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.
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 →Ranked purely by price per 100 mg magnesium. 91 combination products also contain magnesium.
How it compares: biotin
All 20, ranked →Ranked purely by price per 5 mg. 244 combination products also contain biotin.
How it compares: niacinamide
All 5, ranked →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 →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 →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 →Ranked purely by price per 50 mg. 280 combination products also contain vitamin B6.
How it compares: vitamin C
All 113, ranked →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.
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Filled in from the label’s serving: 1 tablet.
What you paid
Optional. At Healthspan today: £11.04.
Bought it? We email you once, on , the day to reorder by, so it does not run out. No stack needed.
“Order by” allows 4 working days’ delivery from Healthspan and your spare days.
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
- Down at Healthspan: £12.99 → £11.04 (−15%)
- 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.
All 85 Healthspan products, priced per doseVisit Healthspan (opens in a new tab)
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