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Shop Magnesium supplements

Magnesium contributes to normal muscle function, energy metabolism and reduction of tiredness. GymStack offers citrate, bisglycinate, tri-magnesium blends and flavoured drink mixes from trusted supplement brands.

Ideal for athletes, shift workers and anyone with a demanding training schedule. Compare forms and strengths to find the right daily dose.

Shop with confidence — curated brands, fast UK delivery, free over £75.

19% off

Trained by JP
Magnesium - 120 caps

Sale price £21.99 Regular price £26.99
Unit price£0.18 each

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18% off

Revive
Magnesium Glycinate - 120 vcaps

Sale price £22.99 Regular price £27.99
Unit price£0.19 each

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17% off

OstroVit
Magnesium Potassium + B6 Shot - Lemon Lime Grape - 20 x 80 ml.

Sale price £28.99 Regular price £34.99
Unit price£18.12 /L

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19% off

BetterYou
Magnesium Gel - 150 ml.

Sale price £21.99 Regular price £26.99
Unit price£146.60 /L

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30% off

BetterYou
Magnesium Menopause Bath Flakes - 750g

Sale price £10.49 Regular price £14.99
Unit price£13.99 /kg

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18% off

BetterYou
Magnesium Flakes - 250g

Sale price £8.99 Regular price £10.99
Unit price£35.96 /kg

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17% off

OstroVit
Magnesium Glycinate - 90 caps

Sale price £9.99 Regular price £11.99
Unit price£0.11 each

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18% off

OstroVit
Magnesium Citrate - Natural - 200g

Sale price £8.99 Regular price £10.99
Unit price£44.95 /kg

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18% off

Doctors Best
High Absorption Magnesium - 105mg - 120 vcaps

Sale price £22.99 Regular price £27.99
Unit price£0.19 each

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19% off

Conteh Sports
Magnesium - 120 caps

Sale price £21.99 Regular price £26.99
Unit price£0.18 each

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17% off

BioTechUSA
Magnesium + Chelate - 60 caps

Sale price £9.99 Regular price £11.99
Unit price£0.17 each

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17% off

BioTechUSA
Magnesium Bisglycinate - 90 caps

Sale price £14.99 Regular price £17.99
Unit price£0.17 each

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17% off

Weider
Magnesium Liquid - Exotic-Orange - 20 x 25 ml.

