12 1.000 µg 60 Cápsulas	Amazonfree delivery from €35	€14.90	€0.248 /capsule	43
62	Vitamina B12 Vegana 1000 µg · 60 cápsulas	Amazonfree delivery from €35	€14.90	€0.248 /capsule	43
63	Naturmil Vitamina B12 2500ug 60caps4.0 (2) · 1/2 requirements	PromoFarma	€16.19	€0.270 /capsule	43
64	Equisalud Holovit Vitamina B12 Activa 1.000 Μg 50 caps	PromoFarma	€12.89	€0.258 /capsule	43
65	Doctor's Best Fully Doctor's Best · Fully Active B12 · 60 cápsulas	Amazonfree delivery from €35	€16.18	€0.270 /capsule	43
66	Nat&Form Nat & Form Vitamina B12 1 mg 30 Perlas · 1/2 requirements	PromoFarma	€10.02	€0.334 /capsule	43
67	Vegano para Confort de Espalda y Piernas · 60 cápsulas	Amazonfree delivery from €35	€20.90	€0.348 /capsule	42
68	Dr. Giorgini B12 Plus 60 caps	PromoFarma	€20.86	€0.348 /capsule	42
69	Solgar Methylcobalamin Vitamina B12 \| 30 Cápsulas	Amazonfree delivery from €35	€10.99	€0.366 /capsule	42
70	Hierro Liposomado 30mg · 60 cápsulas	Amazonfree delivery from €35	€22.32	€0.372 /capsule	42
71	Natur Folato B12 Extra 30 caps	PromoFarma	€11.80	€0.393 /capsule	42
72	SALUGEA Hierro + B12 60caps	PromoFarma	€36.99	€0.617 /capsule	41
73	INTEGRALIA Vitamina B12 30caps4.7 (3) · 0/2 requirements	PromoFarma	€6.09	€0.203 /capsule	39
74	Espadiet Valeriana + Lupulo + B12 60 caps · 0/2 requirements	PromoFarma	€12.33	€0.205 /capsule	39
75	BE-LIFE Vitaminas B12 Plus 90 caps · 0/2 requirements	PromoFarma	€23.09	€0.257 /capsule	39
76	TONGIL Estado Puro Metil B12 Ácido Fólico 60 caps · 0/2 requirements	PromoFarma	€18.00	€0.300 /capsule	38
77	Airbiotic Vitamina B12 Ab 1000 mg 60 caps · 0/2 requirements	PromoFarma	€21.59	€0.360 /capsule	38
78	Cantabria Labs B12 Nm 20 caps · 0/2 requirements	PromoFarma	€8.96	€0.448 /capsule	37
79	Enzime Sabinco B6 + B12 + Ácido Fólico Metiladas 60caps · 0/2 requirements	PromoFarma	€31.29	€0.521 /capsule	37

79 products in this table

Questions about Amazon and PromoFarma for vitamin B12

Answered with the data on this page

Amazon or PromoFarma for vitamin B12?: On price per capsule, Amazon: its median is €0.100/capsule against €0.300/capsule at PromoFarma, which is 200 % 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 vitamin B12 across the two stores?: Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos from Amazon, at €0.025/capsule (400 capsules pack for €9.95), at verification level 1 out of 4.
Why don’t Amazon and PromoFarma cost the same?: PromoFarma costs 200 % more per capsule than Amazon (€0.300/capsule against €0.100/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). Amazon 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.
Which of the two stores scores better?: Vitamina B12 500 µg con Ácido Fólico – 400 Comprimidos from Amazon, with 75 out of 100. The score is 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, and it is computed without looking at affiliate links. Prices from October 15, 2026.

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