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Magnesium is one of the most abundant minerals in the body, involved in hundreds of biochemical reactions. It's best known for its contribution to the reduction of tiredness and fatigue, but it does much more besides – helping turn food into energy, and contributing to normal muscle function, the normal function of the nervous system, and the maintenance of normal bones and teeth.

Most people can get the magnesium they need from foods like leafy greens, nuts and seeds, but many of us still fall short of recommended intakes – especially on a restricted diet. If that's you, a supplement is a simple way to top up. Magnesium comes in several forms – capsules, effervescent powders, topical sprays and nighttime formulations among them – so there's usually one to suit your routine.

Read the full explainer: Magnesium, explained →

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METAGENICS Megamag 10-in-1 60 Chews
£40.00
METAGENICS Megamag 10-in-1 20 Chews
£16.00
NEW NORDIC Magic Magnesium Citrate 60 Tablets
£18.00 Unit price 30p peritem
NEW NORDIC Magic Magnesium Malate 60 Tablets
£20.75 Unit price 34.6p peritem
NEW NORDIC Magic Magnesium Citrate 60 Gummies
£24.00 Unit price 40p peritem
NEW NORDIC Magic Magnesium Glycinate 60 Tablets
£20.75 Unit price 34.6p peritem
20% off
LAMBERTS Magnesium Citrate 150mg 40 Gummies
Regular price£13.20£16.50 Unit price 33p peritem
VIRIDIAN Ionic Magnesium Liquid 100ml
£24.75 Unit price £247.50 perlitre
METAGENICS Megamag Perimeno 60 Tablets
£33.00 Unit price 55p peritem
METAGENICS Megamag Perimeno Plus 30 Dose
£33.00 Unit price £1.10 peritem
METAGENICS Megamag Fem Balance 30 Dose
£45.00 Unit price £1.50 peritem
FLORADIX Magnesium Liquid Formula 250ml
£11.50 Unit price £46.00 perlitre
BETTERYOU Magnesium Menopause Body Spray 100ml
£15.00 Unit price £150.00 perm
TERRANOVA Magnesium Calcium Complex 50 capsules
TERRANOVA Magnesium Calcium Complex 50 capsules
£11.25 Unit price 22.5p peritem
BETTERYOU Magnesium Sleep Kids' Body Spray 100ml
£10.00 Unit price £100.00 perlitre
OSIMAGNESIUM Magnesium Lotion + Msm 200ml
OSIMAGNESIUM Magnesium Lotion + Msm 200ml
£19.00 Unit price £95.00 perlitre
BETTERYOU Magnesium Sleep Lotion 180ml
BETTERYOU Magnesium Sleep Lotion 180ml
£12.00 Unit price £66.67 perlitre
BETTERYOU Magnesium Original Powder 120g
£15.00 Unit price £125.00 perkg

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