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Magnesium Glycinate (Bisglycinate) Capsules

£9.99 for 90 servings at WeightWorld. That works out at 6p per 100 mg magnesium, which ranks it 5th of the 66 magnesium bisglycinate products we price across 13 UK retailers.

What it really costs, per 100 mg magnesium6pOne 100 mg dose is our comparison unit for magnesium. It is not a recommendation.
A day6p
A week39p
A month£1.67
A year£20.26

At one 100 mg dose a day, this pack lasts 6 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Magnesium

  • In the pack: 90 × 200 mg = 18 g
  • £9.99 ÷ 18 g × 100 mg = 5.55p per 100 mg magnesium
  • A week 5.55p × 7 = 39p · a month × 30 = £1.67 · a year × 365 = £20.26
  • Amount per serving: stated on the label.

Vitamin B6

  • In the pack: 90 × 2 mg = 180 mg
  • £9.99 ÷ 180 mg × 50 mg = £2.77 per 50 mg
  • A week £2.77 × 7 = £19.43 · a month × 30 = £83.25 · a year × 365 = £1012.88
  • 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 magnesium bisglycinate

All 66, ranked →
Magnesium Bisglycinate 1500mgCheapest per 100 mg magnesiumSimply Supplements · 1.5 g a serving · 43p a month · a pack lasts 2.5 years1p£12.99View at Simply Supplements (opens in a new tab)
One NutritionPure Magnesium BisglycinateVitamin Planet · 700 mg a serving · 96p a month · a pack lasts 1.7 years3p£20.24View at Vitamin Planet (opens in a new tab)
ZipVitMagnesium Glycinate 2000mgZipVit · 400 mg a serving · £1.00 a month · a pack lasts 2 years3p£23.99View at ZipVit (opens in a new tab)
ZipVitMagnesium Glycinate 2000mgZipVit · 400 mg a serving · £1.25 a month · a pack lasts 8 months4p£9.99View at ZipVit (opens in a new tab)
WeightWorldThis productWeightWorld · 200 mg a serving · £1.67 a month · a pack lasts 6 months6pshown above

Ranked purely by price per 100 mg magnesium. Labels here do not all state the same thing: this one gives stated on the label, the cheapest gives estimated from the compound weight using our conversion factor. Check both before choosing. 86 combination products also contain magnesium.

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)
WeightWorldThis productWeightWorld · 2 mg a serving · £83.25 a month · a pack lasts 4 days£2.78shown above

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

On the label

Magnesium · Bisglycinate (glycinate)
200 mg per serving (stated on the label)
Vitamin B6 · Pyridoxine HCl
2 mg per serving (stated on the label)
Pack
90 servings · 2 capsule(s) a serving
Cost per serving
11p (90 servings in the pack)
More label details
Sold by
WeightWorld
What the listing says
“Servings per Container: 90” · “Take 2 capsules daily” · “Providing Elemental Magnesium ; 200 mg” · “Magnesium Bisglycinate ; 1420 mg”
Ingredients

Capsule Shell: Hypromellose (HPMC) Advice Do not exceed the recommended daily dose. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Discontinue use and consult a doctor if any adverse reactions occur. Not intended for use by persons under the age of 18.

From the WeightWorld 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

No price change since 9 October 2026. Checked on 1 day, most recently 9 October 2026.

Price at every check
£9.99WeightWorld
First recorded
£9.999 Oct
Checked on
1 daysince 9 Oct

Checked once so far, on 9 October 2026.

  1. First checked at WeightWorld: £9.99

Questions about this product

How much does WeightWorld Magnesium Glycinate (Bisglycinate) Capsules cost per 100 mg magnesium?

6p per 100 mg magnesium, from £9.99 for 90 servings at WeightWorld, checked on 9 October 2026.

Is it the cheapest magnesium bisglycinate in the UK?

No, it is 5th of 66. Magnesium Bisglycinate 1500mg at Simply Supplements works out at 1p per 100 mg magnesium.

How long does one pack last?

6 months at one 100 mg dose. The pack holds 18 g in total.

How much does WeightWorld Magnesium Glycinate (Bisglycinate) Capsules cost per 50 mg?

£2.78 per 50 mg, from £9.99 for 90 servings at WeightWorld, checked on 9 October 2026.

How long does one pack last?

4 days at one 50 mg dose. The pack holds 180 mg in total.

About WeightWorld

All 124 WeightWorld products, priced per dose

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All magnesiumEvery form, cheapest per 100 mg magnesium firstMagnesium Bisglycinate (glycinate)66 products ranked, from 1pMagnesium guideWhat it is, why people take it, how the forms differWeightWorldAll 124 products from this brand, per doseMineralsEverything 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