Magnesium for Sleep: Best Form, Dose and Timing
Quick answer: Magnesium glycinate is the form most people choose for an evening routine, because it's gentle on the stomach. Take it in the evening with food, and keep supplemental magnesium to 400mg a day or less unless your doctor advises otherwise. The research on magnesium and sleep is still limited and mixed, so think of it as one part of a good wind-down routine rather than a sleeping aid.
What magnesium does in the body
Magnesium is involved in hundreds of processes in the body. Magnesium contributes to normal psychological function, the normal functioning of the nervous system, normal muscle function, and a reduction of tiredness and fatigue.
Those roles are why magnesium has become a popular part of evening routines. It's worth being clear, though: there is no approved health claim that magnesium improves sleep, and studies so far have been small with mixed results. The benefit is most likely if your intake from food is low.
Are you getting enough from food?
The UK reference intake is 375mg a day. Good food sources include:
- Pumpkin seeds, almonds and cashews
- Spinach and other leafy greens
- Wholegrain bread, brown rice and oats
- Beans, lentils and tofu
- Dark chocolate
If your diet is low in these foods, a supplement can help top you up.
Which form is best for an evening routine?
| Form | What to know |
|---|---|
| Glycinate | Gentle on the stomach; the most popular choice for evenings |
| Citrate | Well absorbed, but can have a laxative effect at higher doses |
| Oxide | Cheap and common, but less well absorbed |
| Multi-form blends | Combine several forms in one product |
Our Magnesium Glycinate 5 in 1 Gummies are an easy evening option, and Magnesium 6 in 1 Advanced Complex combines six forms in one.
How much and when?
- Dose: the NHS says taking 400mg or less of magnesium supplements a day is unlikely to cause harm. Check the label and don't combine several magnesium products.
- Timing: many people take it with their evening meal, 1 to 2 hours before bed.
- With food: this can reduce any stomach upset.
Who should check first
- People with kidney disease
- Anyone taking antibiotics, osteoporosis medication or some heart medicines, as magnesium can affect absorption
- Pregnant or breastfeeding women
Build the routine around it
Magnesium works best as part of good sleep habits: a consistent bedtime, dim lights, fewer screens late at night and cutting caffeine after lunch. See our 10 evening habits for better sleep.
Building a better evening routine? Browse Better Sleep or take our 60-second health quiz.
FAQs
Does magnesium help you sleep?
Research is limited and mixed. Magnesium contributes to normal psychological function and nervous system function, and may be most helpful if your intake is low.
What's the best magnesium for sleep?
Magnesium glycinate is the most popular choice for evenings because it's gentle on the stomach.
Can I take magnesium every night?
Most healthy adults can, at 400mg or less a day of supplemental magnesium. Check with your GP if you have kidney problems or take other medicines.
Shop this guide
Magnesium Glycinate 5 in 1 Gummies
Magnesium 6 in 1 Advanced Complex
Sleep Night GummiesReviewed by John Lebach (Nutrition Coach) and Numan Caan (Senior Sports Scientist)
This article is for general information only and isn't medical advice. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. If you take prescribed medication, are pregnant or breastfeeding, speak to your GP or pharmacist before starting a supplement.
