What Is Magnesium Glycinate?

Why the form matters

Magnesium is a mineral involved in hundreds of processes in the body. Supplements bind it to another molecule, and that pairing changes how well it is absorbed and how it feels in the gut.

Magnesium oxide is cheap and poorly absorbed. Magnesium citrate absorbs better but can be laxative. Magnesium glycinate binds magnesium to glycine, an amino acid, and is generally well tolerated.

What it is used for

Magnesium contributes to normal muscle function and to the reduction of tiredness and fatigue. Many people take glycinate in the evening because it is gentle on the stomach and fits naturally into a wind-down routine.

What it is not

Magnesium is not a sedative and not a sleeping tablet. If you are struggling with persistent insomnia, that is a conversation for a doctor, not a supplement aisle.

Dosage and timing

Stick to the serving stated on the label. Take it consistently for four to eight weeks before deciding whether it suits you, and check total magnesium intake if you take more than one supplement.