Magnesium Glycinate vs Citrate vs Malate – Which Form Should You Choose?
Choose magnesium glycinate if you want a form that is gentle on the stomach and often used in the evening, magnesium citrate if you want a well-documented and affordable option with good bioavailability, and magnesium malate if you prefer a form many associate with daytime use. All three count as organic magnesium forms, which are generally absorbed better in the gut than inorganic forms such as magnesium oxide.
The difference lies not in the magnesium itself – but in which molecule the magnesium is bound to. That bond affects how well the form is absorbed, how it feels in the stomach and how much magnesium each capsule actually contains. Below we go through the three main forms in depth and also compare them with taurate, oxide and L-threonate.
What does "form" of magnesium mean?
Magnesium is a mineral that the body cannot store in unlimited amounts, and it is involved in over 300 enzymatic processes. In a supplement, magnesium is always bound to something – an acid, an amino acid or a salt. It is that bond which determines the form:
- Glycinate – magnesium bound to the amino acid glycine (sometimes called bisglycinate).
- Citrate – magnesium bound to citric acid.
- Malate – magnesium bound to malic acid.
- Taurate – magnesium bound to the amino acid taurine.
- Oxide – magnesium bound to oxygen (inorganic salt).
Inorganic forms such as magnesium oxide contain more magnesium per gram but are absorbed less well. Organic forms generally have higher bioavailability. According to EFSA, magnesium contributes, among other things, to normal muscle function, normal functioning of the nervous system, normal psychological function, electrolyte balance, the maintenance of normal bones and the reduction of tiredness and fatigue – regardless of which form you choose.
Magnesium glycinate – the stomach-friendly form
Magnesium glycinate is magnesium bound to glycine, an amino acid the body recognises well. The form is known for being gentle on the stomach, which makes it popular with anyone who gets loose stools from other magnesium supplements. Many choose glycinate in the evening as part of a calm routine. A typical capsule provides around 130–200 mg of elemental magnesium. If you want to try the form, we have magnesium glycinate in chelated Albion form.
Magnesium citrate – the affordable all-rounder
Magnesium citrate is the most studied organic form and has good bioavailability. It is affordable and widely available. In higher doses, citrate has a mild fluid-drawing effect in the gut and can loosen the stools – which is why it is sometimes used specifically to counteract sluggish digestion. Start with a lower dose and increase gradually.
Magnesium malate – the form many associate with daytime
Magnesium malate is magnesium bound to malic acid, an acid involved in the body's own energy metabolism. The form is well absorbed and is often described as a daytime option. Scientifically, malate is less studied than citrate, but its bioavailability is good.
Magnesium taurate and magnesium oxide
Magnesium taurate is bound to taurine, is usually well tolerated and has good bioavailability. Magnesium oxide is an inorganic form that contains a lot of magnesium per gram but is absorbed considerably less well; in higher doses it has a distinct laxative effect.
Comparison: common magnesium forms
| Property | Glycinate | Citrate | Malate | Oxide |
|---|---|---|---|---|
| Bound to | Glycine | Citric acid | Malic acid | Oxygen |
| Bioavailability | High | High | High | Low |
| Stomach-friendliness | Very good | Can loosen stools at higher doses | Good | Can loosen stools |
| Most common for | Evening, sensitive stomach | All-round, affordable | Daytime use | Low price |
How to choose the right form – step by step
Step 1 – Start with your stomach
Do you have a sensitive stomach or get loose stools from supplements? Choose glycinate. Can you handle most things? Citrate works excellently.
Step 2 – Think about when you take it
If you want to take magnesium in the evening as part of a calm routine, glycinate suits you. If you prefer daytime use, malate may feel more natural.
Step 3 – Check the amount of elemental magnesium
Always read how many milligrams of elemental magnesium a capsule provides – not the total weight of the compound. That is the figure that counts towards your daily requirement.
Frequently asked questions (FAQ)
Organic forms – glycinate, citrate and malate – generally have higher bioavailability than inorganic forms such as magnesium oxide. The difference between the three organic forms is small; stomach-friendliness and when you take it usually matter more.
Is magnesium glycinate best for a sensitive stomach?Glycinate is known for being gentle on the stomach and is often the first choice for anyone who gets loose stools from other forms.
How much magnesium do I need per day?The recommended daily intake for adults is around 280–350 mg according to the Swedish Food Agency, with some variation between sexes and ages.
Can I take magnesium in the evening?Yes, magnesium can be taken at any time of day. If you specifically want to shorten the time it takes to fall asleep, it is melatonin that has an approved health claim – read more in our melatonin guide.
Is there an upper limit?EFSA has set a safe upper level of 250 mg of elemental magnesium per day from supplements (in addition to diet). Do not exceed the recommended dose on the packaging.
Summary
Glycinate, citrate and malate are all organic magnesium forms with good bioavailability. Choose glycinate for stomach-friendliness and evening use, citrate for an affordable all-round option and malate for daytime use. See our full range for sleep and recovery or go straight to magnesium glycinate.
Supplements are not a substitute for a varied diet and a healthy lifestyle. The information above is general information and not medical advice. Consult a doctor if you are pregnant, breastfeeding, taking medication or have a kidney disorder.
