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HealthspanMinerals

Magnesium 375mg 90 Tablets

£11.04 for 90 tablets at Healthspan. It carries more than one active ingredient, so it is not ranked against single-ingredient products. Each price below counts one ingredient only.

What it really costs, per 100 mg magnesium3pOne 100 mg dose is our comparison unit for magnesium. It is not a recommendation.
A day3p
A week23p
A month98p
A year£11.94

At one 100 mg dose a day, this pack lasts 11 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Magnesium

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 375 mg = 33.8 g
  • £11.04 ÷ 33.8 g × 100 mg = 3.27p per 100 mg magnesium
  • A week 3.27p × 7 = 23p · a month × 30 = 98p · a year × 365 = £11.94
  • Amount per serving: stated on the label.

Biotin

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 25 µg = 2.25 mg
  • £11.04 ÷ 2.25 mg × 5 mg = £24.53 per 5 mg
  • A week £24.53 × 7 = £171.73 · a month × 30 = £736.00 · a year × 365 = £8954.67
  • Amount per serving: stated on the label.

Niacin (vitamin B3)

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 4 mg = 360 mg
  • £11.04 ÷ 360 mg × 500 mg = £15.33 per 500 mg
  • A week £15.33 × 7 = £107.33 · a month × 30 = £460.00 · a year × 365 = £5596.67
  • Amount per serving: stated on the label.

Riboflavin (vitamin B2)

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 0.35 mg = 31.5 mg
  • £11.04 ÷ 31.5 mg × 100 mg = £35.05 per 100 mg
  • A week £35.05 × 7 = £245.33 · a month × 30 = £1051.43 · a year × 365 = £12792.38
  • Amount per serving: stated on the label.

Thiamine (vitamin B1)

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 0.28 mg = 24.8 mg
  • £11.04 ÷ 24.8 mg × 100 mg = £44.61 per 100 mg
  • A week £44.61 × 7 = £312.24 · a month × 30 = £1338.18 · a year × 365 = £16281.21
  • Amount per serving: stated on the label.

Vitamin B6

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 0.7 mg = 63 mg
  • £11.04 ÷ 63 mg × 50 mg = £8.76 per 50 mg
  • A week £8.76 × 7 = £61.33 · a month × 30 = £262.86 · a year × 365 = £3198.10
  • Amount per serving: stated on the label.

Vitamin C

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 40 mg = 3.6 g
  • £11.04 ÷ 3.6 g × 1 g = £3.07 per 1 g
  • A week £3.07 × 7 = £21.47 · a month × 30 = £92.00 · a year × 365 = £1119.33
  • 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.

How it compares: magnesium oxide

All 9, ranked →
Magnesium 375mg 180 Tablets (3 month supply)Cheapest per 100 mg magnesiumBoots · 375 mg a serving · £1.14 a month · a pack lasts 11 months4p£12.85View at Boots (opens in a new tab)
Magnesium 375mg 60 Tablets (1 Month Supply)Boots · 375 mg a serving · £1.41 a month · a pack lasts 4 months5p£5.30View at Boots (opens in a new tab)
Magnesium Tablets 200mgSimply Supplements · 100 mg a serving · £1.61 a month · a pack lasts 12 months5p£19.29View at Simply Supplements (opens in a new tab)
This productHealthspan · 375 mg a serving · 98p a month · a pack lasts 11 months3pshown above

Ranked purely by price per 100 mg magnesium. 91 combination products also contain magnesium.

How it compares: biotin

All 20, ranked →
WeightWorldBiotin Vitamin B7 TabletsCheapest per 5 mgWeightWorld · 12 mg a serving · 34p a month · a pack lasts 2.4 years1p£9.99View at WeightWorld (opens in a new tab)
VitaBrightBiotin Hair Growth SupplementVitaBright · 12 mg a serving · 62p a month · a pack lasts 2.6 years2p£19.99View at VitaBright (opens in a new tab)
VitaBrightBiotin Tablets with CoconutVitaBright · 12 mg a serving · 62p a month · a pack lasts 2.6 years2p£19.99View at VitaBright (opens in a new tab)
This productHealthspan · 25 µg a serving · £736.00 a month · a pack lasts under a day£24.53shown above

Ranked purely by price per 5 mg. 244 combination products also contain biotin.

How it compares: niacinamide

All 5, ranked →
NiacinamideCheapest per 500 mgHealf · 500 mg a serving · £3.42 a month · a pack lasts 6 months11p£20.49View at Healf (opens in a new tab)
Niacinamide TabletsMyprotein · 450 mg a serving · £3.70 a month · a pack lasts 3 months12p£9.99View at Myprotein (opens in a new tab)
Vitamin B3 (Niacin) 250mgLamberts Healthcare (Nature's Best) · 250 mg a serving · £4.50 a month · a pack lasts 50 days15p£7.50View at Lamberts Healthcare (opens in a new tab)
This productHealthspan · 4 mg a serving · £460.00 a month · a pack lasts under a day£15.33shown above

Ranked purely by price per 500 mg. 164 combination products also contain niacin (vitamin B3).

How it compares: riboflavin (vitamin B2)

Compare every product in this form →
RiboflavinCheapest per 100 mgHealf · 400 mg a serving · £2.31 a month · a pack lasts 8 months8p£18.49View at Healf (opens in a new tab)
Vitamin B2 100mgHealf · 100 mg a serving · £2.76 a month · a pack lasts 3 months9p£9.21View at Healf (opens in a new tab)
Vitamin B2 (Riboflavin) 50mgLamberts Healthcare (Nature's Best) · 50 mg a serving · £3.90 a month · a pack lasts 50 days13p£6.50View at Lamberts Healthcare (opens in a new tab)
This productHealthspan · 0.35 mg a serving · £1051.43 a month · a pack lasts under a day£35.05shown above

Ranked purely by price per 100 mg. 192 combination products also contain riboflavin (vitamin B2).

