We earn commission on purchases made through our links. It never affects ranking: tables are ordered purely by price per dose, and no retailer or brand can pay for position.We earn commission when you buy through our links. It never affects the ranking. Full disclosure.

Natures AidVitamins

Vitamin B1 100mg 90 Tablets

£11.49 for 90 tablets at Lloyds Pharmacy. That works out at 13p per 100 mg, which ranks it 2nd of the 2 thiamine (vitamin B1) products we price across 2 UK retailers.

What it really costs, per 100 mg13pOne 100 mg dose is our comparison unit for thiamine (vitamin B1). It is not a recommendation.

A day13p

A week89p

A month£3.83

A year£46.60

At one 100 mg 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: 90 ÷ 1 per serving = 90
In the pack: 90 × 100 mg = 9 g
£11.49 ÷ 9 g × 100 mg = 12.8p per 100 mg
A week 12.8p × 7 = 89p · a month × 30 = £3.83 · a year × 365 = £46.60
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 thiamine (vitamin B1)

Compare every product in this form →

Vitamin B1 (Thiamin) 100mgCheapest per 100 mgLamberts Healthcare (Nature's Best) · 100 mg a serving · £2.50 a month · a pack lasts 3 months8p£7.50View at Lamberts Healthcare

Natures AidThis productLloyds Pharmacy · 100 mg a serving · £3.83 a month · a pack lasts 3 months13pshown above

Switching to the Lamberts Healthcare (Nature's Best) pack saves £1.33 a month at the same 100 mg dose.

Ranked purely by price per 100 mg. 208 combination products also contain thiamine (vitamin B1).

On the label

Thiamine (vitamin B1) · Thiamine: 100 mg per serving (stated on the label)
Pack: 90 tablets · 90 servings · 1 tablet(s) a serving
Cost per serving: 13p (90 servings in the pack)

More label details

Sold by: Lloyds Pharmacy
What the listing says: “90 Tablets” · “Take one tablet daily” · “Vitamin B1 100mg”

Ingredients

Thiamine Mononitrate (Vitamin B1), Microcrystalline Cellulose, Dicalcium Phosphate, Stearic Acid, Silicon Dioxide, Magnesium Stearate. Coating: Hydroxypropyl Methylcellulose, Glycerin.

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

Is something wrong? Tell us

Add to your basket

View basket

Your basket prices everything you take together: whole packs, delivery included, from as few websites as you like.

Daily dosemgFordays

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

Price history

No price change since 7 October 2026. Checked on 1 day, most recently 7 October 2026.

Price at every check: £11.49Lloyds Pharmacy
First recorded: £11.497 Oct
Checked on: 1 daysince 7 Oct

Checked once so far, on 7 October 2026.

7 OctFirst checked at Lloyds Pharmacy: £11.49

Questions about this product

How much does Natures Aid Vitamin B1 100mg 90 Tablets cost per 100 mg?

13p per 100 mg, from £11.49 for 90 tablets at Lloyds Pharmacy, checked on 7 October 2026.

Is it the cheapest thiamine (vitamin B1) in the UK?

No, it is 2nd of 2. Vitamin B1 (Thiamin) 100mg at Lamberts Healthcare (Nature's Best) works out at 8p per 100 mg.

How long does one pack last?

3 months at one 100 mg dose. The pack holds 9 g in total.

About Natures Aid

All 21 Natures Aid products, priced per dose

Keep comparing

All thiamine (vitamin B1)Every form, cheapest per 100 mg first Thiamine (vitamin B1) guideWhat it is, why people take it, how the forms differ Natures AidAll 21 products from this brand, per dose VitaminsEverything else we price in this category Thiamine (vitamin B1) price historyEvery thiamine (vitamin B1) product's price per dose and price history Build a basketThe cheapest way to buy several at once How we compareWhere every number on this page comes from