Magnesium for Muscle Pain: Does It Help? Best Type and Dose

Does magnesium help muscle pain? The research

Magnesium is most likely to make a difference if you’re low in it, for example if you train hard, sweat a lot, or eat few nuts, seeds, beans and whole grains. See signs of magnesium deficiency and magnesium for cramps.

What magnesium does in muscles

Magnesium contributes to normal muscle function, electrolyte balance, normal energy-yielding metabolism and the reduction of tiredness and fatigue. Inside muscle cells it works alongside calcium: calcium triggers contraction and magnesium is needed for the muscle to relax again. That’s why low magnesium is linked with twitches and cramps, though taking extra when your levels are already fine is unlikely to add much.

Best magnesium for muscle pain

No form is proven best for muscle pain; what matters most is that it’s well absorbed and you take it consistently. Our Magnesium Glycinate Sleep Complex combines bisglycinate and citrate with glycine, L-theanine and botanicals, giving 290mg of magnesium per serving as a warm evening drink. See types of magnesium and magnesium for active people.

Epsom salts, sprays and gels

Epsom salts are magnesium sulphate. There’s no good evidence that useful amounts of magnesium pass through the skin, and a 2025 trial found a magnesium gel did no better than a placebo gel for soreness after downhill running. A warm bath or massage can still feel good for its own sake, but swallowing magnesium is the reliable way to raise your intake. For a topical option, see CBD balm for muscle pain.

How much and when

• Daily needs: the NHS says adults need 300mg a day (men) or 270mg (women), and most of this should come from food.
• Supplements: the NHS says 400mg a day or less from supplements is unlikely to cause harm. The soreness trial used 350mg.
• Timing: any time of day works; many people take it in the evening. See best time to take magnesium.
• How long: give it a few weeks. See how long magnesium takes to work.

Magnesium-rich foods

Good sources include nuts and seeds (especially pumpkin seeds and almonds), spinach and other leafy greens, beans and lentils, wholemeal bread and brown rice, and dark chocolate. A diet built around these usually covers your needs.

Side effects and who should check first

• Diarrhoea and stomach upset, mainly with oxide, citrate or high doses.
• Kidney problems: speak to your GP first, as magnesium can build up.
• Medicines: magnesium can reduce absorption of some antibiotics and osteoporosis medicines; leave a gap and ask a pharmacist.
• See your GP if muscle pain is severe, unexplained, comes with weakness, dark urine or fever, or started after a new medicine such as a statin.

What else helps sore muscles

• Gentle movement and building up training load gradually.
• Sleep: most muscle repair happens overnight. See magnesium for sleep.
• Enough protein and fluids after exercise.
• Heat, massage or stretching for comfort.
• Over-the-counter painkillers if needed, following the pharmacist’s advice.

Many active people also use CBD as part of their recovery routine. See CBD for muscle recovery and our honest look at CBD for pain.

Related guides

• Teeth grinding and jaw tension.
• Often sold for muscles: see what the research says about magnesium malate.
• Thinking of a soak instead? Read magnesium flakes: benefits and how to use them.
• If you’re aching all over, check the common causes first in our body aches guide.
• Forearm and elbow pain from overuse is often tendon related: see tennis elbow for what the NHS recommends.
• Muscle knots: causes and how to get rid of them.
• Burning or tingling pain down the back of one leg may be sciatica: see best CBD for sciatica? An honest guide.
• Does magnesium spray work for aches?
• For the protein side of muscle health, see our UK protein calculator table.
• If muscle pain is widespread and long-lasting, see our guide to fibromyalgia.
• Period pain relief: what works fast.
• If you have fibromyalgia, see what the research says on CBD and fibromyalgia.
• Before starting, check magnesium side effects and who should avoid it.
• For one brand’s muscle and joint sprays and gel, see BetterYou magnesium spray and gel.
• Our magnesium glycinate guide covers dose, timing and side effects for the form many active people choose.
• For creams, lotions and gels, see magnesium cream: does it work?
• See our list of foods high in magnesium for easy ways to eat more of it.
• If it’s your joints rather than your muscles, see our guide to vitamins and supplements for joint pain.
• For help picking a form and dose, read our best magnesium supplement buying guide.
• If it’s an urge to move rather than an ache, see magnesium cream and spray for restless legs.