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Home › Minerals › Magnesium

Mag365Minerals

Magnesium Supplement plus Calcium, 210 g

£22.16 for 210 g at Vitamin Planet. 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 magnesium17pOne 100 mg dose is our comparison unit for magnesium. It is not a recommendation.
A day17p
A week£1.18
A month£5.07
A year£61.63

At one 100 mg dose a day, this pack lasts 4 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Magnesium

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 250 mg = 13.1 g
  • £22.16 ÷ 13.1 g × 100 mg = 16.9p per 100 mg magnesium
  • A week 16.9p × 7 = £1.18 · a month × 30 = £5.07 · a year × 365 = £61.63
  • Amount per serving: stated on the label.

Calcium

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 167 mg = 8.77 g
  • £22.16 ÷ 8.77 g × 500 mg = £1.26 per 500 mg calcium
  • A week £1.26 × 7 = £8.85 · a month × 30 = £37.91 · a year × 365 = £461.27
  • Amount per serving: stated on the label.

Potassium

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 200 mg = 10.5 g
  • £22.16 ÷ 10.5 g × 200 mg = 42.2p per 200 mg potassium
  • A week 42.2p × 7 = £2.95 · a month × 30 = £12.66 · a year × 365 = £154.06
  • Amount per serving: stated on the label.

Vitamin B6

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 1.3 mg = 68.3 mg
  • £22.16 ÷ 68.3 mg × 50 mg = £16.23 per 50 mg
  • A week £16.23 × 7 = £113.64 · a month × 30 = £487.03 · a year × 365 = £5925.57
  • Amount per serving: stated on the label.

Vitamin C

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 133 mg = 6.98 g
  • £22.16 ÷ 6.98 g × 1 g = £3.17 per 1 g
  • A week £3.17 × 7 = £22.22 · a month × 30 = £95.21 · a year × 365 = £1158.38
  • Amount per serving: stated on the label.

Vitamin D3

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 533 IU = 27,982.5 IU
  • £22.16 ÷ 27,982.5 IU × 1,000 IU = 79.2p per 1,000 IU
  • A week 79.2p × 7 = £5.54 · a month × 30 = £23.76 · a year × 365 = £289.05
  • Amount per serving: stated on the label.

Zinc

  • Servings: 210 ÷ 4 per serving = 52.5
  • In the pack: 52.5 × 6.7 mg = 351.8 mg
  • £22.16 ÷ 351.8 mg × 15 mg = 94.5p per 15 mg zinc
  • A week 94.5p × 7 = £6.61 · a month × 30 = £28.35 · a year × 365 = £344.92
  • 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 blends and other forms

All 79, ranked →
ZipVitMagnesium 500mgCheapest per 100 mg magnesiumZipVit · 500 mg a serving · 33p a month · a pack lasts 4.9 years1p£19.99View at ZipVit (opens in a new tab)
Magnesium Glycinate X3Protein Works · 1.81 g a serving · 40p a month · a pack lasts 2.2 years1p£10.99View at Protein Works (opens in a new tab)
Magnesium CapsHealf · 500 mg a serving · 41p a month · a pack lasts 1.4 years1p£6.75View at Healf (opens in a new tab)
Mag365This productVitamin Planet · 250 mg a serving · £5.07 a month · a pack lasts 4 months17pshown above

Ranked purely by price per 100 mg magnesium. 236 combination products also contain magnesium.

How it compares: other forms of calcium

All 25, ranked →
Calcium 1000mg & Vitamin D3 400iu TabletsCheapest per 500 mg calciumSimply Supplements · 1 g a serving · 94p a month · a pack lasts 12 months3p£11.29View at Simply Supplements (opens in a new tab)
Calcium & Magnesium TabletsMyprotein · 800 mg a serving · £2.29 a month · a pack lasts 5 months8p£10.99View at Myprotein (opens in a new tab)
ZipVitCalcium 400mg with Magnesium 200mgZipVit · 400 mg a serving · £2.29 a month · a pack lasts 9 months8p£21.99View at ZipVit (opens in a new tab)
Mag365This productVitamin Planet · 167 mg a serving · £37.91 a month · a pack lasts 18 days£1.26shown above

Ranked purely by price per 500 mg calcium. 216 combination products also contain calcium.

How it compares: other forms of potassium

Compare every product in this form →
Ionic Potassium Liquid ConcentrateCheapest per 200 mg potassiumHealf · 300 mg a serving · £15.60 a month · a pack lasts 38 days52p£19.50View at Healf (opens in a new tab)
Ionic Potassium Liquid ConcentrateMyprotein · 300 mg a serving · £16.00 a month · a pack lasts 38 days53p£20.00View at Myprotein (opens in a new tab)
Mag365This productVitamin Planet · 200 mg a serving · £12.66 a month · a pack lasts 53 days42pshown above

Ranked purely by price per 200 mg potassium. 58 combination products also contain potassium.

