Magnesium form picker

Pick the magnesium form for the job, not the biggest label number.

Glycinate, citrate, and oxide can all say magnesium on the front label. The execution difference is absorption confidence, tolerance, pill burden, and whether the form fits the rest of the stack.

Quick pick

Use citrate as the practical default, glycinate when tolerance is the limiting factor, and oxide only when its cost or compact dose advantage is worth the lower absorption confidence.

Read the full evidence breakdown

Form matrix

Magnesium form changes the tradeoff

FormBest roleAbsorptionToleranceCost

CitrateDefaultModerate-highModerateMedium

GlycinateToleranceModerateHigherHigher

OxideBudgetLowerLowerLow

Magnesium citrate

Practical daily default

Confidence: Higher absorption confidence than oxide
Watchout: Can loosen stools at higher doses
First move: Start here when cost and evidence both matter.

Magnesium glycinate

Tolerance-first evening slot

Confidence: Good practical fit; sleep claims vary by product
Watchout: Often costs more and serving size can climb
First move: Use when citrate bothers your gut or adherence matters most.

Magnesium oxide

Low-cost, compact labels

Confidence: Lower absorption confidence in human comparisons
Watchout: High elemental number can overstate usefulness
First move: Use only when the tradeoff is intentional.

SituationPickReason

Need a default

Citrate

Evidence and cost are balanced.

Sensitive stomach

Glycinate

Tolerance is the main constraint.

Cheapest option

Citrate or oxide

Prefer citrate if budget allows.

Evening stack

Glycinate

Cleaner fit when GI disruption would break adherence.

On antibiotics

Ask pharmacist

Medication timing matters more than form.

Kidney disease

Clinician-guided only

Magnesium handling can become unsafe.

Related stack checks

Audit the label before the form decision Check mineral and antibiotic timing Keep calcium and iron out of the same slot

Evidence Brief

Get supplement timing and safety notes as they ship.

Monthly evidence briefs. No hype, no disease claims, no influencer supplement stacks.

These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any disease. Generated with AI assistance. Always verify with a healthcare professional. Educational information only. Not a substitute for professional medical advice.