How it compares: 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 (opens in a new tab)
Natures AidVitamin B1 100mg 90 TabletsLloyds Pharmacy · 100 mg a serving · £3.48 a month · a pack lasts 3 months12p£10.44View at Lloyds Pharmacy (opens in a new tab)
This productHealthspan · 0.28 mg a serving · £1338.18 a month · a pack lasts under a day£44.61shown above

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

How it compares: vitamin B6 pyridoxine HCl

All 6, ranked →
ZipVitVitamin B6 50mgCheapest per 50 mgZipVit · 50 mg a serving · £1.00 a month · a pack lasts 12 months3p£11.99View at ZipVit (opens in a new tab)
Vitamin B6 Tablets 50mgSimply Supplements · 50 mg a serving · £1.11 a month · a pack lasts 12 months4p£13.29View at Simply Supplements (opens in a new tab)
Vitamin B6 100mgHealf · 100 mg a serving · £1.39 a month · a pack lasts 7 months5p£9.25View at Healf (opens in a new tab)
This productHealthspan · 0.7 mg a serving · £262.86 a month · a pack lasts 1 day£8.76shown above

Ranked purely by price per 50 mg. 280 combination products also contain vitamin B6.

How it compares: vitamin C

All 113, ranked →
Vitamin C Crystals PowderCheapest per 1 gHealf · 1.1 g a serving · £1.03 a month · a pack lasts 7 months3p£7.78View at Healf (opens in a new tab)
Vitamin C PowderLamberts Healthcare (Nature's Best) · 1 g a serving · £1.50 a month · a pack lasts 8 months5p£12.50View at Lamberts Healthcare (opens in a new tab)
WeightWorldVitamin C With Rosehip and Bioflavonoids TabletsWeightWorld · 1 g a serving · £1.65 a month · a pack lasts 6 months5p£9.89View at WeightWorld (opens in a new tab)
This productHealthspan · 40 mg a serving · £92.00 a month · a pack lasts 4 days£3.07shown above

Ranked purely by price per 1 g. 950 combination products also contain vitamin C.

On the label

Magnesium · Oxide
375 mg per serving (stated on the label)
Biotin · Biotin
25 µg per serving (stated on the label)
Pack
90 tablets · 90 servings · 1 tablet(s) a serving
Cost per serving
12p (90 servings in the pack)
More label details
Niacin (vitamin B3) · Niacinamide
4 mg per serving (stated on the label)
Riboflavin (vitamin B2) · Riboflavin
0.35 mg per serving (stated on the label)
Thiamine (vitamin B1) · Thiamine
0.28 mg per serving (stated on the label)
Vitamin B6 · Pyridoxine HCl
0.7 mg per serving (stated on the label)
Vitamin C · Standard (ascorbic acid and ascorbates)
40 mg per serving (stated on the label)
Sold by
Healthspan
What the listing says
“90 Tablets” · “Swallow 1 tablet daily” · “Biotin ; 25 µg ; 50% NRV”
Ingredients

Magnesium Oxide, Magnesium Hydroxide, Bulking Agents (Microcrystalline Cellulose, Cross-Linked Cellulose Gum), Maltodextrin, Ascorbic Acid, Glazing Agents (Hydroxypropyl Methyl Cellulose, Magnesium Salts of Fatty Acids, Hydroxypropyl Cellulose, Polyethylene Glycol, Sucrose Esters of Fatty Acids, Talc, Carnauba Wax), Maize Starch, Nicotinamide, Calcium Pantothenate, Rice Starch, Pyridoxine Hydrochloride, Riboflavin, Thiamin Mononitrate, Colour (Iron Oxides, Iron Hydroxides), Pteroylmonoglutamic Acid, Biotin, Cyanocobalamin.

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

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

Price history

1 price change since 17 September 2026. Checked on 3 days, most recently 22 October 2026.

Lowest recorded
£11.049 Oct
Highest recorded
£12.9917 Sept
First recorded
£12.9917 Sept
Checked on
3 dayssince 17 Sept
Pack price at each check.
  1. Down at Healthspan: £12.99 → £11.04 (−15%)
  2. First checked at Healthspan: £12.99

Questions about this product

How much does Healthspan Magnesium 375mg 90 Tablets cost per 5 mg?

£24.53 per 5 mg, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

under a day at one 5 mg dose. The pack holds 2.25 mg in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 100 mg magnesium?

3p per 100 mg magnesium, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

11 months at one 100 mg dose. The pack holds 33.8 g in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 500 mg?

£15.33 per 500 mg, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

under a day at one 500 mg dose. The pack holds 360 mg in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 100 mg?

£35.05 per 100 mg, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

under a day at one 100 mg dose. The pack holds 31.5 mg in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 100 mg?

£44.61 per 100 mg, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

under a day at one 100 mg dose. The pack holds 24.8 mg in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 50 mg?

£8.76 per 50 mg, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

1 day at one 50 mg dose. The pack holds 63 mg in total.

How much does Healthspan Magnesium 375mg 90 Tablets cost per 1 g?

£3.07 per 1 g, from £11.04 for 90 tablets at Healthspan, checked on 22 October 2026.

How long does one pack last?

4 days at one 1 g dose. The pack holds 3.6 g in total.

About Healthspan

Founded 1996 · St Peter Port, Guernsey · Part of Orkla Health

Healthspan is a vitamins and supplements company founded in 1996 by Derek Coates and based at Healthspan House in St Peter Port, Guernsey. Norway's Orkla Health bought it from his estate in 2022 for an initial £65m. It sells vitamins, minerals, supplements, pet products and, under the Healthspan Elite name, sports nutrition.

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