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)
Mag365This productVitamin Planet · 1.3 mg a serving · £487.03 a month · a pack lasts 1 day£16.23shown 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 Plus TabletsCheapest per 1 gMyprotein · 1 g a serving · £1.00 a month · a pack lasts 6 months3p£5.99View at Myprotein (opens in a new tab)
Vitamin C Crystals PowderHealf · 1.1 g a serving · £1.01 a month · a pack lasts 7 months3p£7.61View 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)
Mag365This productVitamin Planet · 133 mg a serving · £95.21 a month · a pack lasts 7 days£3.17shown above

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

How it compares: vitamin D3

All 207, ranked →
WeightWorldHigh-Strength Vitamin D3 TabletsCheapest per 1,000 IUWeightWorld · 4,000 IU a serving · 17p a month · a pack lasts 4.4 years1p£8.99View at WeightWorld (opens in a new tab)
ZipVitVitamin D3 4000iuZipVit · 4,000 IU a serving · 17p a month · a pack lasts 4 years1p£8.49View at ZipVit (opens in a new tab)
WeightWorldVitamin D3 + K2 (MK7) TabletsWeightWorld · 4,000 IU a serving · 21p a month · a pack lasts 4 years1p£9.99View at WeightWorld (opens in a new tab)
Mag365This productVitamin Planet · 533 IU a serving · £23.76 a month · a pack lasts 28 days79pshown above

Ranked purely by price per 1,000 IU. 439 combination products also contain vitamin D3.

How it compares: other forms of zinc

All 25, ranked →
Zinc 50mgCheapest per 15 mg zincHealf · 50 mg a serving · 84p a month · a pack lasts 10 months3p£8.44View at Healf (opens in a new tab)
Zinc Complex 360 TabletsHealthspan · 15 mg a serving · £1.08 a month · a pack lasts 12 months4p£12.99View at Healthspan (opens in a new tab)
Zinc Transporters TabletsHealf · 22 mg a serving · £1.13 a month · a pack lasts 4 months4p£4.99View at Healf (opens in a new tab)
Mag365This productVitamin Planet · 6.7 mg a serving · £28.35 a month · a pack lasts 23 days94pshown above

Ranked purely by price per 15 mg zinc. 149 combination products also contain zinc.

On the label

Magnesium · Blends and other forms
250 mg per serving (stated on the label)
Calcium · Other forms
167 mg per serving (stated on the label)
Pack
210 g · 52.5 servings · 4 g a serving
Cost per serving
42p (52.5 servings in the pack)
More label details
Potassium · Other forms
200 mg per serving (stated on the label)
Vitamin B6 · Pyridoxine HCl
1.3 mg per serving (stated on the label)
Vitamin C · Standard (ascorbic acid and ascorbates)
133 mg per serving (stated on the label)
Vitamin D3 · Vitamin D3
533 IU per serving (stated on the label)
Zinc · Other forms
6.7 mg per serving (stated on the label)
Sold by
Vitamin Planet
What the listing says
“210g” · “Amount per 4g” · “Calcium ; 167 mg ; 21%”
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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
£22.16Vitamin Planet
First recorded
£22.167 Oct
Checked on
1 daysince 7 Oct

Checked once so far, on 7 October 2026.

  1. First checked at Vitamin Planet: £22.16

Questions about this product

How much does Mag365 Magnesium Supplement plus Calcium cost per 500 mg calcium?

£1.26 per 500 mg calcium, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

18 days at one 500 mg dose. The pack holds 8.77 g in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 100 mg magnesium?

17p per 100 mg magnesium, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

4 months at one 100 mg dose. The pack holds 13.1 g in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 200 mg potassium?

42p per 200 mg potassium, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

53 days at one 200 mg dose. The pack holds 10.5 g in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 50 mg?

£16.23 per 50 mg, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

1 day at one 50 mg dose. The pack holds 68.3 mg in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 1 g?

£3.17 per 1 g, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

7 days at one 1 g dose. The pack holds 6.98 g in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 1,000 IU?

79p per 1,000 IU, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

28 days at one 1,000 IU dose. The pack holds 27,982.5 IU in total.

How much does Mag365 Magnesium Supplement plus Calcium cost per 15 mg zinc?

94p per 15 mg zinc, from £22.16 for 210 g at Vitamin Planet, checked on 7 October 2026.

How long does one pack last?

23 days at one 15 mg dose. The pack holds 351.8 mg in total.

Keep comparing

All magnesiumEvery form, cheapest per 100 mg magnesium firstMagnesium blends and other forms79 products rankedMagnesium guideWhat it is, why people take it, how the forms differMineralsEverything else we price in this categoryMagnesium price historyEvery magnesium product's price per dose and price historyBuild a basketThe cheapest way to buy several at onceHow we compareWhere every number on this page comes from