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Minerals

Selenium, 100 tablets

£4.48 for 100 tablets at Healf. That works out at 4p per 100 µg selenium, which ranks it 9th of the 10 selenium selenomethionine products we price across 2 UK retailers.

What it really costs, per 100 µg selenium4pOne 100 µg dose is our comparison unit for selenium. It is not a recommendation.

A day4p

A week31p

A month£1.34

A year£16.35

At one 100 µg dose a day, this pack lasts 3 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Servings: 100 ÷ 1 per serving = 100
In the pack: 100 × 100 µg = 10 mg
£4.48 ÷ 10 mg × 100 µg = 4.48p per 100 µg selenium
A week 4.48p × 7 = 31p · a month × 30 = £1.34 · a year × 365 = £16.35
Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

Cheaper selenium selenomethionine

All 10, ranked →

SeleniumHealf · 200 µg a serving · £2.64 a month · a pack lasts 4 months9p£10.55View at Healf

SeleniumHealf · 200 µg a serving · £3.19 a month · a pack lasts 4 months11p£12.74View at Healf

Selenium 200mcgHealf · 200 µg a serving · £3.23 a month · a pack lasts 3 months11p£10.78View at Healf

SeleniumHealf · 100 µg a serving · £4.04 a month · a pack lasts 4 months13p£16.15View at Healf

SeleniumHealf · 100 µg a serving · £4.80 a month · a pack lasts 2 months16p£9.59View at Healf

This productHealf · 100 µg a serving · £1.34 a month · a pack lasts 3 months4pshown above

Ranked purely by price per 100 µg selenium. 80 combination products also contain selenium.

On the label

Selenium · Selenomethionine: 100 µg per serving (stated on the label)
Pack: 100 tablets · 100 servings · 1 tablet(s) a serving
Cost per serving: 4p (100 servings in the pack)

More label details

Sold by: Healf
What the listing says: “100 caps” · “Servings Per Container: 100” · “Serving Size: 1 Tablet” · “Selenium (Elemental) (from 20 mg L-Selenomethionine) ; 100 mcg” · “from 20 mg L-Selenomethionine”

Ingredients

Selenium (Elemental) (from 20 mg L-Selenomethionine), Bulking Agent (Microcrystalline Cellulose), Stearic Acid (Vegetable Source), Anti-Caking Agent (Magnesium Stearate (Vegetable Source))

From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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Daily doseµgFordays

One 100 µg dose is our comparison unit, not a recommendation.

Price history

No price change since 1 October 2026. Checked on 1 day, most recently 1 October 2026.

Price at every check: £4.48Healf
First recorded: £4.481 Oct
Checked on: 1 daysince 1 Oct

Checked once so far, on 1 October 2026.

1 OctFirst checked at Healf: £4.48

Questions about this product

How much does NOW Foods Selenium cost per 100 µg selenium?

4p per 100 µg selenium, from £4.48 for 100 tablets at Healf, checked on 30 September 2026.

Is it the cheapest selenium selenomethionine in the UK?

No, it is 9th of 10. Selenium at Healf works out at 3p per 100 µg selenium.

How long does one pack last?

3 months at one 100 µg dose. The pack holds 10 mg in total.

About NOW Foods

All 109 NOW Foods products, priced per dose

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