Sale price £29.99 Regular price £35.99
Unit price£59.98 /L

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17% off

OstroVit
Magnesium Citrate - Raspberry Lemonade with Mint - 200g

Sale price £9.99 Regular price £11.99
Unit price£49.95 /kg

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18% off

NOW Foods
Magnesium Transporters - 180 vcaps

Sale price £26.99 Regular price £32.99
Unit price£0.15 each

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17% off

NOW Foods
Magnesium Bisglycinate Powder - 227g

Sale price £23.99 Regular price £28.99
Unit price£105.68 /kg

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18% off

NOW Foods
Magnesium Citrate - 400mg - 240 vcaps

Sale price £31.99 Regular price £38.99
Unit price£0.13 each

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19% off

NOW Foods
Magnesium Citrate - 400mg - 60 vcaps

Sale price £12.99 Regular price £15.99
Unit price£0.22 each

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18% off

NOW Foods
Magnesium Glycinate with BioPerine - 180 vcaps

Sale price £30.99 Regular price £37.99
Unit price£0.17 each

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19% off

NOW Foods
Magnesium Ascorbate - Buffered Powder - 227g

Sale price £20.99 Regular price £25.99
Unit price£92.47 /kg

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21% off

Essensey
Magnesium + Zinc + B6 - 120 caps

Sale price £10.99 Regular price £13.99
Unit price£0.09 each

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17% off

Chaos Crew
Chaos Crew ZMA (Zinc Magnesium Aspartate) 30 Caps

Sale price £14.99 Regular price £17.99
Unit price£0.50 each

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17% off

Warrior
Warrior Zinc Magnesium and B6 60 Tabs

Sale price £9.99 Regular price £11.99
Unit price£0.17 each

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17% off

Applied Nutrition
Tri-Magnesium - Blue Raspberry - 200g

Sale price £23.99 Regular price £28.99
Unit price£119.95 /kg

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18% off

Applied Nutrition
Tri-Magnesium - Lemon & Lime - 200g

Sale price £26.99 Regular price £32.99
Unit price£134.95 /kg

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17% off

Applied Nutrition
Tri-Magnesium - Strawberry Raspberry - 200g

Sale price £23.99 Regular price £28.99
Unit price£119.95 /kg

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18% off

Applied Nutrition
Tri-Magnesium - Tropical Vibes - 200g

Sale price £26.99 Regular price £32.99
Unit price£134.95 /kg

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20% off

BetterYou
Magnesium Flakes - 1000g

Sale price £15.99 Regular price £19.99
Unit price£15.99 /kg

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18% off

BetterYou
Magnesium Flakes - 5000g

Sale price £65.99 Regular price £79.99
Unit price£13.20 /kg

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30% off

BetterYou
Magnesium Flakes Muscle - 1000g

Sale price £13.99 Regular price £19.99
Unit price£13.99 /kg

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19% off

BetterYou
Magnesium Flakes Revive - 750g

Sale price £12.99 Regular price £15.99
Unit price£17.32 /kg

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25% off

BetterYou
Magnesium Flakes Sleep - 1000g

Sale price £17.24 Regular price £22.99
Unit price£17.24 /kg

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19% off

BetterYou
Magnesium Max Original - Unflavoured - 120g

Sale price £25.99 Regular price £31.99
Unit price£216.58 /kg

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19% off

BetterYou
Magnesium Max Sleep - Natural Cocoa - 160g

Sale price £21.99 Regular price £26.99
Unit price£137.44 /kg

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19% off

BetterYou
Magnesium Menopause Body Spray - 100 ml.

Sale price £21.99 Regular price £26.99
Unit price£219.90 /L

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19% off

BetterYou
Magnesium Muscle Body Spray - 100 ml.

Sale price £25.99 Regular price £31.99
Unit price£259.90 /L

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19% off

BetterYou
Magnesium Oil Joint Spray - 100 ml.

Sale price £25.99 Regular price £31.99
Unit price£259.90 /L

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19% off

BetterYou
Magnesium Oil Sensitive Spray - 100 ml.

Sale price £25.99 Regular price £31.99
Unit price£259.90 /L

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25% off

BetterYou
Magnesium Skin Body Lotion - 180 ml.

Sale price £17.99 Regular price £23.99
Unit price£99.94 /L

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30% off

BetterYou
Magnesium Sleep Body Spray - 100 ml.

Sale price £18.89 Regular price £26.99
Unit price£188.90 /L

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25% off

BetterYou
Magnesium Sleep Kids Body Lotion - 135 ml.

Sale price £13.49 Regular price £17.99
Unit price£99.93 /L

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25% off

BetterYou
Magnesium Sleep Kids Bath Flakes - 750g

Sale price £13.49 Regular price £17.99
Unit price£17.99 /kg

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17% off

BetterYou
Magnesium Sleep Kids Body Spray - 100 ml.

Sale price £14.99 Regular price £17.99
Unit price£149.90 /L

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25% off

BetterYou
Magnesium Sleep Mineral Lotion - 180 ml.

Sale price £17.99 Regular price £23.99
Unit price£99.94 /L

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18% off

BioTechUSA
Calcium Zinc Magnesium - 90 tabs

Sale price £17.99 Regular price £21.99
Unit price£0.20 each

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20% off

BioTechUSA
Calcium Zinc Magnesium for Active - 100 tablets

Sale price £11.99 Regular price £14.99
Unit price£0.12 each

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18% off

Carlson Labs
Chelated Magnesium - 200mg - 180 tablets

Sale price £46.99 Regular price £56.99
Unit price£0.26 each

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17% off

Cytoplan
Biofood Magnesium - 120 vegan tabs

Sale price £43.99 Regular price £52.99
Unit price£0.37 each

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18% off

Cytoplan
Magnesium Bisglycinate - 60 vcaps

Sale price £17.99 Regular price £21.99
Unit price£0.30 each

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18% off

Doctors Best
High Absorption Magnesium - 100mg - 240 tablets

Sale price £32.99 Regular price £39.99
Unit price£0.14 each

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