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Magnesium

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.

21% off

Reflex Nutrition
Reflex Nutrition Zinc & Magnesium 100 Caps

Sale price £10.99 Regular price £13.99

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19% off

BetterYou
Magnesium Oil Original Spray - 100 ml.

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

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17% off

Natural Vitality
Natural Calm Kids - Mixed Berry - 453g

Sale price £58.99 Regular price £70.99
Unit price£130.22 /kg

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17% off

Trace Minerals
Mega-Mag - 400mg - 118 ml.

Sale price £23.99 Regular price £28.99
Unit price£203.31 /L

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19% off

Swanson
Magnesium Orotate - 40mg - 60 caps

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

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18% off

Swanson
Magnesium Citrate - 225mg Super-Strength - 240 tablets

Sale price £22.99 Regular price £27.99
Unit price£0.10 each

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17% off

OstroVit
Magnesium Citrate Tabs - 90 tabs

Sale price £4.99 Regular price £5.99
Unit price£0.06 each

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18% off

NOW Foods
Magnesium Glycinate - 180 tabs

Sale price £32.99 Regular price £39.99
Unit price£0.18 each

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17% off

NOW Foods
Calcium & Magnesium - 100 tablets

Sale price £14.99 Regular price £17.99
Unit price£0.15 each

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18% off

NOW Foods
Magnesium Citrate - 200mg - 250 tablets

Sale price £41.99 Regular price £50.99
Unit price£0.17 each

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17% off

BetterYou
Magnesium Flakes Relax - 750g

Sale price £14.99 Regular price £17.99
Unit price£19.99 /kg

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19% off

NOW Foods
Magnesium & Potassium Aspartate with Taurine - 120 vcaps

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

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19% off

NOW Foods
Magnesium Malate Caps - 180 vcaps

Sale price £21.99 Regular price £26.99
Unit price£0.12 each

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18% off

NOW Foods
Magnesium Inositol Relax Powder - 454g

Sale price £30.99 Regular price £37.99
Unit price£68.26 /kg

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18% off

NOW Foods
Magnesium Glycinate with BioPerine - 60 vcaps

Sale price £13.99 Regular price £16.99
Unit price£0.23 each

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20% off

NOW Foods
100% Pure Magnesium Flakes - 750g

Sale price £15.99 Regular price £19.99
Unit price£21.32 /kg

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20% off

NOW Foods
Calcium & Magnesium with Vit D and Zinc - 120 softgels

Sale price £15.99 Regular price £19.99
Unit price£0.13 each

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17% off

Naughty Boy
Collab - Strawberry Pineapple - 198g

Sale price £28.99 Regular price £34.99
Unit price£146.41 /kg

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18% off

Reflex Nutrition
Reflex Nutrition Magnesium Bisglycinate 90 Caps

Sale price £8.99 Regular price £10.99

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20% off

DY Nutrition
DY Nutrition Magnesium 90 Tabs

Sale price £11.99 Regular price £14.99
Unit price£0.13 each

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21% off

DY Nutrition
DY Nutrition CA-ZN-MG 90 Tabs

Sale price £10.99 Regular price £13.99

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18% off

Conteh Sports
Conteh Sports Circulatory Complete 90 Caps

Sale price £46.99 Regular price £56.99

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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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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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19% off

Combat Fuel
Combat Fuel Zinc and Magnesium +B6

Sale price £21.99 Regular price £26.99

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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

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

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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19% off

Applied Nutrition
Applied Nutrition Zinc - Magnesium and Vitamin B6 90 Caps

Sale price £20.99 Regular price £25.99

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18% off

Applied Nutrition
Applied Nutrition Joint Complex (40+ RANGE) 300g Orange Burst

Sale price £22.99 Regular price £27.99

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17% off

Strom Sports
Strom Sports SupportMAX Joint 160 Caps

Sale price £52.99 Regular price £63.99

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17% off

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

Sale price £19.99 Regular price £23.99

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17% off

Applied Nutrition
Applied Nutrition Tri-Magnesium Powder 200g Tropical Vibes

Sale price £19.99 Regular price £23.99

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17% off

Applied Nutrition
Applied Nutrition Tri-Magnesium Powder 200g Blue Raspberry

Sale price £19.99 Regular price £23.99

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17% off

Applied Nutrition
Applied Nutrition Tri-Magnesium Powder 200g Strawberry & Raspberry

Sale price £19.99 Regular price £23.99

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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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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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