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Which selenium should you buy · data from

The best selenium of 2026

Needed for the thyroid and antioxidant enzymes, in very small amounts: 55 micrograms a day. The margin before overdoing it is narrow.

from €0.111/capsulemedian €0.224up to €0.833/capsule

What selenium does, at what dose and on what evidence

† 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.

Nothing is claimed about the formula in this category. None of these stores publishes how much active ingredient each dose carries, so the score comes from the price per capsule and the verification level, and nobody appears here as well or badly dosed: we do not have the data and we do not make it up.

Cheapest per capsule

Hivital Selenio 100mcg 180 Cápsulas

€0.111/capsuleNo third-party seal

€0.111 per capsule: the cheapest of those that meet the category's requirements and are not underdosed.

At DosFarma · see how its score breaks down

Best value for moneyOur pick

Swanson L-seleniometionina (100mcg selenio) 200 cápsulas

€0.037/capsuleNo third-party seal

Score 75 out of 100: the highest mark, with 35 % of the weight on price per capsule.

At HSN · see how its score breaks down

Full comparison

33

products compared

from €0.037 to €0.833

per capsule

0

at verified level 4

Filter and sort
Only
Products sorted by score (recommended)
#ProductStore
01
Swanson L-seleniometionina (100mcg selenio) 200 cápsulas4.8 (10) · 1/2 requirementsBest value
HSN+€3.99 delivery€7.49€0.037 /capsule75
02DosFarma+€3.99 delivery€16.99€0.047 /capsule68
03
Sotya Antioxidante C+E+Selenio 500mg 100 comprimidos5.0 (1) · 0/2 requirements
DosFarma+€3.99 delivery€3.99€0.040 /capsule68
04
Hivital Selenio 100mcg 180 Cápsulas · 2/2 requirements
DosFarma+€3.99 delivery€19.99€0.111 /capsule57
05DosFarma+€3.99 delivery€24.99€0.068 /capsule54
06DosFarma+€3.99 delivery€27.99€0.070 /capsule54
07
Solaray Sin Levaduras Selenio 200 Mcg 90 Cápsulas · 2/2 requirements
DosFarma+€3.99 delivery€14.99€0.167 /capsule53
08DosFarma+€3.99 delivery€16.99€0.170 /capsule53
09Holland & Barrett+€4.99 delivery€19.79€0.165 /capsule52
10
Lamberts Selenio 200mcg 60 Tabletas · 2/2 requirements
DosFarma+€3.99 delivery€15.43€0.257 /capsule50
11
Solgar Selenio 200mcg (sin levadura) 100 comprimidos · 2/2 requirements
DosFarma+€3.99 delivery€29.99€0.300 /capsule49
12
Pharma Nord ActiveComplex® Selenio+Zinc 100mcg 60 Comprimidos5.0 (5) · 2/2 requirements
DosFarma+€3.99 delivery€19.99€0.333 /capsule49
13
Lamberts Selenium 200mcg 60 Tabletas · 1/2 requirements
PromoFarma€13.29€0.221 /capsule46
14
Alfa Herbal L Seleniometionina 100 caps · 0/2 requirements
PromoFarma€13.36€0.134 /capsule45
15
Sura Vitasan Selenio Pvh Quelado 100caps · 0/2 requirements
PromoFarma€14.59€0.146 /capsule44
16
CFN Selenio Metionina 90 caps · 0/2 requirements
PromoFarma€13.76€0.153 /capsule44
17PromoFarma€17.69€0.295 /capsule44
18PromoFarma€18.40€0.307 /capsule43
19DosFarma+€3.99 delivery€20.99€0.420 /capsule43
20PromoFarma€8.33€0.347 /capsule43
21
Cien por Cien Natural 100% Natural Selenio 90 caps · 0/2 requirements
PromoFarma€15.57€0.173 /capsule43
22
Bonusan Seleniometionina 200 120 Cápsulas · 0/2 requirementslowest seen
DosFarma+€3.99 delivery€22.99€0.192 /capsule42
23Bulevipfree delivery from €40€28.99€0.193 /capsule42
24
Naturmil Selenio Ace 30 Perlas · 0/2 requirements
PromoFarma€6.72€0.224 /capsule41
25
Neo Selenio 50 caps · 0/2 requirements
PromoFarma€11.99€0.240 /capsule40
26PromoFarma€15.59€0.312 /capsule39
27
NUTRICIÓN MÉDICA Nm Selenio 90 caps5.0 (1) · 0/2 requirementspricey now
PromoFarma€29.99€0.333 /capsule39
28
Ele2pharma Pop-Eyes Selenium® 60 caps · 0/2 requirements
PromoFarma€24.29€0.405 /capsule38
29
Natysal Maca Negra con Vitamina B6, Selenio y Zinc 30 Cápsulas · 0/2 requirements
DosFarma+€3.99 delivery€15.99€0.533 /capsule37
30
Hübner Silicea Biotina + Selenio 30 Cápsulas · 0/2 requirements
DosFarma+€3.99 delivery€24.99€0.833 /capsule36

33 products in this table

Out of stock right now (4), left out of the table until they are back: Vitaminalia L-seleniometionina (100mcg selenio) 180 tabletas, Swanson SelenoExcell® selenio 200mcg 60 cápsulas, Holland & Barrett Selenio 200µg - 240 Tabletas, Holland & Barrett Selenio + Zinc y Vitaminas A, C y E - 120 Tabletas.

What you are looking at. 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. Every product explains its mark line by line on its own page. How it is calculated.

Questions about selenium

Answered with the data on this page

Which selenium should you buy?
Swanson L-seleniometionina (100mcg selenio) 200 cápsulas from HSN, with 75 points out of 100 at €0.037/capsule. The mark is 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, and no commercial deal moves the ranking.
Which is the cheapest selenium?
Hivital Selenio 100mcg 180 Cápsulas from DosFarma, at €0.111/capsule (180 capsules pack for 19,99 €). It sits at verification level 1 out of 4. Cheap is not the same as well scored: price is 35 % of the mark and most of the rest is how verifiable its certification is.
How much does a capsule of selenium cost?
Between €0.111/capsule and €0.833/capsule across the 5 stores compared, with a median of €0.224/capsule. That is the price per capsule, not per pack: two tubs at the same price can cost twice as much as each other depending on what is inside.
What certification should selenium have?
Of the 33 products compared, 0 reach level 4 (the certification is backed by a third party: either we checked it with the body that issues it, or the product carries in its name a trademark that requires a third party behind it, such as Creapure or IFOS) and 0 reach level 3 (a lab report published by the brand itself). The remaining 33 stop at a certification claimed on the product page, or none at all. Only level 4 is checked against whoever issues the certification.
More specific questions about selenium4 comparisons — the same table, filtered
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The raw data. This ranking is also available as JSON, with the collection date and a link to each product page. It can be cited and reused as long as you say where it comes from and which day the prices are from.