Magnesium oxide is the cheapest form to manufacture, which is why it shows up in so many budget supplements, and it is also the form the body absorbs the least of, with most of it passing straight through you. This uses three forms the body can actually take up, chosen because each one leans toward a slightly different job.
Why three forms instead of one
Magnesium is involved in hundreds of processes in the body, from muscle contraction and relaxation to nervous system signalling to normal energy metabolism. But not all magnesium forms behave the same way once you swallow them. Oxide is poorly absorbed and can cause digestive upset at meaningful doses. Glycinate, malate and citrate are all better absorbed, and each is more commonly associated with a slightly different area: glycinate with calm and sleep, malate with daytime energy, citrate with general absorption and regularity.
Combining the three is a practical compromise: broad coverage across sleep, recovery and energy, without relying on a single form to do everything.
Key ingredients
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Magnesium glycinate: bound to the amino acid glycine, one of the gentler and better-absorbed forms, associated with sleep quality and a calmer nervous system.
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Magnesium malate: bound to malic acid, which plays a role in cellular energy production and is often associated with daytime energy and muscle comfort.
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Magnesium citrate: a well-absorbed and widely studied form, included to round out the blend's overall bioavailability.
At a glance
| Form |
Often associated with |
| Magnesium glycinate |
Sleep and calm |
| Magnesium malate |
Daytime energy and muscle comfort |
| Magnesium citrate |
General absorption and regularity |
What it supports
- Sleep quality and time to fall asleep
- Muscle recovery and fewer night-time cramps
- A calmer nervous system under stress
- Normal energy-yielding metabolism
- Support without the digestive upset of cheap magnesium oxide
How to take it
Two capsules in the evening, roughly an hour before bed.
If you are using it primarily for muscle recovery rather than sleep, splitting the dose, one capsule after training and one in the evening, also works.
What to expect
Sleep changes tend to show up fastest, often within the first week of consistent use.
Muscle cramping and recovery usually take two to three weeks of daily use to settle into a noticeable pattern.
Good to know
If you have kidney disease or are on medication that affects kidney function, talk to your doctor before taking a magnesium supplement, since the kidneys are responsible for clearing excess magnesium.
Magnesium can interact with certain antibiotics and osteoporosis medications. Take it at least two hours apart from these if you are prescribed either.